2013.6.14蛇形矩阵

#include <iostream>
#include <string.h>
using namespace std;
#define  MAX 100

int A[MAX][MAX];

void printMatrix(int n)
{
	memset(A,0,sizeof(int)*MAX*MAX);
	int sum=0;
	A[0][0]=++sum;
	int i=0,j=0;
	while(sum<n*n)
	{
		while (j<n-1 && A[i][j+1]==0)
		{
			A[i][++j]=++sum;
		}
		while (i<n-1 && A[i+1][j]==0)
		{
			A[++i][j]=++sum;
		}
		while (j>0 && A[i][j-1]==0)
		{
			A[i][--j]=++sum;
		}
		while(i>0 && A[i-1][j]==0)
		{
			A[--i][j]=++sum;
		}
	}
	for (int i=0;i<n;++i)
	{
		for (int j=0;j<n;++j)
		{
			printf("%3d ",A[i][j]);
		}
		printf("\n");
	}
}



int main()
{
	printMatrix(4);
}