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最新推荐文章于 2022-02-25 19:38:17 发布

Lu_ming

最新推荐文章于 2022-02-25 19:38:17 发布

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文章标签： features access c

本文链接：https://blog.youkuaiyun.com/Lu_ming/article/details/2875510

本文探讨了C++中const_cast操作符的使用场景及其限制。虽然该操作符能够改变指向常量的指针属性，但直接修改常量值会导致未定义行为。作者解释了为什么有时需要这种灵活性以及如何正确使用它。

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The "const_cast" is not all powerful. It can change the pointer access to a quantity, but the effect of
attempting to change a quantity that is declared "const" is undefined.

Why we use the operator? The reason for this operator is that occasionally you may have a need for value that
is constant most of the time but which can be changed occasionally. For customer or caller, it is a constant,
for implementer, it must be alter on possible occasion. This could be done using the general cast, but the general
cast can also simultaneously change the type.

Many a programmer usually is puzzled by some features of C++ language. Some operator, virual functions, and so on.
Every feature in C++ language is assigned to a purpose.