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  1. #include <stdio.h>
  2. #include <math.h>
  3. typedef struct{
  4. 	int id;
  5. 	int height;
  6. 	int weight;
  7. }Body;
  8.  
  9. int main()
  10. {
  11. 	int n=5;
  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. for(int i=0; i<=n-1;i++){
  22. 	for(int j=0; j<n-1; j++){
  23. 		if(data[j].height > data[j+1].height){
  24. 			Body temp =data[j];
  25. 			data[j]=data[j+1];
  26. 			data[j+1]=temp;
  27. 		}
  28. 	}
  29. }
  30.  
  31.     printf("身長の低い順 :\n");
  32.     for (int i = 0; i < n; i++) {
  33.         printf("ID: %d, Height: %d, Weight: %d\n", data[i].id, data[i].height, data[i].weight);
  34.     }
  35. double sum = 0.0;
  36.     for (int i = n - 3; i < n; i++) {
  37.     	//n-3からnまでの3つの数を3で割る
  38.         sum += data[i].height;
  39.     }
  40.     double ave = sum / 3.0;
  41.  
  42.     double variance = 0.0;
  43.     for (int i = n - 3; i < n; i++) {
  44.         variance += pow(data[i].height - ave, 2);
  45.         //偏差を出してpowはその差を2乗する
  46.     }
  47.     double std = sqrt(variance / 3.0);
  48.  // 分散を数で割ったものが標準偏差
  49.     printf("\n平均身長: %.1f cm\n", ave);
  50.     printf("標準偏差: %.1f cm\n", std);
  51.  
  52.  return 0;
  53. }
  54.  
Success #stdin #stdout 0s 5316KB
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stdin
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Standard input is empty
stdout
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身長の低い順 :
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

平均身長: 175.0 cm
標準偏差: 4.1 cm
https://ideone.com/JE9Fnn
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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