in ham mashin hesab be zabane c++
#include <math.h>
#include <string.h>
int main ()
{
//declare variable
char expr;
double number1,
number2,
total;
//output to the user
cout << "This is a mini calculator.This calculator:\n"
<< "Add +\nSubtract -\nMultiply *\nDivide /\nPower ^\n"...