解除分配位置的指针是否是未定义的行为？ [英] Pointer to deallocated location Is it a Undefined Behavior?

问题描述

解除分配位置的指针是否是未定义的行为？

Pointer to deallocated location Is it a Undefined Behavior?

http ：//ideone.com/Qp3uY

int *p = new int;

*p = 10;

delete p;

*p = 10;

cout << *p << endl;

推荐答案

只有一个指向解除分配位置的指针不是未定义的行为本身。尝试取消引用该指针确实会产生未定义的行为。

There mere existence of a pointer to a deallocated location is not undefined behavior in itself. Attempting to dereference that pointer does produce undefined behavior though.

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