Arduino Advance Calculator

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This is an advance calculator library for Arduino like devices. It uses infix evaluation method and some error handling method to calculate.

Calculator.h

calculator.getans() function takes an char array as input and outputs the ans with a structure of type

struct calculatordata {
  uint8_t error;
  double  ans;
};

where error holds error of input array if any, and ans holds the answer.

which can be accessed by calculation_data object from calculator class.

Syntex

All the basic algebric syntex is same except some.

Syntex	Uses	example
+, -, * , /	General purpose	2+3, (2/3.5*(66+-9.8)) or 29(5+2)(35)
^	For calulating exponent.	2^5 or 2^(25-6).
sqrt	For calculating square root(√) of a number.	sqrt(5) or sqrt5
logn(a)	For calculating log. Immediate number used after log will be considerd as base.	log2(3), base is 2 or loge(6) base is e.
sin(), cos(), tan(), asin(), acos(), atan()	For trigonomitric calculation and input value will be taken as **DEGREE**	cos(45) , cos45, sin(45+60). But equation like sin45+60 will bw considered as sin(45)+60.

ERROR

Library can handle inputs like:

• (2+++3), (2---3) or (2+--+3) and decides final operation according to algebric laws.
• Unequal numbers of opening and closing bracket like (2-3(5) will be considered as error.
• Any kind of Error will be reported through calculator_data.error which can be:
  1. Syntex_Error for any syntactic error.
  2. Math_Error for any kind of undefined number or operation.