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  1.  
  2. #include <stdio.h>
  3.  
  4. int main() {
  5.     int a, b, c;
  6.     char ch;
  7.  
  8.     printf("Enter first integer: \n");
  9.     scanf("%d", &a) ;
  10.  
  11.     printf("Enter second integer: \n ");
  12.     scanf("%d", &b)  ;
  13.  
  14.     printf("Enter operand (+, -, *, /): \n ");
  15.     scanf(" %c", &ch); // space before %c to skip whitespace
  16.  
  17.     switch (ch) {
  18.         case '+':
  19.             c = a + b;
  20.             printf("User wants addition: %d\n", c);
  21.             break;
  22.         case '-':
  23.             c = a - b;
  24.             printf("User wants subtraction: %d\n", c);
  25.             break;
  26.         case '*':
  27.             c = a * b;
  28.             printf("User wants multiplication: %d\n", c);
  29.             break;
  30.         case '/':
  31.             if (b != 0) {
  32.                 c = a / b;
  33.                 printf("User wants division: %d\n", c);
  34.             } else {
  35.                 printf("Error: Division by zero is not allowed.\n");
  36.             }
  37.             break;
  38.         default:
  39.             printf("Invalid operator.\n");
  40.     }
  41.  
  42.     return 0;
  43. }
  44.  
  45.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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9
4
-
stdout
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Enter first integer: 
Enter second integer: 
 Enter operand (+, -, *, /): 
 User wants subtraction: 5
https://ideone.com/yuCko5
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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