1/1+1/2+1/3+....1/n的和计算

#include "stdio.h"
int main(void){
    float value,sum=0.0;
    unsigned n=0;
	
		scanf("%f",&value);
    do
	{
        sum+=(float)1.0/++n;
    }
	while(sum<value);
    printf("%u\n",n);
    return 0;
}