Create a calculator with switch statement - C Statement

C examples for Statement:switch

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Description

Create a calculator with switch statement

Demo Code

#include <stdio.h>

int main(void)
{
  double number1 = 0.0;           //* First operand value a decimal number  *//
  double number2 = 0.0;           //* Second operand value a decimal number *//
  char operation = 0;             //* Operation - must be +, -, *, /, or %  *//

  printf("\nEnter the calculation\n");
  scanf("%lf %c %lf", &number1, &operation, &number2);

  switch(operation)
  {//from  w  w w .  j  av  a2 s .  com
    case '+':                
      printf("= %lf\n", number1 + number2);
      break;

    case '-':                
      printf("= %lf\n", number1 - number2);
      break;
    case '*':                
      printf("= %lf\n", number1 * number2);
      break;

    case '/':
      if(number2 == 0)           // Check second operand for zero
        printf("\n\n\aDivision by zero error!\n");
      else
        printf("= %lf\n", number1 / number2);
      break;

    case '%':                    // Check second operand for zero
      if((long)number2 == 0)
         printf("\n\n\aDivision by zero error!\n");
      else
        printf("= %ld\n", (long)number1 % (long)number2);
      break;

    default:                     // Operation is invalid if we get to here
      printf("\n\n\aIllegal operation!\n");
      break;
  }

  return 0;
}

Result


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