Question

c语言 编写一个程序 1-1/2+1/3-1/4+1/5……-1/99+1/100

在线等！

Answer 1

#include "stdio.h"
void main()
{
int i;
float sum=0.0;
for(i=1;i<=100;i++)
{
if(i%2==0)sum-=1.0/i
else sum+=1.0/i;
}
printf("1-1/2+1/3-1/4+1/5……-1/99+1/100=%f",sum);
}

Answer 2

#include <stdio.h>
main()
{
int i,flag=1;
double sum=0;
for (i=1;i<=100;i++,flag=-flag)
sum+=(double)flag/i;
printf("野罩sum=%lf\n",sum);
getch();
}

不过森纳你的通项公式好像有点问题
最后两项应当是颂春闹
+1/99-1/100