查了n页字典终于明白
#include "stdio.h"
main()
{int n,i,j,z;
 float area,t=3.14,x,y;
 scanf("%d",&n);
 for(i=0;i<n;i++)
    {z=0;
     scanf("%f",&x);
     scanf("%f",&y);
     area=t*(x*x+y*y)/2.0;
     while(area>50)
        {area=area-50;
        	z=z+1;
     }   
     printf ("Property %d: This property will begin eroding in year %d.\n",i+1,z+1);}
    printf("END OF OUTPUT.\n");

}

• GDOU ? (7) 150014 2008-05-29 20:44:54