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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4.  
  5. int main() {
  6.     int heads_count[4] = {0, 0, 0, 0};
  7.     int trials = 100000;
  8.     int i, j;
  9.  
  10.     srand(time(NULL));
  11.  
  12.     for (i = 0; i < trials; i++) {
  13.         int heads = 0;
  14.  
  15.         for (j = 0; j < 3; j++) {
  16.             if (rand() % 2 == 1) {
  17.                 heads++;
  18.             }
  19.         }
  20.  
  21.         heads_count[heads]++;
  22.     }
  23.  
  24.     printf("表が出た枚数のヒストグラム:\n");
  25.     printf("0枚の表: %d回\n", heads_count[0]);
  26.     printf("1枚の表: %d回\n", heads_count[1]);
  27.     printf("2枚の表: %d回\n", heads_count[2]);
  28.     printf("3枚の表: %d回\n", heads_count[3]);
  29.  
  30.     return 0;
  31. }
  32.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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stdout
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表が出た枚数のヒストグラム:
0枚の表: 12585回
1枚の表: 37438回
2枚の表: 37312回
3枚の表: 12665回
https://ideone.com/OhPQXT
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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