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  1. #include<stdio.h>
  2.  
  3. int A, B, choice, Add, minus, multi;
  4.  
  5. int main() {
  6.  
  7.     printf("Welcome to the program:\n 1. Add\n 2. Minus\n 3. Multiply\n");
  8.  
  9.     printf("Input choice (1-3): ");
  10.     scanf("%d", &choice);
  11.  
  12.     if (choice == 1) {
  13.         printf("Input A: ");
  14.         scanf("%d", &A);
  15.  
  16.         printf("Input B: ");
  17.         scanf("%d", &B);
  18.  
  19.         Add = A + B;
  20.         printf("A + B = %d", Add);
  21.     } 
  22.     else if (choice == 2) {
  23.         printf("Input A: ");
  24.         scanf("%d", &A);
  25.  
  26.         printf("Input B: ");
  27.         scanf("%d", &B);
  28.  
  29.         minus = A - B;
  30.         printf("A - B = %d", minus);
  31.     } 
  32.     else if (choice == 3) {
  33.         printf("Input A: ");
  34.         scanf("%d", &A);
  35.  
  36.         printf("Input B: ");
  37.         scanf("%d", &B);
  38.  
  39.         multi = A * B;
  40.         printf("A * B = %d", multi);
  41.     } 
  42.     else {
  43.         printf("Error! Please input 1-3 only.");
  44.     }
  45.  
  46.     printf("\nProgram by Warathip Woraphong M.5/2 No.30");
  47.  
  48.     return 0;
  49. }
Success #stdin #stdout 0s 5288KB
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stdin
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Standard input is empty
stdout
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Welcome to the program:
 1. Add
 2. Minus
 3. Multiply
Input choice (1-3): Error! Please input 1-3 only.
Program by Warathip Woraphong M.5/2 No.30
https://ideone.com/g8L7zp
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

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