> #include <stdio.h>
> #include <stdlib.h>
> #include <math.h>
> #define PI 3.141592654
> 
> int main()
> {
>     int N;
>     scanf(" %d \n", &N);
>     int i;
>     int year[N];
>     double x[N];
>     double y[N];
>     double r[N]; 
>     for ( i = 1; i <= N ; i ++ )
>     {
>         scanf("%.1d %.1d", &x[i], &y[i]);
>         r[i] =  x[i] * x[i] + y[i] * y[i] ;
>         year[i] = floor (PI * r[i] / 100) + 1;
>         printf ("Property %d: This property will begin eroding in year %d\n", i, year[i]);
>     }
>     printf ("END OF OUTPUT.\n");
>     system ("pause");
>     return 0;
> } 
改成这个少了.
printf ("Property %d: This property will begin eroding in year %d.\n", i, year[i]);