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这个程序挺简单的,为什么过不了呢?

Posted by 20091845 at 2010-07-21 10:05:36 on Problem 1005 
#include<stdio.h>
#include<math.h>
#define PAI 3.1415
main()
{
	float a,b,s;int n,i=1,x;
	scanf("%d",&n);
	while(n>0)
	{
	  scanf("%f %f",&a,&b);
	  s=PAI*(a*a+b*b)/2.0;
	  x=s/50;
printf("Property %d: This property will begin eroding in year d\n",i,x+1);
	  n--;
	  i++;
	}
	printf("END OF OUTPUT.\n");
}
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