98.根据公式求值

函数fun的功能是：求S的值。S=(2k)*（2k）/(2k-1)(2k+1).

#define _CRT_SECURE_NO_WARNINGS#include<stdio.h>#include<math.h>double fun(int k){int n;double s, w, q, p;n = 1;s = 1.0;while (n <= k){w = 2.0*n;p = w - 1.0;q = w + 1.0;s = s*w*w / p / q;n++;}return s;}int main(){printf("%lf\n", fun(10));system("pause");return 0;}