POJ-1003: hangover 详解1：递减法

#include "stdio.h"

int main(void)
{
    float len = 0.0 ;
    int count = 0 ;

    while(1)
    {
        scanf("%f", &len) ;
        if(len == 0.00)
            break ;

        count = 0 ;
        while(len > 0)
        {
            count++ ;
            len -= (float)1 / (count+1) ;
        }
        printf("%d card(s)\r\n", count) ;
    }

    return 0 ;
}