C++中动态申请数组

动态申请一维数组

申请使用new，释放使用delete[]

可以通过数组名[下标]和*(数组名+下标)的方式访问数组

int main()
{
    int number = 10;
    int *array = new int[number];
    //数组初始化
    for (int i = 0; i < number; ++i)
    {
        array[i] = i;
    }
    for (int i = 0; i < number; ++i)
    {
        cout << *(array + i) << " ";
    }
    cout << endl;
    //使用完以后记得释放哦
    delete[] array;
    return 0;
}

动态申请二维数组

二维数组的申请需要循环地申请二维数组的行指针。

int main()
{
    int row = 10;
    int column = 10;
    //申请空间
    int **matrix = new int*[row];
    for (int i = 0; i < row; ++i)
    {
        matrix[i] = new int[column];
    }
    //矩阵初始化
    for (int i = 0; i < row; ++i)
    {
        for (int j = 0; j < column; ++j)
        {
            matrix[i][j] = i * 10 + j;
        }
    }
    //矩阵输出
    for (int i = 0; i < row; ++i)
    {
        for (int j = 0; j < column; ++j)
        {
            if (i == 0) cout << ‘0‘;
            cout << matrix[i][j] << ‘ ‘;
        }
        cout << ‘\n‘;
    }
    cout << endl;
    //使用完以后记得释放哦
    for (int i = 0; i < row; ++i)
    {
        delete[] matrix[i];
    }
    delete[] matrix;
    return 0;
}

输出结果：