NULL指针的取消引用是否也等于NULL?

本文介绍了NULL指针的取消引用是否也等于NULL?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

以下代码段是否在if语句中编译/执行该块?

Does the following snippet compile/execute the block in the if-statement?

int* pointer = NULL; int deref = *pointer; if(deref == NULL){ // will execute? }

由于pointer变量包含NULL，因此对该指针变量的取消引用还会返回NULL还是会导致运行时错误?

Since the pointer variable contains NULL does the dereference of this pointer variable also return NULL or will this result in a runtime error?

推荐答案

结果是未定义的行为"，它可能会或可能不会触发运行时错误，并且在任何情况下都应避免.

The result is "undefined behaviour", which may or may not trigger a runtime error, and should in any case always be avoided.