What is purpose of a “this” pointer in C++? [duplicate]

Answer 1

• Helps in disambiguating variables.
• Pass yourself as a parameter or return yourself as a result

Example:

struct A
{
    void test(int x)
    {
        this->x = x;                 // Disambiguate. Show shadowed variable.
    }
    A& operator=(A const& copy)
    {
        x = copy.x;
        return *this;                // return a reference to self
    }

    bool operator==(A const& rhs) const
    {
         return isEqual(*this, rhs); // Pass yourself as parameter.
                                     // Bad example but you can see what I mean.
    }

    private:
        int x;
};