用随机数计算π值

#include <stdio.h>#include <stdlib.h>#include <time.h>int main() {    srand(time(0));    double x, y, pi;    long int i, n, cnt = 0;    printf("Input>");    scanf("%ld", &n);    for (int i = 0; i <= n; i++) {        x = (double)rand() / RAND_MAX * 2.0;        y = (double)rand() / RAND_MAX * 2.0;        printf("x=%lf, y=%lf\n", x, y);        if ((x - 1.0) * (x - 1.0) + (y - 1.0) * (y - 1.0)            cnt++;        pi = 4.0 * cnt / i;        printf("cnt=%ld, n=%ld, pi=%lf\n", cnt, i, pi);    }    return 0;}