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  1. #include <stdio.h>
  2.  
  3. int cmp(int x, int y)
  4. {
  5.     return x > y;
  6. }
  7.  
  8. void swap(int *x, int *y)
  9. {
  10.     int tmp = *x;
  11.     *x = *y;
  12.     *y = tmp;
  13. }
  14.  
  15. int main(void)
  16. {
  17.     int a[] = {3, 1, 4, 1, 5, 9, 2, 6, 5};
  18.     size_t n = sizeof a / sizeof a[0];
  19.  
  20.     size_t swap_count = 0;
  21.  
  22.     for (size_t i = 0; i < n - 1; ++i) {
  23.         int swapped = 0;
  24.  
  25.         for (size_t j = 0; j < n - 1 - i; ++j) {
  26.             if (cmp(a[j], a[j + 1])) {
  27.                 swap(&a[j], &a[j + 1]);
  28.                 swap_count++;
  29.                 swapped = 1;
  30.             }
  31.         }
  32.  
  33.         if (swapped == 0) {
  34.             break;
  35.         }
  36.     }
  37.  
  38.     for (size_t i = 0; i < n; ++i) {
  39.         printf("%d ", a[i]);
  40.     }
  41.     printf("\n");
  42.  
  43.     printf("swap関数の呼び出し回数: %zu回\n", swap_count);
  44.  
  45.     return 0;
  46. }
  47.  
  48.  
Success #stdin #stdout 0s 5340KB
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Standard input is empty
stdout
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1 1 2 3 4 5 5 6 9 
swap関数の呼び出し回数: 10回
https://ideone.com/MPeCkv
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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