编写函数，求1+1/2+1/3+··+1/n的值，并在主函数中调用它

Answer 1

#include<stdio.h>
double fun(int n) { int i; double s=0; for ( i=1;i<=n;i++ ) s+=1.0/i; return s; }
void main()
{ int n;
scanf("%d",&n);
printf("s=%lf\n",fun(n);
}