#include <stdio.h>
#include <stdlib.h> 
#define MAX 15

int Square[MAX][MAX];
int N;

int main(){
	int i , j ,row=0 , col=0 , num=2;
	do {
		printf("\nEnter odd matrix size : ");
		scanf("%d",&N);
		
		if( N % 2 == 0 || N <= 0 || N > 15){
			printf("should be > 0 and 15 odd number");
		}else{
			break;
		}
	}while(1);
	
	while(1){
		Square[0][(N-1)/2] = 1;
		col=(N-1)/2;
		if((row-1)<0 && (col+1<N)){
			row = N-1;  // 如果行數超出上邊界，回到最後一行
			col++;
			Square[row--][col--] = num;
		}else if ((row-1)>0 && (col+1<N)){
//			row--;
			col = 4;  // 如果列數超出左邊界，回到第一列
			Square[row--][co--] = num;
		}else if((row-1)>0 && (col+1<N)){
			row = row-1;  // 如果行數超出上邊界及右邊界，回到下一行
			Square[row--][col--] = num;
		}
		
		if(Square[row][col]==0){
			Square[row--][col--] = num;
		}
		
		printf("num=%d ,Square[%d][%d]=%d\n",num ,row,col,Square[row][col]);
//		row++, col++;
		num++;
		
		
		if(num>N*N)
			break;
	}

//	for(i=0;i<N;i++){
//		for(j=0;j<N;j++){
//			printf("%d\t",Square[i][j]);
//		}printf("\n");
//	}
		
	
	return 0 ;
}