数字旋涡问题

老师出了一道题,但是想了三个点没想出来
题是这样的,假如输入2
输出12
    43
输入3
输入123
    894
    765
很难呀!     帮忙解决一下
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如果是4呢？
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是螺旋数字方阵吧，是个顺时针的.很久前写过个
#include <stdio.h>
#include <stdlib.h>
int movei[4]={1,0,-1,0};
int movej[4]={0,1,0,-1};
int print(int*,int);
int clock(int,int *);                                             
int print(int *pa,int n){            
    int i,j;                                          
    for(i=0;i<=n-1;i++){                                 
       for(j=0;j<=n-1;j++)
          printf("%4d",*(pa+i*n+j));
       printf("\n");
    }
    printf("\n");
    return 0;
}
int clock(int n,int *a){
    int i=0,j=0,t=1,x1=n,y1=n,x2=-1,y2=0,direct=1;
    while(t<=n*n){
                  *(a+i*n+j)=t++;
                  i+=movei[direct];
                  j+=movej[direct];
                  if(j==x1&&i==y2){
                                  j--;
                                  i++;
                                  direct=0;
                                  x1--;
                                  continue;
                                 
                  }
                  if(j==x1&&i==y1){
                                   j--;
                                   i--;
                                   y1--;
                                   direct=3;
                                   continue;
                  }
                  if(j==x2&&i==y1){
                                   j++;
                                   i--;
                                   x2++;
                                   direct=2;
                                   continue;
                  }
                  if(j==x2&&i==y2){
                                   i++;
                                   j++;
                                   y2++;
                                   direct=1;
                  }
    }                                
    return 0;
}                                                                                                                 
int main()
{
  int a[900]={0},n;
  scanf("%d",&n);
  clock(n,&a[0]);
  print(&a[0],n);
  system("PAUSE");    
  return 0;
}
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这个是程序员考试书上的..可以去找看看啊
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感觉步骤这么多呢?
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也没有输入的!
怎么搞的,好像很难的样子!
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什么叫也没有输入的？
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假如输入5那就是5*5的方阵呀
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我写的那个应该没有问题
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考点是考算法吗?
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