#include <iostream>using namespace std;char map[10000][10000];int main(){ int i, j, m, n, tot; char ch = 'A'; cin >> m >> n; for(i = 0; i < m; i++) for (j = 0; j < n; j++) map[i][j] = '0'; i = j = tot = 0; map[i][j] = 'A'; while (tot < n*m-1){//注意这里的判断！while (j+1 < n && map[i][j+1] == '0'){ if (ch >= 90) ch -= 26; j = j + 1; ch = ch + 1; map[i][j] = ch; tot = tot + 1; } while (i+1 < m && map[i+1][j] == '0'){ if (ch >= 90) ch -= 26; i = i + 1; ch = ch + 1; map[i][j] = ch; tot = tot + 1; } while (j-1 >= 0 && map[i][j-1] == '0'){ if (ch >= 90) ch -= 26; j = j - 1; ch = ch + 1; map[i][j] = ch; tot = tot + 1; } while (i-1 >= 0 && map[i-1][j] == '0'){ if (ch >= 90) ch -= 26; i = i - 1; ch = ch + 1; map[i][j] = ch; tot = tot + 1; } } for (i = 0; i < m; i++){ for (j = 0; j < n; j++) cout << " " << map[i][j]; cout << endl; }}
