C++为何要同时支持指针和引用

由于加入引用是为了支持operator overloading。这里有一个假设，若是没有引用，那么，用指针来operator overloading操做。
A operator +(const A *a, const A *_a);
那么使用的时候，&a + &b，这样看起来是否是很难受。
而引入引用的概念，既能够知足overload operator，也不失重载value和pointer的灵活性。并且引用还带来一个指针没法替代的特性: 引用临时对象。由于引用必须在定义的时候就赋值，之后没法更改。

做者：Meowz
连接：https://www.zhihu.com/question/34988367/answer/60656358
来源：知乎
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Stroustrup: C++ Style and Technique FAQ

Why does C++ have both pointers and references?

C++ inherited pointers from C, so I couldn't remove them without causing serious compatibility problems. References are useful for several things, but the direct reason I introduced them in C++ was to support operator overloading.

做者：Milo Yip
连接：https://www.zhihu.com/question/34988367/answer/60715029
来源：知乎
著做权归做者全部，转载请联系做者得到受权。