题解 | 牛牛学数列2

#include <stdio.h>

int main()
{
	int n;
	//int arr[1000] = {0};
	scanf("%d", &n);
	float ret = 0;
	//注用int会使精度缺失
	for (float i = 1; i <= n; i++)
	{
		ret = ret + (1.0/i);
	}
	
	printf("%f",ret);
	return 0;
}