shiyan5.2.c

C语言实验作业包

#include<stdio.h>
main()
{ int n;
  float k,y,s=0;
  scanf("%d",&n);
  for(k=1;k<=n;k++)
  { y=(1/(k+1))*(1/(k+2));
    s=s+y;
  }
  printf("sum=%f ",s);
}