NULL指针的取消引用是否也等于NULL? [英] Is a NULL pointer's dereference also equals NULL?

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.

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