C ++重载运算符[] [] [英] C++ overload operator [ ][ ]

问题描述

我有类CMatrix，其中是值的数组的双指针。

I have class CMatrix, where is "double pointer" to array of values.

class CMatrix {
public:
    int rows, cols;
    int **arr;
};

我只需要键入以下内容来访问矩阵的值：

I simply need to access the values of matrix by typing:

CMatrix x;
x[0][0] = 23;

我知道如何使用：

x(0,0) = 23;

但我真的需要这样做。任何人可以帮助我吗？请？

But I really need to do that the other way. Can anyone help me with that? Please?

感谢大家的帮助，我这样做了...

Thank you guys for help at the end I did it this way...

class CMatrix {
public:
   int rows, cols;
   int **arr;

public:
   int const* operator[]( int const y ) const
   {
      return &arr[0][y];
   }

   int* operator[]( int const y )
   {
      return &arr[0][y];
   }

   ....

帮助我真的很感激它！

推荐答案

没有 operator [] [] 在C ++中。但是，您可以重载 operator [] 以返回另一个结构，并且在重载 operator [] 效果。

There is no operator[][] in C++. However, you can overload operator[] to return another structure, and in that overload operator[] too to get the effect you want.

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