重载运算符=两倍 [英] Overloading operator= for double

问题描述

是否可能重载= double类型的运算符?

Is it possible to overload = operator of type double?

我有以下内容:

double operator=(double a, Length b) {
    return a = (b.getInches()/12+b.getFeet())*3.2808*0.9144;
}

它引发以下错误:

'double operator=(double, Length)' must be a nonstatic member function

我在做什么错了?

推荐答案

您不能重载诸如 double 之类的内置(整数或浮点)类型的运算符，也不能全局重载= 运算符，用于 any 类型. = 运算符只能作为类成员函数重载.

You cannot overload operators for builtin (integral or floating point) types like double, and also you cannot globally overload the = operator for any type. The = operator can only be overloaded as a class member function.

另请参见:我可以定义一个运算符重载来与内置/固有/原始类型?

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