#include<iostream>
#define MAXROW 4
#define MAXCOL 4

using namespace std;
//轉圈列印矩陣
//注意矩陣形狀：1、行向量  2、列向量  3、普通矩陣

void printEdge(int m[][MAXCOL],int tR,int tC,int dR, int dC)
{
	//如果是行向量
	if(tR == dR)
	{
		for(int i=tC;i<=dC;i++)
		{
			cout<<m[tR][i]<<"\t";
		}
	}
	//如果是列向量
	else if(tC == dC)
	{
		for(int i=tR;i<=dR;i++)
			cout<<m[i][tC]<<"\t";
	}
	//如果是普通矩陣
	else
	{
		int curC = tC;
		int curR = tR;
		
		while(curC != dC)
		{
			cout<<m[tR][curC]<<"\t";
			curC++;

		}
		while(curR != dR)
		{
			cout<<m[curR][dC]<<"\t";
			curR++;
		}
		while(curC != tC)
		{
			cout<<m[dR][curC]<<"\t";
			curC--;
		}
		while(curR != tR)
		{
			cout<<m[curR][tC]<<"\t";
			curR--;
		}
	}
	cout<<endl;
}

void printSpecialMatrix(int m[][MAXCOL])
{
	cout<<"==============NEW MATRIX=============="<<endl;
	int tR=0,tC=0;
	int dR=MAXROW-1,dC=MAXCOL-1;
	while(tR <= dR && tC <= dC)
		printEdge(m,tR++,tC++,dR--,dC--);

	
}

void printMatrix(int m[][MAXCOL])
{
	cout<<"==============OLD MATRIX=============="<<endl;
	for(int i=0;i<MAXROW;i++)
	{
		for(int j=0;j<MAXCOL;j++)
			cout<<m[i][j]<<"\t";
		cout<<endl;
	}
		
}

int main()
{
	int matrix[MAXROW][MAXCOL] = {{1,2,3,4},{5,6,7,8},{9,10,11,12},{13,14,15,16}};
	printMatrix(matrix);
	printSpecialMatrix(matrix);
	return 0;
}