重载+添加两个指针 [英] Overloading + to add two pointers

问题描述

我有一个String类，我想重载+添加两个String *指针. 像这样的东西行不通:

I have a String class and I want to overload + to add two String* pointers. something like this doesn't work:

String* operator+(String* s1, String* s2);

有什么方法可以避免通过引用传递. 考虑以下示例:

Is there any way to avoid passing by reference. Consider this example:

String* s1 = new String("Hello");
String* s2 = new String("World");

String* s3 = s1 + s2;

我需要这种补充才能工作.请提出建议.

I need this kind of addition to work. Please suggest.

推荐答案

您不能.您不能重载内置类型的运算符.无论如何，为什么要使用指针呢?尽可能避免动态分配！

You can't. You cannot overload operators for built-in types. In any case, why use pointers at all? Avoid dynamic allocation as much as possible!

String s1("Hello");
String s2("World");

String s3 = s1 + s2;

那好多了，而且不会泄漏.现在您可以重载:

That's much better, and doesn't leak. Now you can overload:

String operator+(const String& s1, const String& s2);

你的愿望.当然，这是浪费时间，因为存在std::string. :)

how you desire. This is, of course, a waste of time because std::string exists. :)

这篇关于重载+添加两个指针的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！