动态类对象 动态数组

Posted 2020-10-09 千面鬼手大人

//在c++中通过构造来实现类对象的创建，通过析构来实现类对象的死亡
    CMyClass mc(1);//类对象的创建
    CMyClass *pmc = new CMyClass(2); //动态类对象的创建

    delete pmc;//动态类对象的释放

        int row, col;
    scanf("%d%d", &row, &col);
    //动态二维数组
    int **p = new int *[row];
    for (int i = 0; i < row; i++)
        *(p + i) = new int[col];

    for (int i = 0; i < row; i++)
    {
        for (int j = 0; j < col; j++)
        {
            *(*(p + i) + j) = i*col + j + 1; //随便赋的值
        }
    }

    for (int i = 0; i < row; ++i)
    {
        delete[] * (p + i);//删除底层指针
    }
    delete[] p; //删除上层指针