如何检查无效的指针？ [英] How do you check for an invalid pointer?

问题描述

我的当前代码的效果：

if( objectPointer != NULL){
    delete objectPointer;
}

不工作，因为指针被设置为无效的十六进制数编译器如：

doesn't work because the pointers are getting set to invalid hex numbers by the compiler such as:

• 0xbaadf00d


• 0xdeadbeef

等....

那么，在尝试删除对象之前检查无效指针的最好方法是什么？

So what's the best way to check for an invalid pointer before trying to delete the object?

推荐答案

始终将指针初始化为NULL（即0）。从 http://www.lysator.liu.se/c/c-faq/c -1.html ：

Always initialize your pointers to NULL (that is, 0). From http://www.lysator.liu.se/c/c-faq/c-1.html:

空指针在概念上与未初始化的指针不同。已知空指针不指向任何对象;未初始化的指针可能指向任何位置。

A null pointer is conceptually different from an uninitialized pointer. A null pointer is known not to point to any object; an uninitialized pointer might point anywhere.

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