#include <iostream.h>
#include <stdio.h>
#define N 9
void main()
{

  int m,a[N][N];
  char ch1,ch2;
  int i=0,j=0;
  int n=1,p=0;  //p：圈數

L: do{
     do{
        cout<<"Input a number between 1-9"<<endl;
        cin>>m;
        if(m<1||m>9)
           cout<<"Invalid!Again!"<<endl;
	 }while(m<1||m>9);

	 //start
       while(n<=m*m)
	   { //一圈一圈的轉
          while(j<m-p)
		  {
            a[i][j]=n;
            j++;n++;
		  } 
		  i++;j--;
          while(i<m-p)
		  {
            a[i][j]=n;
            i++;n++;
		  } 
		  i--;j--;
          while(j>=p)
		  {
            a[i][j]=n;
            j--;n++;
		  } 
		  i--;j++;
          while(i>p)
		  {
            a[i][j]=n;
            i--;n++;
		  } 
		  i++;j++;
        p++;
	   }
    //end
cout<<"Result:"<<endl;
for(i=0;i<m;i++)
{
for(j=0;j<m;j++)
{
    printf("%4d",a[i][j]);
}
cout<<endl;
}
do{ cout<<"GO ON?(Y/N)";
    cin>>ch1;
    if((ch1=='Y'||ch1=='y')||(ch1=='N'||ch1=='n'));
else
cout<<"Illegal Char!Again!"<<endl;
}while(!(ch1=='Y'||ch1=='y'||ch1=='N'||ch1=='n'));
}while(ch1=='Y'||ch1=='y');
if(ch1=='N'||ch1=='n')
{
cout<<"Really want to EXIT?(Y/N)";
        cin>>ch2;
if(ch2=='N'||ch2=='n')
goto L;
}

}