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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct {
  5.     int id;
  6.     double height;
  7.     double weight;
  8. } Body;
  9.  
  10. int main(void) {
  11.     Body data[5] = {
  12.         {1, 165.0, 60.0},
  13.         {2, 170.0, 68.0},
  14.         {3, 160.0, 50.0},
  15.         {4, 180.0, 75.0},
  16.         {5, 175.0, 80.0}
  17.     };
  18.     int n = 5;
  19.  
  20.     for (int i = 0; i < n - 1; i++) {
  21.         for (int j = 0; j < n - 1 - i; j++) {
  22.             if (data[j].height > data[j + 1].height) {
  23.                 Body temp = data[j];
  24.                 data[j] = data[j + 1];
  25.                 data[j + 1] = temp;
  26.             }
  27.         }
  28.     }
  29.  
  30.     printf("身長の低い順に整列\n");
  31.     for (int i = 0; i < n; i++) {
  32.         printf("id:%d, height:%.0f, weight:%.0f\n", data[i].id, data[i].height, data[i].weight);
  33.     }
  34.  
  35.     double sum = 0.0;
  36.     for (int i = 2; i < 5; i++) {
  37.         sum += data[i].height;
  38.     }
  39.     double ave = sum / 3.0;
  40.  
  41.     double var_sum = 0.0;
  42.     for (int i = 2; i < 5; i++) {
  43.         var_sum += (data[i].height - ave) * (data[i].height - ave);
  44.     }
  45.     double std = sqrt(var_sum / 3.0);
  46.  
  47.     printf("\n上位3名の平均値 ave = %.1f\n", ave);
  48.     printf("上位3名の標準偏差 std = %.1f\n", std);
  49.  
  50.     return 0;
  51. }
  52.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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身長の低い順に整列
id:3, height:160, weight:50
id:1, height:165, weight:60
id:2, height:170, weight:68
id:5, height:175, weight:80
id:4, height:180, weight:75

上位3名の平均値 ave = 175.0
上位3名の標準偏差 std = 4.1
https://ideone.com/AQ3ZuB
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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