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  1. // Program to create a simple calculator
  2. // Performs addition, subtraction, multiplication or division depending the input from user
  3.  
  4. # include <stdio.h>
  5.  
  6. int main() {
  7.  
  8.     char operator;
  9.     double firstNumber,secondNumber;
  10.  
  11.     printf("Enter an operator (+, -, *, /): ");
  12.     scanf("%c", &operator);
  13.  
  14.     printf("Enter two operands: ");
  15.     scanf("%lf %lf",&firstNumber, &secondNumber);
  16.  
  17.     switch(operator)
  18.     {
  19.         case '+':
  20.             printf("%.1lf + %.1lf = %.1lf",firstNumber, secondNumber, firstNumber+secondNumber);
  21.             break;
  22.  
  23.         case '-':
  24.             printf("%.1lf - %.1lf = %.1lf",firstNumber, secondNumber, firstNumber-secondNumber);
  25.             break;
  26.  
  27.         case '*':
  28.             printf("%.1lf * %.1lf = %.1lf",firstNumber, secondNumber, firstNumber*secondNumber);
  29.             break;
  30.  
  31.         case '/':
  32.             printf("%.1lf / %.1lf = %.1lf",firstNumber, secondNumber, firstNumber/firstNumber);
  33.             break;
  34.  
  35.         // operator is doesn't match any case constant (+, -, *, /)
  36.         default:
  37.             printf("Error! operator is not correct");
  38.     }
  39.  
  40.     return 0;
  41. }
Success #stdin #stdout 0s 9432KB
comments (?)
stdin
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+
50 60
stdout
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Enter an operator (+, -, *, /): Enter two operands: 50.0 + 60.0 = 110.0
https://ideone.com/Q0fZjS
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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