螺旋队列

#include <stdio.h>
#include <math.h>
#define abs(a) ((a>0) ? (a) :(-a))
#define max(a,b) ((a>b) ?(a):(b))
int spiral(int,int);
int main()
{
    int x,y,answer;
    for(y=-5;y<=5;y++)
    {

        for(x=-5;x<=5;x++)
        { answer=spiral(x,y);
        printf("%5d ",answer);
        }
        printf("\n");
    }
    while(scanf("%d %d",&x,&y)==2)
        printf("%d\n",spiral(x,y));

    //
    return 0;
}
int spiral(int x,int y)
{
    int t=max(abs(x),abs(y));
    int a=2*t+1;
    int v=(int)pow(a,2);
    int u;
    if(y==-t)
    {
        u=v+y+x;
    }
    else if(x==-t)
    {
        u=v+3*x-y;
    }
    else if(y==t)
    {
        u=v-5*y-x;
    }
    else
        u=v-7*x+y;
    return u;

}