递归1+0.5+...+1 over n

//
//  main.c
//  recursion ex.1
//
//  Created by 毛遵杰 on 2019/11/9.
//  Copyright © 2019 毛遵杰. All rights reserved.
//

#include <stdio.h>

float fac(int n)
{

    if(n==1)

        return 1;

else

return 1/fac(n)+1/fac(n-1);
}

int main(void)
{
    int num;
    scanf("%d\n",&num);

    printf("%.f",fac(num));
return 0;
}