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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     int op;
  5.     int a, b, c;
  6.  
  7.     if (scanf("%d", &op) != 1) {
  8.         return 1;
  9.     }
  10.  
  11.     if (op < 1 || op > 3) {
  12.         printf("不正な入力です\n");
  13.         return 0;
  14.     }
  15.  
  16.     switch (op) {
  17.         case 1:
  18.             if (scanf("%d %d", &a, &b) == 2) {
  19.                 printf("2*(%d+%d)=%d\n", a, b, 2 * (a + b));
  20.             }
  21.             break;
  22.  
  23.         case 2:
  24.             if (scanf("%d %d", &a, &b) == 2) {
  25.                 printf("%d*%d=%d\n", a, b, a * b);
  26.             }
  27.             break;
  28.  
  29.         case 3:
  30.             if (scanf("%d %d %d", &a, &b, &c) == 3) {
  31.                 printf("%d*%d*%d=%d\n", a, b, c, a * b * c);
  32.             }
  33.             break;
  34.     }
  35.  
  36.     return 0;
  37. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin
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3
2 3 4
stdout
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2*3*4=24
https://ideone.com/YwlpbC
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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