在C ++中重载+ = [英] Overloading += in c++

问题描述

如果我已经重载了operator +和operator =，我是否仍然需要重载 运算符+ =可以使类似的东西起作用:

If I've overloaded operator+ and operator= do I still need to overload operator+= for something like this to work:

MyClass mc1, mc2;
mc1 += mc2;

推荐答案

operator + =不是+和=的组合，因此您确实需要显式重载它，因为编译器不知道为您创建难题.但仍然可以通过在operator + =中使用它们来从已经定义/重载的运算符中受益.

operator+= is not a composite of + and =, therefore you do need to overload it explicitly, since compiler do not know to build puzzles for you. but still you do able to benefit from already defined/overloaded operators, by using them inside operator+=.

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