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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c++
Subject: Re: standard error messages in a std::string or in a const char *
Date: Wed, 11 Sep 2019 17:11:16 -0700
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James Kuyper <jameskuyper@alumni.caltech.edu> writes:
[...]
> The C++ header <string.h> has essentially the same contents as the C
> header of the same name. The C++ header <cstring> differs from
> <string.h> mainly in that the functions are declared inside the std::
> namespace.

<string.h> defines strerror and other identifiers in the global
namespace, and may optionally define them in the std namespace, while
<cstring> defines them in the std namespace and may optionally define
them in the global namespace.

(I dislike this, but that's the way the language specifies it.)

Also, the <*.h> C headers are deprecated as of C++17.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Will write code for food.
void Void(void) { Void(); } /* The recursive call of the void */