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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. #define N 5
  5.  
  6. typedef struct {
  7.     int id;
  8.     int height;
  9.     int weight;
  10. } Body;
  11.  
  12. int main(void) {
  13.     Body data[N] = {
  14.         {1, 165, 60},
  15.         {2, 170, 68},
  16.         {3, 160, 50},
  17.         {4, 180, 75},
  18.         {5, 175, 80}
  19.     };
  20.  
  21.     int i, j;
  22.     Body smp;
  23.     double ave = 0.0, std = 0.0, diff = 0.0;
  24.  
  25.     for (i = 0; i < N - 1; i++) {
  26.         for (j = 0; j < N - 1 - i; j++) {
  27.             if (data[j].height > data[j + 1].height) {
  28.                 smp = data[j];
  29.                 data[j] = data[j + 1];
  30.                 data[j + 1] = smp;
  31.             }
  32.         }
  33.     }
  34.  
  35.     printf("ID  Height  Weight\n");
  36.     for (i = 0; i < N; i++) {
  37.         printf("%d  %4d  %5d\n",
  38.                data[i].id, data[i].height, data[i].weight);
  39.     }
  40.  
  41.     for (i = N - 3; i < N; i++) {
  42.         ave += data[i].height;
  43.     }
  44.     ave /= 3.0;
  45.  
  46.     for (i = N - 3; i < N; i++) {
  47.         diff = data[i].height - ave;
  48.         std += diff * diff;
  49.     }
  50.     std = sqrt(std / 3.0);
  51.  
  52.     printf("Height Average = %.1f\n", ave);
  53.     printf("Height Std = %.1f\n", std);
  54.  
  55.     return 0;
  56. }
  57.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin 
Standard input is empty
stdout 
ID  Height  Weight
3   160     50
1   165     60
2   170     68
5   175     80
4   180     75
Height Average = 175.0
Height Std = 4.1
https://ideone.com/YIYgOK
language:
C (gcc 8.3)
created:
20 hours ago
visibility:
public

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