是否有C ++等价的NullPointerException [英] Is there a C++ equivalent of a NullPointerException

问题描述

Java和C＃，以及可能许多其他语言，都有一个预定义的异常类，当使用null参数时，抛出异常类。 C ++中有什么类似的东西吗？

Both Java and C#, and probably many other languages too, have a predefined exception class that is thrown when a null parameter is used where it should not. Is there anything similar in C++? If not, is there another predefined exception I can use or should I define my own one?

推荐答案

解除引用NULL指针是未定义的在C ++中的行为 - 这意味着代码可以看起来工作。不能保证抛出异常。您可以使用

Dereferencing a NULL pointer is undefined behaviour in C++ - which means the code can appear to work. An exception isn't guaranteed to be thrown. You can use the

std： ：invalid_argument

异常（为它提供有意义的值 - p is NULL code>），但你必须自己做检查。

exception (provide a meaningful value to it - "p is NULL"), but you'll have to do the check yourself.

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