初始化一個巢狀的char型巢狀vector,已知C++11允許vector用花括號{}的初始方式,vector元素以逗號隔開,例如:

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

推廣之,易知巢狀vector就是內層vector作為外層vector的元素,初始化用兩層花括號,第一層花括號之間用逗號隔開:

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

輸出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;
    }

結果:

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