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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct {
  5.     int id;
  6.     int height;
  7.     int weight;
  8. } Body;
  9.  
  10. int main(void) {
  11.     Body data[5] = {
  12.         {1, 165, 60},
  13.         {2, 170, 68},
  14.         {3, 160, 50},
  15.         {4, 180, 75},
  16.         {5, 175, 80}
  17.     };
  18.  
  19.     int i, j;
  20.     Body temp;
  21.  
  22.     for (i = 0; i < 5 - 1; i++) {
  23.         for (j = 0; j < 5 - 1 - i; j++) {
  24.             if (data[j].height > data[j + 1].height) {
  25.                 temp = data[j];
  26.                 data[j] = data[j + 1];
  27.                 data[j + 1] = temp;
  28.             }
  29.         }
  30.     }
  31.  
  32.     printf("id\tweight[kg]\n");
  33.     for (i = 0; i < 5; i++) {
  34.         printf("%d\t%d\t%d\n", data[i].id, data[i].height, data[i].weight);
  35.     }
  36.  
  37.     double sum = 0;
  38.     for (i = 2; i < 5; i++) {
  39.         sum += data[i].height;
  40.     }
  41.     double ave = sum / 3.0;
  42.  
  43.     double variance_sum = 0;
  44.     for (i = 2; i < 5; i++) {
  45.         variance_sum += pow(data[i].height - ave, 2);
  46.     }
  47.     double std = sqrt(variance_sum / 3.0);
  48.  
  49.     printf("平均値(ave): %.1f\n", ave);
  50.     printf("標準偏差(std): %.1f\n", std);
  51.  
  52.     return 0;
  53. }
Success #stdin #stdout 0s 5288KB
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stdin
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Standard input is empty
stdout
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id	weight[kg]
3	160	50
1	165	60
2	170	68
5	175	80
4	180	75
平均値(ave): 175.0
標準偏差(std): 4.1
https://ideone.com/28x5sV
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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