计算1 / 1

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<windows.h>
int main()
{
float  k = 0,sum = 0,j = 0, i = -1;


{
for (j = 1; j <= 100; j++)
{
i = -i;
k = i / j;
sum = sum + k;
}
}
printf("%f\n",sum);
  system("pause");


  return 0;


}