#include <stdio.h>
#define N 16 //N可修改
int main()
{
int a[N][N]={0},i,j,k,p,m,n;
p=1;
while(p==1)
{
printf("Enter n(1~%d): ",N-1);
scanf("%d",&n);
if((n!=0)&&(n<N)&&(n%2!=0))
p=0;
}
i=n+1;
j=n/2+1;
a[1][j]=1;
for(k=2;k<=n*n;k++)
{
i=i-1;
j=j+1;
if((i<1)&&(j>n))
{
i=i+2;j=j-1;
}
else
{
if(i<1) i=n;
if(j>n) j=1;
}
if(a[i][j]==0) a[i][j]=k;
else
{
i=i+2;
j=j-1;
a[i][j]=k;
}
}
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
printf("%4d",a[i][j]);
printf("\n");
}
return 0;
}