计算1/1-1/2+1/3-1/4…+1/99-1/100
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
int main()
{
int i = 0;
double sum = 0;
int flag = 1;
for (i = 1; i <= 100; i++)
{
sum += (1.0 / i)*flag;
flag = -flag;
}
printf("sum=%lf\n", sum);
system("pause");
return 0;
}
计算1/1-1/2+1/3-1/4…+1/99-1/100
#define _CRT_SECURE
阅读背景：
计算1/1-1/2+1/3-1/4......+1/99-1/100
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