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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. #include<math.h>
  4. #include<time.h>
  5.  
  6.  
  7.  
  8.  
  9. double randnum();
  10.  
  11. int main(void) {
  12. 	int n, m, f, i, j;
  13. 	double x;
  14. 	srand((unsigned)time(NULL));
  15. 	m = 0;
  16. 	f = 0;
  17.  
  18.  
  19.  
  20. 	//scanf("%d", &n);
  21. 	n = 1000000000000000000000000000;
  22. 		printf("夫婦の組数=%d",n);
  23. 	for (i = 0;i < n;i++) {
  24. 		for (j = 0;j < 1000;j++) {
  25. 			x = randnum();
  26. 			if (x <= 0.500)
  27. 			{
  28. 				f++;
  29. 			}
  30. 			else {
  31. 				m++;
  32. 				break;
  33. 			}
  34. 		}
  35.  
  36.  
  37.  
  38. 	}
  39.  
  40. 	printf("boy=%d,girl=%d born\n", m, f);
  41. 	printf("比率は%f\n", (double)m/(m+f));
  42. 	return 0;
  43.  
  44. }
  45. double randnum() {
  46. 	double b;
  47. 	b = (rand() + 0.5) / (RAND_MAX + 1.0);
  48. 	return b;
  49. }
  50.  
  51.  
  52.  
Success #stdin #stdout 0s 9432KB
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Standard input is empty
stdout
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夫婦の組数=-402653184boy=0,girl=0 born
比率は-nan
https://ideone.com/GwgQ4v
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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