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初始化一个嵌套的char型嵌套vector,已知C++11允许vector用花括号{}的初始方式,vector元素以逗号隔开,例如:

vector<char>> board = {'X', 'X', 'X'};

推广之,易知嵌套vector就是内层vector作为外层vector的元素,初始化用两层花括号,第一层花括号之间用逗号隔开:

vector<vector<char>> board = {{'X','.','.','X'},{'.','.','.','X'},{'.','.','.','X'}};

输出board:

int m = board.size();
    int n = board[0].size();
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            cout<< board[i][j]<<" ";
        }
        cout<<endl;
    }

结果:

X . . X 
. . . X 
. . . X