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  1.  
  2. #include <stdio.h>
  3. #include <math.h>
  4.  
  5. typedef struct {
  6.     int id;
  7.     int height;
  8.     int weight;
  9. } Body;
  10.  
  11. int main(void)
  12. {
  13.     Body data[5] = {
  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 temp;
  23.     double ave = 0.0;
  24.     double std = 0.0;
  25.  
  26.     for (i = 0; i < 5 - 1; i++) {
  27.         for (j = 0; j < 5 - 1 - i; j++) {
  28.             if (data[j].height > data[j + 1].height) {
  29.                 temp = data[j];
  30.                 data[j] = data[j + 1];
  31.                 data[j + 1] = temp;
  32.             }
  33.         }
  34.     }
  35.  
  36.     printf("id height weight\n");
  37.     for (i = 0; i < 5; i++) {
  38.         printf("%2d %6d %6d\n",
  39.                data[i].id,
  40.                data[i].height,
  41.                data[i].weight);
  42.     }
  43.  
  44.     for (i = 2; i < 5; i++) {
  45.         ave += data[i].height;
  46.     }
  47.     ave /= 3.0;
  48.  
  49.     for (i = 2; i < 5; i++) {
  50.         std += (data[i].height - ave)
  51.              * (data[i].height - ave);
  52.     }
  53.     std = sqrt(std / 3.0);
  54.  
  55.     printf("ave = %.1f\n", ave);
  56.     printf("std = %.1f\n", std);
  57.  
  58.     return 0;
  59. }
  60.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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id height weight
 3    160     50
 1    165     60
 2    170     68
 5    175     80
 4    180     75
ave = 175.0
std = 4.1
https://ideone.com/TLPQ6J
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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