蛇形添数

#include<iostream>using namespace std;int main(){int n;int a[100][100];int i,j,t;while(1){cin >> n;memset(a,0,sizeof(a));t = a[1][n] = 1;int x = 1,y=n;while(t<n*n){while(x<n&&!a[x+1][y]) a[++x][y] = ++t;while(y>1&&!a[x][y-1]) a[x][--y] = ++t;while(x>1&&!a[x-1][y]) a[--x][y] = ++t;while(y<n&&!a[x][y+1]) a[x][++y] = ++t;}for(i=1;i<=n;i++){for(j=1;j<=n;j++){cout << a[i][j] << " ";}cout << endl;}}return 0;}