顺时针打印矩阵

#include<iostream>using namespace std;const int m=4;const int n=4;int mat[m][n];bool vis[m][n];int dir=1;void init(){memset(vis,0,sizeof(vis));int num=1;for(int i=0;i<m;i++)for(int j=0;j<n;j++)mat[i][j]=num++;}int main(){init();int i=0,j=-1,count=0;while(count<m*n){if(dir==1){while(!vis[i][j+1]&&j+1<n){cout<<mat[i][j+1]<<" ";vis[i][j+1]=1;count++;j++;}dir=2;}if(dir==2){while(!vis[i+1][j]&&i+1<m){cout<<mat[i+1][j]<<" ";vis[i+1][j]=1;count++;i++;}dir=3;}if(dir==3){while(!vis[i][j-1]&&j-1>=0){cout<<mat[i][j-1]<<" ";vis[i][j-1]=1;count++;j--;}dir=4;}if(dir==4){while(!vis[i-1][j]&&i-1>=0){cout<<mat[i-1][j]<<" ";vis[i-1][j]=1;count++;i--;}dir=1;}}system("pause");return 0;}