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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <string.h>
  4.  
  5. typedef struct {
  6.     char name[20];
  7.     int age;
  8.     double height;
  9. } Body;
  10.  
  11. int main(void) {
  12.     Body data[] = {
  13.         {"Tanaka", 20, 170.2},
  14.         {"Suzuki", 19, 165.8},
  15.         {"Yamada", 22, 180.4},
  16.         {"Sato", 21, 175.3},
  17.         {"Kobayashi", 20, 169.0}
  18.     };
  19.     int n = sizeof(data) / sizeof(data[0]);
  20.  
  21.     for (int i = 0; i < n - 1; i++) {
  22.         for (int j = i + 1; j < n; j++) {
  23.             if (data[i].height > data[j].height) {
  24.                 Body temp = data[i];
  25.                 data[i] = data[j];
  26.                 data[j] = temp;
  27.             }
  28.         }
  29.     }
  30.  
  31.     printf("【整列結果】\n");
  32.     for (int i = 0; i < n; i++) {
  33.         printf("%-10s %2d歳  %.1fcm\n", data[i].name, data[i].age, data[i].height);
  34.     }
  35.  
  36.     double sum = 0.0;
  37.     for (int i = n - 3; i < n; i++) {
  38.         sum += data[i].height;
  39.     }
  40.     double ave = sum / 3.0;
  41.  
  42.     double var = 0.0;
  43.     for (int i = n - 3; i < n; i++) {
  44.         var += pow(data[i].height - ave, 2);
  45.     }
  46.     double std = sqrt(var / 3.0);
  47.  
  48.     printf("\n上位3名の平均身長：%.1fcm\n", ave);
  49.     printf("上位3名の標準偏差：%.1fcm\n", std);
  50.  
  51.     return 0;
  52. }
  53.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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【整列結果】
Suzuki     19歳  165.8cm
Kobayashi  20歳  169.0cm
Tanaka     20歳  170.2cm
Sato       21歳  175.3cm
Yamada     22歳  180.4cm

上位3名の平均身長：175.3cm
上位3名の標準偏差：4.2cm
https://ideone.com/2VP3NV
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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