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  1.  
  2. #include <stdio.h>
  3. #include <math.h>  
  4.  
  5. typedef struct {
  6.     int id;
  7.     double height;
  8.     double weight;
  9. } Body;
  10.  
  11. void sortByHeight(Body data[], int n) {
  12.     for(int i = 0; i < n - 1; i++) {
  13.         for(int j = i + 1; j < n; j++) {
  14.             if(data[i].height > data[j].height) {
  15.                 Body temp = data[i];
  16.                 data[i] = data[j];
  17.                 data[j] = temp;
  18.             }
  19.         }
  20.     }
  21. }
  22.  
  23. int main(void) {
  24.     Body data[5] = {
  25.         {1, 165, 60},
  26.         {2, 170, 68},
  27.         {3, 160, 50},
  28.         {4, 180, 75},
  29.         {5, 175, 80}
  30.     };
  31.  
  32.     int n = 5;
  33.  
  34.     sortByHeight(data, n);
  35.  
  36.     printf("ID\tHeight\tWeight\n");
  37.     for(int i = 0; i < n; i++) {
  38.         printf("%d\t%.0f\t%.0f\n", data[i].id, data[i].height, data[i].weight);
  39.     }
  40.  
  41.     double ave = 0.0, std = 0.0;
  42.     for(int i = n - 3; i < n; i++) {
  43.         ave += data[i].height;
  44.     }
  45.     ave /= 3;
  46.  
  47.     for(int i = n - 3; i < n; i++) {
  48.         std += pow(data[i].height - ave, 2);
  49.     }
  50.     std = sqrt(std / 3);
  51.  
  52.     printf("\nAverage height (top 3): %.1f cm\n", ave);
  53.     printf("Standard deviation: %.1f\n", std);
  54.  
  55.     return 0;
  56. }
  57.  
Success #stdin #stdout 0s 5312KB
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

Average height (top 3): 175.0 cm
Standard deviation: 4.1
https://ideone.com/s83uSB
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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