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  1. #include <iostream>
  2. #include <cstdlib>
  3. #include <ctime>
  4. using namespace std;
  5.  
  6. int main() {
  7.  
  8. 	srand(time(0));
  9.  
  10. 	int N = 100000;
  11. 	int m = 0;
  12. 	for (int i = 1; i <= N; i++) {
  13.  
  14. 		double x = (double) rand() / RAND_MAX;
  15. 		double y = (double) rand() / RAND_MAX;
  16.  
  17. 		if (x * x + y * y < 1) {
  18. 			m++;
  19. 		}
  20.  
  21. 	}
  22.  
  23. 	cout << "pi ~ " << 4.0 * m / N << endl;
  24.  
  25. 	return 0;
  26. }
Success #stdin #stdout 0s 4588KB
comments (?)
stdin 
Standard input is empty
stdout 
pi ~ 3.14552
https://ideone.com/5wj3zT
蒙地卡羅法球拍
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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