第一题.txt.txt

来自「hitorMiss＋用概率算法求积分问题的C程序」· 文本 代码 · 共 31 行

#include"stdio.h"
#include"stdlib.h"
#include"time.h"

double uniform();
double darts(int);

void main(){
	double pie = darts(10000000);
	printf("%f",pie);

}

double darts(int n){
	int k = 0;
	srand( (unsigned)time( NULL ) );
	
	for(int i = 1; i <= n; i++){
		double x = uniform();
		double y = x;
		if((x*x+y*y)<=1)
			k++;
	}
	return 4*(double)k/(double)n;
}

double uniform(){
	int j = rand();
	double k = ((double)j) / ((double)RAND_MAX);
	return k;
}