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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]={{ 1, 165, 60},
  12.                   { 2, 170, 68},
  13.                   { 3, 160, 50},
  14.                   { 4, 180, 75},
  15.                   { 5, 175, 80}};
  16.  
  17.     for(int i=0; i<5-1; i++){
  18.         for(int j=i+1; j<5; j++){
  19.             if(data[i].height > data[j].height){
  20.                 Body tmp=data[i];
  21.                 data[i]=data[j];
  22.                 data[j]=tmp;
  23.             }
  24.         }
  25.     }
  26.  
  27.     printf("id  height  weight\n");
  28.     for (int i=0; i<5; i++){
  29.         printf("%d %.0f %.0f\n", data[i].id, data[i].height, data[i].weight);
  30.     }
  31.  
  32.     double sum=0.0;
  33.     for(int i=2; i<5; i++) sum += data[i].height;
  34.     double ave=sum/3.0;
  35.  
  36.     double var=0.0;
  37.     for(int i=2; i<5; i++) var += pow(data[i].height - ave, 2);
  38.     double std=sqrt(var / 3.0);
  39.  
  40.     printf("\nAverage height (top 3): %.1f cm\n", ave);
  41.     printf("Standard deviation: %.1f cm\n", std);
  42.  
  43.     return 0;
  44. }
  45.  
Success #stdin #stdout 0.01s 5308KB
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 cm
https://ideone.com/JL29xJ
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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