Create an interactive calculator. - C Statement

Description

Create an interactive calculator.

Demo Code

#include <stdio.h>
#include <stdbool.h>

int main(void) {
   double accumulator = 0.0;
   double number;
   char operator1;
   bool isCalculating = true;

   while (isCalculating) {
      scanf("%lf %c", &number, &operator1);

      switch (operator1) {
      case '+':
         accumulator += number;//from www. ja v  a2s. c  o m
         break;
      case '-':
         accumulator -= number;
         break;
      case '*':
         accumulator *= number;
         break;
      case '/':
         if (number == 0)
            printf("ERROR: Division by 0 is not allowed!");
         else
            accumulator /= number;
         break;
      case 'S':
         accumulator = number;
         break;
      case 'E':
         isCalculating = false;
         break;
      default:
         printf("ERROR: Unknown operator!\n");
         break;
      }
      printf("= %f\n", accumulator);
   }
   return 0;
}

Result

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