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请大家帮忙改一下, 为什么不停的运行呢?

Posted by piaofushi919 at 2004-11-24 08:38:25 on Problem 1003
#include <stdio.h>
#include <math.h>
void main()
{
	float a,sum;
    int n,c;
	while (a!=0.00)
	{
		scanf("%.2f",&a);
		c=0;
		sum=0;
		for(n=2;n<67;n++)
		{
	        if (sum<a)
				sum+=1/n;
				c=c+1;
			if(sum>a)
				break;
		}
		printf("%d\n card(s)",c);
	}
}

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