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‎.gitignore

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Cargo.lock
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target/
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.vscode/

‎.rustlings-state.txt

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DON'T EDIT THIS FILE!
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3+
move_semantics2
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intro1
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intro2
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variables1
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variables2
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variables3
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variables4
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variables5
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variables6
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functions1
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functions2
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functions3
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functions4
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functions5
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if1
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if2
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if3
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quiz1
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primitive_types1
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primitive_types2
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primitive_types3
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primitive_types4
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primitive_types5
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primitive_types6
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vecs1
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vecs2
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move_semantics1

‎Cargo.toml

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bin = [
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{ name = "intro1", path = "exercises/00_intro/intro1.rs" },
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{ name = "intro1_sol", path = "solutions/00_intro/intro1.rs" },
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{ name = "intro2", path = "exercises/00_intro/intro2.rs" },
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{ name = "intro2_sol", path = "solutions/00_intro/intro2.rs" },
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{ name = "variables1", path = "exercises/01_variables/variables1.rs" },
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{ name = "variables1_sol", path = "solutions/01_variables/variables1.rs" },
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{ name = "variables2", path = "exercises/01_variables/variables2.rs" },
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{ name = "variables2_sol", path = "solutions/01_variables/variables2.rs" },
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{ name = "variables3", path = "exercises/01_variables/variables3.rs" },
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{ name = "variables3_sol", path = "solutions/01_variables/variables3.rs" },
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{ name = "variables4", path = "exercises/01_variables/variables4.rs" },
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{ name = "variables4_sol", path = "solutions/01_variables/variables4.rs" },
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{ name = "variables5", path = "exercises/01_variables/variables5.rs" },
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{ name = "variables5_sol", path = "solutions/01_variables/variables5.rs" },
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{ name = "variables6", path = "exercises/01_variables/variables6.rs" },
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{ name = "variables6_sol", path = "solutions/01_variables/variables6.rs" },
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{ name = "functions1", path = "exercises/02_functions/functions1.rs" },
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{ name = "functions1_sol", path = "solutions/02_functions/functions1.rs" },
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{ name = "functions2", path = "exercises/02_functions/functions2.rs" },
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{ name = "functions2_sol", path = "solutions/02_functions/functions2.rs" },
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{ name = "functions3", path = "exercises/02_functions/functions3.rs" },
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{ name = "functions3_sol", path = "solutions/02_functions/functions3.rs" },
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{ name = "functions4", path = "exercises/02_functions/functions4.rs" },
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{ name = "functions4_sol", path = "solutions/02_functions/functions4.rs" },
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{ name = "functions5", path = "exercises/02_functions/functions5.rs" },
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{ name = "functions5_sol", path = "solutions/02_functions/functions5.rs" },
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{ name = "if1", path = "exercises/03_if/if1.rs" },
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{ name = "if1_sol", path = "solutions/03_if/if1.rs" },
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{ name = "if2", path = "exercises/03_if/if2.rs" },
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{ name = "if2_sol", path = "solutions/03_if/if2.rs" },
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{ name = "if3", path = "exercises/03_if/if3.rs" },
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{ name = "if3_sol", path = "solutions/03_if/if3.rs" },
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{ name = "quiz1", path = "exercises/quizzes/quiz1.rs" },
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{ name = "quiz1_sol", path = "solutions/quizzes/quiz1.rs" },
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{ name = "primitive_types1", path = "exercises/04_primitive_types/primitive_types1.rs" },
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{ name = "primitive_types1_sol", path = "solutions/04_primitive_types/primitive_types1.rs" },
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{ name = "primitive_types2", path = "exercises/04_primitive_types/primitive_types2.rs" },
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{ name = "primitive_types2_sol", path = "solutions/04_primitive_types/primitive_types2.rs" },
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{ name = "primitive_types3", path = "exercises/04_primitive_types/primitive_types3.rs" },
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{ name = "primitive_types3_sol", path = "solutions/04_primitive_types/primitive_types3.rs" },
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{ name = "primitive_types4", path = "exercises/04_primitive_types/primitive_types4.rs" },
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{ name = "primitive_types4_sol", path = "solutions/04_primitive_types/primitive_types4.rs" },
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{ name = "primitive_types5", path = "exercises/04_primitive_types/primitive_types5.rs" },
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{ name = "primitive_types5_sol", path = "solutions/04_primitive_types/primitive_types5.rs" },
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{ name = "primitive_types6", path = "exercises/04_primitive_types/primitive_types6.rs" },
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{ name = "primitive_types6_sol", path = "solutions/04_primitive_types/primitive_types6.rs" },
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{ name = "vecs1", path = "exercises/05_vecs/vecs1.rs" },
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{ name = "vecs1_sol", path = "solutions/05_vecs/vecs1.rs" },
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{ name = "vecs2", path = "exercises/05_vecs/vecs2.rs" },
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{ name = "vecs2_sol", path = "solutions/05_vecs/vecs2.rs" },
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{ name = "move_semantics1", path = "exercises/06_move_semantics/move_semantics1.rs" },
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{ name = "move_semantics1_sol", path = "solutions/06_move_semantics/move_semantics1.rs" },
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{ name = "move_semantics2", path = "exercises/06_move_semantics/move_semantics2.rs" },
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{ name = "move_semantics2_sol", path = "solutions/06_move_semantics/move_semantics2.rs" },
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{ name = "move_semantics3", path = "exercises/06_move_semantics/move_semantics3.rs" },
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{ name = "move_semantics3_sol", path = "solutions/06_move_semantics/move_semantics3.rs" },
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{ name = "move_semantics4", path = "exercises/06_move_semantics/move_semantics4.rs" },
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{ name = "move_semantics4_sol", path = "solutions/06_move_semantics/move_semantics4.rs" },
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{ name = "move_semantics5", path = "exercises/06_move_semantics/move_semantics5.rs" },
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{ name = "move_semantics5_sol", path = "solutions/06_move_semantics/move_semantics5.rs" },
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{ name = "structs1", path = "exercises/07_structs/structs1.rs" },
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{ name = "structs1_sol", path = "solutions/07_structs/structs1.rs" },
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{ name = "structs2", path = "exercises/07_structs/structs2.rs" },
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{ name = "structs2_sol", path = "solutions/07_structs/structs2.rs" },
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{ name = "structs3", path = "exercises/07_structs/structs3.rs" },
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{ name = "structs3_sol", path = "solutions/07_structs/structs3.rs" },
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{ name = "enums1", path = "exercises/08_enums/enums1.rs" },
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{ name = "enums1_sol", path = "solutions/08_enums/enums1.rs" },
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{ name = "enums2", path = "exercises/08_enums/enums2.rs" },
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{ name = "enums2_sol", path = "solutions/08_enums/enums2.rs" },
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{ name = "enums3", path = "exercises/08_enums/enums3.rs" },
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{ name = "enums3_sol", path = "solutions/08_enums/enums3.rs" },
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{ name = "strings1", path = "exercises/09_strings/strings1.rs" },
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{ name = "strings1_sol", path = "solutions/09_strings/strings1.rs" },
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{ name = "strings2", path = "exercises/09_strings/strings2.rs" },
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{ name = "strings2_sol", path = "solutions/09_strings/strings2.rs" },
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{ name = "strings3", path = "exercises/09_strings/strings3.rs" },
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{ name = "strings3_sol", path = "solutions/09_strings/strings3.rs" },
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{ name = "strings4", path = "exercises/09_strings/strings4.rs" },
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{ name = "strings4_sol", path = "solutions/09_strings/strings4.rs" },
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{ name = "modules1", path = "exercises/10_modules/modules1.rs" },
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{ name = "modules1_sol", path = "solutions/10_modules/modules1.rs" },
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{ name = "modules2", path = "exercises/10_modules/modules2.rs" },
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{ name = "modules2_sol", path = "solutions/10_modules/modules2.rs" },
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{ name = "modules3", path = "exercises/10_modules/modules3.rs" },
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{ name = "modules3_sol", path = "solutions/10_modules/modules3.rs" },
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{ name = "hashmaps1", path = "exercises/11_hashmaps/hashmaps1.rs" },
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{ name = "hashmaps1_sol", path = "solutions/11_hashmaps/hashmaps1.rs" },
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{ name = "hashmaps2", path = "exercises/11_hashmaps/hashmaps2.rs" },
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{ name = "hashmaps2_sol", path = "solutions/11_hashmaps/hashmaps2.rs" },
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{ name = "hashmaps3", path = "exercises/11_hashmaps/hashmaps3.rs" },
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{ name = "hashmaps3_sol", path = "solutions/11_hashmaps/hashmaps3.rs" },
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{ name = "quiz2", path = "exercises/quizzes/quiz2.rs" },
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{ name = "quiz2_sol", path = "solutions/quizzes/quiz2.rs" },
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{ name = "options1", path = "exercises/12_options/options1.rs" },
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{ name = "options1_sol", path = "solutions/12_options/options1.rs" },
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{ name = "options2", path = "exercises/12_options/options2.rs" },
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{ name = "options2_sol", path = "solutions/12_options/options2.rs" },
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{ name = "options3", path = "exercises/12_options/options3.rs" },
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{ name = "options3_sol", path = "solutions/12_options/options3.rs" },
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{ name = "errors1", path = "exercises/13_error_handling/errors1.rs" },
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{ name = "errors1_sol", path = "solutions/13_error_handling/errors1.rs" },
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{ name = "errors2", path = "exercises/13_error_handling/errors2.rs" },
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{ name = "errors2_sol", path = "solutions/13_error_handling/errors2.rs" },
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{ name = "errors3", path = "exercises/13_error_handling/errors3.rs" },
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{ name = "errors3_sol", path = "solutions/13_error_handling/errors3.rs" },
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{ name = "errors4", path = "exercises/13_error_handling/errors4.rs" },
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{ name = "errors4_sol", path = "solutions/13_error_handling/errors4.rs" },
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{ name = "errors5", path = "exercises/13_error_handling/errors5.rs" },
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{ name = "errors5_sol", path = "solutions/13_error_handling/errors5.rs" },
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{ name = "errors6", path = "exercises/13_error_handling/errors6.rs" },
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{ name = "errors6_sol", path = "solutions/13_error_handling/errors6.rs" },
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{ name = "generics1", path = "exercises/14_generics/generics1.rs" },
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{ name = "generics1_sol", path = "solutions/14_generics/generics1.rs" },
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{ name = "generics2", path = "exercises/14_generics/generics2.rs" },
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{ name = "generics2_sol", path = "solutions/14_generics/generics2.rs" },
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{ name = "traits1", path = "exercises/15_traits/traits1.rs" },
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{ name = "traits1_sol", path = "solutions/15_traits/traits1.rs" },
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{ name = "traits2", path = "exercises/15_traits/traits2.rs" },
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{ name = "traits2_sol", path = "solutions/15_traits/traits2.rs" },
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{ name = "traits3", path = "exercises/15_traits/traits3.rs" },
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{ name = "traits3_sol", path = "solutions/15_traits/traits3.rs" },
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{ name = "traits4", path = "exercises/15_traits/traits4.rs" },
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{ name = "traits4_sol", path = "solutions/15_traits/traits4.rs" },
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{ name = "traits5", path = "exercises/15_traits/traits5.rs" },
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{ name = "traits5_sol", path = "solutions/15_traits/traits5.rs" },
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{ name = "quiz3", path = "exercises/quizzes/quiz3.rs" },
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{ name = "quiz3_sol", path = "solutions/quizzes/quiz3.rs" },
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{ name = "lifetimes1", path = "exercises/16_lifetimes/lifetimes1.rs" },
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{ name = "lifetimes1_sol", path = "solutions/16_lifetimes/lifetimes1.rs" },
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{ name = "lifetimes2", path = "exercises/16_lifetimes/lifetimes2.rs" },
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{ name = "lifetimes2_sol", path = "solutions/16_lifetimes/lifetimes2.rs" },
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{ name = "lifetimes3", path = "exercises/16_lifetimes/lifetimes3.rs" },
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{ name = "lifetimes3_sol", path = "solutions/16_lifetimes/lifetimes3.rs" },
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{ name = "tests1", path = "exercises/17_tests/tests1.rs" },
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{ name = "tests1_sol", path = "solutions/17_tests/tests1.rs" },
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{ name = "tests2", path = "exercises/17_tests/tests2.rs" },
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{ name = "tests2_sol", path = "solutions/17_tests/tests2.rs" },
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{ name = "tests3", path = "exercises/17_tests/tests3.rs" },
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{ name = "tests3_sol", path = "solutions/17_tests/tests3.rs" },
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{ name = "iterators1", path = "exercises/18_iterators/iterators1.rs" },
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{ name = "iterators1_sol", path = "solutions/18_iterators/iterators1.rs" },
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{ name = "iterators2", path = "exercises/18_iterators/iterators2.rs" },
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{ name = "iterators2_sol", path = "solutions/18_iterators/iterators2.rs" },
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{ name = "iterators3", path = "exercises/18_iterators/iterators3.rs" },
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{ name = "iterators3_sol", path = "solutions/18_iterators/iterators3.rs" },
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{ name = "iterators4", path = "exercises/18_iterators/iterators4.rs" },
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{ name = "iterators4_sol", path = "solutions/18_iterators/iterators4.rs" },
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{ name = "iterators5", path = "exercises/18_iterators/iterators5.rs" },
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{ name = "iterators5_sol", path = "solutions/18_iterators/iterators5.rs" },
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{ name = "box1", path = "exercises/19_smart_pointers/box1.rs" },
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{ name = "box1_sol", path = "solutions/19_smart_pointers/box1.rs" },
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{ name = "rc1", path = "exercises/19_smart_pointers/rc1.rs" },
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{ name = "rc1_sol", path = "solutions/19_smart_pointers/rc1.rs" },
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{ name = "arc1", path = "exercises/19_smart_pointers/arc1.rs" },
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{ name = "arc1_sol", path = "solutions/19_smart_pointers/arc1.rs" },
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{ name = "cow1", path = "exercises/19_smart_pointers/cow1.rs" },
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{ name = "cow1_sol", path = "solutions/19_smart_pointers/cow1.rs" },
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{ name = "threads1", path = "exercises/20_threads/threads1.rs" },
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{ name = "threads1_sol", path = "solutions/20_threads/threads1.rs" },
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{ name = "threads2", path = "exercises/20_threads/threads2.rs" },
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{ name = "threads2_sol", path = "solutions/20_threads/threads2.rs" },
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{ name = "threads3", path = "exercises/20_threads/threads3.rs" },
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{ name = "threads3_sol", path = "solutions/20_threads/threads3.rs" },
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{ name = "macros1", path = "exercises/21_macros/macros1.rs" },
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{ name = "macros1_sol", path = "solutions/21_macros/macros1.rs" },
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{ name = "macros2", path = "exercises/21_macros/macros2.rs" },
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{ name = "macros2_sol", path = "solutions/21_macros/macros2.rs" },
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{ name = "macros3", path = "exercises/21_macros/macros3.rs" },
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{ name = "macros3_sol", path = "solutions/21_macros/macros3.rs" },
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{ name = "macros4", path = "exercises/21_macros/macros4.rs" },
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{ name = "macros4_sol", path = "solutions/21_macros/macros4.rs" },
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{ name = "clippy1", path = "exercises/22_clippy/clippy1.rs" },
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{ name = "clippy1_sol", path = "solutions/22_clippy/clippy1.rs" },
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{ name = "clippy2", path = "exercises/22_clippy/clippy2.rs" },
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{ name = "clippy2_sol", path = "solutions/22_clippy/clippy2.rs" },
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{ name = "clippy3", path = "exercises/22_clippy/clippy3.rs" },
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{ name = "clippy3_sol", path = "solutions/22_clippy/clippy3.rs" },
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{ name = "using_as", path = "exercises/23_conversions/using_as.rs" },
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{ name = "using_as_sol", path = "solutions/23_conversions/using_as.rs" },
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{ name = "from_into", path = "exercises/23_conversions/from_into.rs" },
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{ name = "from_into_sol", path = "solutions/23_conversions/from_into.rs" },
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{ name = "from_str", path = "exercises/23_conversions/from_str.rs" },
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{ name = "from_str_sol", path = "solutions/23_conversions/from_str.rs" },
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{ name = "try_from_into", path = "exercises/23_conversions/try_from_into.rs" },
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{ name = "try_from_into_sol", path = "solutions/23_conversions/try_from_into.rs" },
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{ name = "as_ref_mut", path = "exercises/23_conversions/as_ref_mut.rs" },
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{ name = "as_ref_mut_sol", path = "solutions/23_conversions/as_ref_mut.rs" },
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]
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[package]
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name = "exercises"
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edition = "2021"
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# Don't publish the exercises on crates.io!
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publish = false
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[profile.release]
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panic = "abort"
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[profile.dev]
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panic = "abort"
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[lints.rust]
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# You shouldn't write unsafe code in Rustlings!
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unsafe_code = "forbid"
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# You don't need unstable features in Rustlings and shouldn't rely on them while learning Rust.
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unstable_features = "forbid"
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# Dead code warnings can't be avoided in some exercises and might distract while learning.
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dead_code = "allow"
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[lints.clippy]
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# You forgot a `todo!()`!
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todo = "forbid"
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# This can only happen by mistake in Rustlings.
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empty_loop = "forbid"
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# No infinite loops are needed in Rustlings.
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infinite_loop = "deny"
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# You shouldn't leak memory while still learning Rust!
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mem_forget = "deny"
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# Currently, there are no disallowed methods. This line avoids problems when developing Rustlings.
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disallowed_methods = "allow"

‎exercises/00_intro/README.md

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# Intro
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Rust uses the `print!` and `println!` macros to print text to the console.
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## Further information
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- [Hello World](https://doc.rust-lang.org/rust-by-example/hello.html)
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- [Formatted print](https://doc.rust-lang.org/rust-by-example/hello/print.html)

‎exercises/00_intro/intro1.rs

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// TODO: We sometimes encourage you to keep trying things on a given exercise
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// even after you already figured it out. If you got everything working and feel
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// ready for the next exercise, enter `n` in the terminal.
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//
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// The exercise file will be reloaded when you change one of the lines below!
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// Try adding a new `println!` and check the updated output in the terminal.
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fn main() {
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println!(r#" Welcome to... "#);
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println!(r#" _ _ _ "#);
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println!(r#" _ __ _ _ ___| |_| (_)_ __ __ _ ___ "#);
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println!(r#" | '__| | | / __| __| | | '_ \ / _` / __| "#);
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println!(r#" | | | |_| \__ \ |_| | | | | | (_| \__ \ "#);
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println!(r#" |_| \__,_|___/\__|_|_|_| |_|\__, |___/ "#);
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println!(r#" |___/ "#);
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println!();
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println!("This exercise compiles successfully. The remaining exercises contain a compiler");
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println!("or logic error. The central concept behind Rustlings is to fix these errors and");
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println!("solve the exercises. Good luck!");
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println!();
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println!("The file of this exercise is `exercises/00_intro/intro1.rs`. Have a look!");
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println!("The current exercise path will be always shown under the progress bar.");
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println!("You can click on the path to open the exercise file in your editor.");
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}

‎exercises/00_intro/intro2.rs

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fn main() {
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// TODO: Fix the code to print "Hello world!".
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println!("Hello world!");
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}

‎exercises/01_variables/README.md

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# Variables
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In Rust, variables are immutable by default.
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When a variable is immutable, once a value is bound to a name, you can’t change that value.
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You can make them mutable by adding `mut` in front of the variable name.
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## Further information
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- [Variables and Mutability](https://doc.rust-lang.org/book/ch03-01-variables-and-mutability.html)

‎exercises/01_variables/variables1.rs

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fn main() {
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// TODO: Add the missing keyword.
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let x = 5;
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println!("x has the value {x}");
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}

‎exercises/01_variables/variables2.rs

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fn main() {
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// TODO: Change the line below to fix the compiler error.
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let x = 10;
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if x == 10 {
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println!("x is ten!");
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} else {
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println!("x is not ten!");
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}
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}

‎exercises/01_variables/variables3.rs

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fn main() {
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// TODO: Change the line below to fix the compiler error.
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let x: i32 = 10;
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println!("Number {x}");
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}

‎exercises/01_variables/variables4.rs

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// TODO: Fix the compiler error.
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fn main() {
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let mut x = 3;
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println!("Number {x}");
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x = 5; // Don't change this line
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println!("Number {x}");
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}

‎exercises/01_variables/variables5.rs

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fn main() {
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let number = "T-H-R-E-E"; // Don't change this line
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println!("Spell a number: {}", number);
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// TODO: Fix the compiler error by changing the line below without renaming the variable.
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let number = 3;
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println!("Number plus two is: {}", number + 2);
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}

‎exercises/01_variables/variables6.rs

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// TODO: Change the line below to fix the compiler error.
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const NUMBER: i32 = 3;
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fn main() {
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println!("Number: {NUMBER}");
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}

‎exercises/02_functions/README.md

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# Functions
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Here, you'll learn how to write functions and how the Rust compiler can help you debug errors even
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in more complex code.
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## Further information
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- [How Functions Work](https://doc.rust-lang.org/book/ch03-03-how-functions-work.html)

‎exercises/02_functions/functions1.rs

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// TODO: Add some function with the name `call_me` without arguments or a return value.
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fn call_me() {
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println!("Hello, world!");
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}
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fn main() {
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call_me(); // Don't change this line
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}

‎exercises/02_functions/functions2.rs

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// TODO: Add the missing type of the argument `num` after the colon `:`.
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fn call_me(num: i32) {
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for i in 0..num {
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println!("Ring! Call number {}", i + 1);
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}
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}
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fn main() {
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call_me(3);
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}

‎exercises/02_functions/functions3.rs

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fn call_me(num: u8) {
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for i in 0..num {
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println!("Ring! Call number {}", i + 1);
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}
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}
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fn main() {
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// TODO: Fix the function call.
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call_me(3);
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}

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