如何初始化一个char数组？ [英] how to initialize a char array?

问题描述

char * msg = new char[65546];

要对所有的用户初始化为0。在C ++中最好的做法是什么？

want to initialize to 0 for all of them. what is the best way to do this in C++?

推荐答案

char * msg = new char[65546]();

它被称为值初始化，并在C ++ 03中引入。如果您碰巧在过去十年中陷入困境，那么您需要使用 std :: fill（） （或

It's known as value-initialisation, and was introduced in C++03. If you happen to find yourself trapped in a previous decade, then you'll need to use std::fill() (or memset() if you want to pretend it's C).

请注意，这不适用于除了以下之外的任何值：零。我认为C ++ 0x将提供一种方法来做到这一点，但我有点背后的时间，所以我不能评论。

Note that this won't work for any value other than zero. I think C++0x will offer a way to do that, but I'm a bit behind the times so I can't comment on that.

更新：it似乎我对语言的过去和未来的反省不完全准确;请参阅更正的注释。

UPDATE: it seems my ruminations on the past and future of the language aren't entirely accurate; see the comments for corrections.

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