delete vs delete [] [英] delete vs delete[]

问题描述

可能重复：

（POD）释放内存：是delete []等于删除吗？

当我被教C ++时，这是很久以前。我被告知不要使用 delete 但 delete [] code>在单个对象上将等效于 delete 。

When I was taught C++, this was a long time ago. I was told to never use delete but delete[] as performing delete[] on a single object will be equivalent to delete. Knowing not to trust teachers too much I wonder, Is this true?

是否有理由调用 delete 而不是 delete [] ？

Is there ever a reason to call delete instead of delete[]?

我在SO扫描了可能相关的问题，任何明确的答案。

I've scanned the possibly related questions in SO, but haven't found any clear answer.

推荐答案

从标准（5.3.5 / 2）：

From the standard (5.3.5/2) :

在第一个选项（删除
对象）中，
delete的操作数的值将是一个指向
非数组对象的指针或者指向表示这种对象的基本
类的
子对象（1.8）的指针（子句10）。

在第二个选项（删除
数组）中，
delete的操作数将是由前一个数组
new-expression产生的指针值
。 如果没有，
行为未定义。

等效！

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