C语言：1-1/2+1/3-1/4+1/5.....+1/99-1/100

//  1-1/2+1/3-1/4+1/5.....+1/99-1/100#include<stdio.h>#include<stdlib.h>#include<math.h>int main(){int n = 100;int i = 0;float sum = 0;for (i = 1; i <= 100; i++){sum = sum + pow(-1,i-1)*(1.0 / i);}printf("sum = %f\n", sum);system("pause");return 0;}