重载括号运算符 [] 以获取和设置

问题描述

我有以下课程:

class risc { // singleton
    protected:
        static unsigned long registers[8];

    public:
        unsigned long operator [](int i)
        {
            return registers[i];
        }
};

如您所见，我已经为获取"实现了方括号运算符.
现在我想实现它进行设置，即:risc[1] = 2.

as you can see I've implemented the square brackets operator for "getting".
Now I would like to implement it for setting, i.e.: risc[1] = 2.

怎么做?

推荐答案

试试这个:

class risc { // singleton
protected:
    static unsigned long registers[8];

public:
    unsigned long operator [](int i) const    {return registers[i];}
    unsigned long & operator [](int i) {return registers[i];}
};

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