xjq+1

README.md

@@ -1,4 +1,5 @@
-# c2019
+# 大一c语言作业
+#c2019
 
 ## 基本操作流程
 

level1/p01_runningLetter/main.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <windows.h>
+#define N 78
+unsigned int sleep(unsigned int seconds);
+int main()
+{
+    int i,j;
+    while(1)
+    {
+        for(i=0;i<N;i++)
+        {
+            for(j = 0;j <= i;j++)
+            {
+                printf(" ");
+            }
+            printf("s");
+            Sleep(50);
+            system("cls");
+        }
+        for(i=N;i>0;i--)
+        {
+            for(j = 0;j <= i;j++)
+            {
+                printf(" ");
+            }
+            printf("s");
+            Sleep(100);
+            system("cls");
+        }
+    }
+    return 0;
+}

level1/p02_isPrime/sushu.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+int main()
+{
+    int num,i,count = 0;
+    printf("input a number:");
+    scanf("%d",&num);
+    if(num <= 0)
+    {
+        printf("error!input again:");//��������һ��������
+        scanf("%d",&num);
+    }
+    else if(num == 1)
+    {
+        printf("N");                 //1��������
+    }
+    else if(num == 2)
+    {
+        printf("Y");                 //2������
+    }
+    else
+    {
+    for(i = 2;i < num;i++)
+    {
+        if(num%i == 0)
+        {
+            printf("N");             //��������
+            break;
+        }
+        else
+        {
+            count++;
+        }
+    }
+    if(count == (num - 2))
+        printf("Y");                 //������
+    }
+    return 0;
+}

level1/p03_Diophantus/diufantu.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+//1/6x+1/12x+1/7x+5+1/2x+4=x
+//ת��Ϊ14x+7x+12x+5*84+42x+4*84=84x
+int main()
+{
+    int i;
+    for(i = 0;i < 200;i++)           //0-150ÿ����Ͷ����ԣ��ܻ�������ꡣ
+    {
+        if(14*i + 7*i + 12*i + 5*84 + 42*i + 4*84 == 84*i)
+            break;
+    }
+    printf("year = %d",i);
+    return 0;
+}

level1/p04_ narcissus/shuixian.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+int main()
+{
+    int a,b,c,i,num;
+
+    for(i=100;i<1000;i++)
+    {
+        num = i;
+        a=num%10;
+        num /= 10;
+        b=num%10;
+        num /= 10;
+        c = num;
+        if(i == (pow(a,3)+pow(b,3)+pow(c,3)))
+        {
+            printf("%d\n",i);
+        }
+    }
+    return 0;
+}

level1/p05_allPrimes/allprimes.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+int main()
+{
+       clock_t start, finish;
+       double cost;
+       int i,j;
+       start=clock();
+       printf("allPrimes:\n\n2  3  5  7  ");
+       for(i=5;i<1000;i += 2)
+       {
+           int count = 3;
+           for(j=3;j<i;j++)
+           {
+               if(i%j==0||i%3 == 0||i% 5==0||i%7==0)
+                break;
+               else
+                count++;
+           }
+           if(i == count)
+            printf("%-3d ",i);
+       }
+       printf("\n\n");
+       finish = clock();
+       cost = (double)(finish-start)/CLOCKS_PER_SEC;
+       printf("cost time : %lfs",cost);
+    return 0;
+}

level1/p06_Goldbach/newGoldbach.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+int main()
+{
+    int i,j,x,k;
+    int num ;
+    int primes[25]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97};
+    for(i = 4;i < 100;i += 2)
+    {
+
+        for(j = 0;j < 25;j++)
+        {
+            num = 0;
+            x = i - primes[j];
+            for(k = 0;k<25;k++)
+            {
+                if(x==primes[k])
+                    num = 1;
+            }
+            if(!(x<2||num == 0||primes[j]>x))
+                printf("%-3d= %-3d+ %-3d\n",i,primes[j],x);
+        }
+    }
+    return 0;
+}
+

level1/p07_encrypt_decrypt/jiamitijiao.c

@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define N 5      //��Կ
+int main()
+{
+    char password[50];
+    int i,count;
+    printf("��������Ҫ���ܵ����룺");
+    gets(password);
+    count = strlen(password);
+    for(i = 0;i < count;i++)
+    {
+        password[i] = password[i] + i + N;
+    }
+    system("cls");
+    printf("���ܺ������Ϊ��%s\n",password);
+    printf("���������������\n");
+    system("pause");
+    for(i = 0;i < count;i++)
+    {
+        password[i] = password[i] - i - N;
+    }
+    printf("���ܺ������ǣ�%s",password);
+    return 0;
+}

level1/p08_hanoi/hanoi.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <math.h>
+void hanoi(int,char,char,char);
+int main()
+{
+    int n;
+    printf("������Բ�̸�����");
+    scanf("%d",&n);
+    hanoi(n,'A','B','C');
+    int count = pow(2,n) - 1;
+    printf("һ����Ҫ%d����",count);
+    return 0;
+}
+void hanoi(int n,char a,char b,char c)
+{
+    if(n == 1)
+        printf("%c-->%c\n",a,c);
+    else
+    {
+        hanoi(n - 1,a,c,b);
+        printf("%c-->%c\n",a,c);
+        hanoi(n - 1,b,a,c);
+    }
+}

level1/p09_maze/main.c

@@ -0,0 +1,170 @@
+#include <stdio.h>
+#include <conio.h>
+#include <windows.h>
+#include <time.h>
+#define Height 25 //�Թ��ĸ߶ȣ�����Ϊ����
+#define Width 25 //�Թ��Ŀ��ȣ�����Ϊ����
+#define Wall 1
+#define Road 0
+#define Start 2
+#define End 3
+#define Esc 5
+#define Up 1
+#define Down 2
+#define Left 3
+#define Right 4
+int map[Height+2][Width+2];
+void gotoxy(int x,int y) //�ƶ�����
+{
+    COORD coord;
+    coord.X=x;
+    coord.Y=y;
+    SetConsoleCursorPosition( GetStdHandle( STD_OUTPUT_HANDLE ), coord );
+}
+void hidden()//���ع��
+{
+    HANDLE hOut = GetStdHandle(STD_OUTPUT_HANDLE);
+    CONSOLE_CURSOR_INFO cci;
+    GetConsoleCursorInfo(hOut,&cci);
+    cci.bVisible=0;//��1Ϊ��ʾ����0Ϊ����
+    SetConsoleCursorInfo(hOut,&cci);
+}
+void create(int x,int y) //��������Թ�
+{
+    int c[4][2]={0,1,1,0,0,-1,-1,0}; //�ĸ�����
+    int i,j,t;
+        //���������
+    for(i=0;i<4;i++)
+    {
+        j=rand()%4;
+        t=c[i][0];c[i][0]=c[j][0];c[j][0]=t;
+        t=c[i][1];c[i][1]=c[j][1];c[j][1]=t;
+    }
+    map[x][y]=Road;
+    for(i=0;i<4;i++)
+    if(map[x+2*c[i][0]][y+2*c[i][1]]==Wall)
+    {
+        map[x+c[i][0]][y+c[i][1]]=Road;
+        create(x+2*c[i][0],y+2*c[i][1]);
+    }
+}
+int get_key() //���հ���
+{
+    char c;
+    while(c=getch())
+    {
+        if(c==27) return Esc; //Esc
+        if(c!=-32)continue;
+        c=getch();
+        if(c==72) return Up; //��
+        if(c==80) return Down; //��
+        if(c==75) return Left; //��
+        if(c==77) return Right; //��
+    }
+    return 0;
+}
+void paint(int x,int y) //���Թ�
+{
+    gotoxy(2*y-2,x-1);
+    switch(map[x][y])
+    {
+        case Start:
+        printf("��");break; //�����
+        case End:
+        printf("��");break; //������
+        case Wall:
+        printf("�~");break; //��ǽ
+        case Road:
+        printf(" ");break; //��·
+    }
+}
+void game()
+{
+    int x=2,y=1;    //��ҵ�ǰλ�ã��տ�ʼ����ڴ�
+    int c;          //�������հ���
+    while(1)
+    {
+        gotoxy(2*y-2,x-1);
+        printf("��"); //������ҵ�ǰλ��
+        if(map[x][y]==End) //�ж��Ƿ񵽴����
+        {
+            gotoxy(30,24);
+            printf("�����յ㣬�����������");
+            getch();
+            break;
+        }
+        c=get_key();
+        if(c==Esc)
+        {
+            gotoxy(0,24);
+            break;
+        }
+        switch(c)
+        {
+                case Up: //������
+                if(map[x-1][y]!=Wall)
+                {
+                    paint(x,y);
+                    x--;
+                }
+            break;
+            case Down: //������
+            if(map[x+1][y]!=Wall)
+            {
+                paint(x,y);
+                x++;
+            }
+            break;
+            case Left: //������
+            if(map[x][y-1]!=Wall)
+            {
+                paint(x,y);
+                y--;
+            }
+            break;
+            case Right: //������
+            if(map[x][y+1]!=Wall)
+            {
+                paint(x,y);
+                y++;
+            }
+            break;
+        }
+    }
+}
+int main()
+{
+	system("title yourname");
+    int i,j;
+    srand((unsigned)time(NULL)); //��ʼ���漴����
+    hidden(); //���ع��
+    for(i=0;i<=Height+1;i++)
+    for(j=0;j<=Width+1;j++)
+    if(i==0||i==Height+1||j==0||j==Width+1) //��ʼ���Թ�
+    map[i][j]=Road;
+    else map[i][j]=Wall;
+
+    create(2*(rand()%(Height/2)+1),2*(rand()%(Width/2)+1)); //�����һ���㿪ʼ�����Թ����õ����ж�Ϊż��
+    for(i=0;i<=Height+1;i++) //�߽紦��
+    {
+        map[i][0]=Wall;
+        map[i][Width+1]=Wall;
+    }
+
+    for(j=0;j<=Width+1;j++) //�߽紦��
+    {
+        map[0][j]=Wall;
+        map[Height+1][j]=Wall;
+    }
+    map[2][1]=Start; //�������
+    map[Height-1][Width]=End; //��������
+    for(i=1;i<=Height;i++)
+    {
+        for(j=1;j<=Width;j++) //�����Թ�
+            paint(i,j);
+    }
+    game(); //��ʼ��Ϸ
+    getch();
+    return 0;
+}
+