C++ 我应该为 memcpy 和 realloc 包含什么头文件?

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时间:2020-08-27 22:52:08  来源:igfitidea点击:

What header should I include for memcpy and realloc?

c++objective-cheadermemcpyrealloc

提问by AP.

I am porting a project to the iPhone and it uses reallocand memcpywhich are not found. What is the header to include?

我移植了一个项目,iPhone和它使用reallocmemcpy未找到。要包含的标题是什么?

It's a project mixing Objective C and C++ and I am starting to be lost.

这是一个混合了 Objective C 和 C++ 的项目,我开始迷失了。

Thanks in advance for your help!

在此先感谢您的帮助!

回答by GManNickG

In C:

在 C 中:

#include <string.h> // memcpy
#include <stdlib.h> //realloc

In C++, remove the .hand prefix with a c. In C++, they will be placed in the stdnamespace, but are also global.

在 C++ 中,删除.h和 前缀c。在 C++ 中,它们将被放置在std命名空间中,但也是全局的。

回答by Tyler McHenry

In C++ it's more idiomatic to use std::copythan C's memcpy, although the latter does work just as well. To get std::copy, you need to #include <algorithm>.

在 C++ 中,它std::copy比 C更惯用memcpy,尽管后者也能正常工作。要得到std::copy,你需要#include <algorithm>

There's not a direct C++ equivalent to realloc, though.

但是,没有直接的 C++ 等价于realloc