代码如下：
#include <stdio.h>
main()
{  int sign=1;
   float deno=2.0,sum=1.0,term;
     while (deno<=100)
       {  sign=-sign;
          term=sign/deno;
          sum=sum+term;
          deno=deno+1;
          }
     printf ("%d",sum);
     getch ();
  }