C语言求1/1+1/2+2/3+...前n项和代码示例

#include <stdio.h>

int main() { int n, i; double a = 1, b = 1, c, sum = 0; printf('请输入项数n：'); scanf('%d', &n); for (i = 1; i <= n; i++) { c = a + b; sum += b / c; a = b; b = c; } printf('前%d项的和为：%lf', n, sum + 1); return 0; }