•介绍
#include包含了目前 C++ 所包含的所有头文件，又称万能头文件，简直是开挂一般的存在。
你编程所需要的头文件基本上都囊括在了该万能头文件中，试想一下，将若干行头文件：
#include
#include
#include
#include
只用一行代码#include来代替，是不是简单粗暴！
•如何在VS2022中使用万能头
可惜，这么好的万能头，在VS2022中不能使用，难道就此放弃吗？
不，作为21世纪有思想的时代青年，这点问题怎么能难道我呢？
首先，找到你本地VS的安装目录，在VS中找到 include 文件夹，我的在该路径上：
D:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.31.31103\include
在 include 文件夹下创建一个bits 文件夹，并新建一个stdc++.h的文件，将如下代码复制到stdc++.h 文件中，即可在 VS2022 中使用万能头。
// C++ includes used for precompiling -*- C++ -*-
// Copyright (C) 2003-2016 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// .
/** @file stdc++.h
* This is an implementation file for a precompiled header.
*/
// 17.4.1.2 Headers
// C
#ifndef _GLIBCXX_NO_ASSERT
#include
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#if __cplusplus >= 201103L
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
// C++
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
设置完成后，重启 VS 即可愉悦的使用万能头了，完结撒花！
提供CDN加速