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  1. #include <stdio.h>
  2.  
  3. // 構造体の定義
  4. typedef struct {
  5.     int id;       // ID
  6.     float weight; // 体重
  7.     float height; // 身長
  8. } Body;
  9.  
  10. // 構造体の値を交換するswap関数
  11. void swap(Body *b, Body *c) {
  12.     Body temp = *b;
  13.     *b = *c;
  14.     *c = temp;
  15. }
  16.  
  17. int main() {
  18.     // 構造体配列の初期化
  19.     Body people[] = {
  20.         {1, 65.5, 169.0},
  21.         {2, 73.0, 170.0},
  22.         {3, 59.0, 161.0},
  23.         {4, 79.0, 175.0},
  24.         {5, 55.0, 168.0}
  25.     };
  26.  
  27.     int n = sizeof(people) / sizeof(people[0]);
  28.  
  29.     // 身長で降順ソート
  30.     for (int i = 0; i < n - 1; i++) {
  31.         for (int j = i + 1; j < n; j++) {
  32.             if (people[i].height < people[j].height) {
  33.                 swap(&people[i], &people[j]);
  34.             }
  35.         }
  36.     }
  37.  
  38.     // ソート後の出力
  39.     printf("ID, Weight, Height\n");
  40.     for (int i = 0; i < n; i++) {
  41.         printf("%d, %.1f, %.1f\n", people[i].id, people[i].weight, people[i].height);
  42.     }
  43.  
  44.     return 0;
  45. }
  46.  
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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ID, Weight, Height
4, 79.0, 175.0
2, 73.0, 170.0
1, 65.5, 169.0
5, 55.0, 168.0
3, 59.0, 161.0
https://ideone.com/P3itDr
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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