本机环境：win10系统 64位 vs2017

最近码代码时偶然发现了bits/stdc++.h这个头文件（万能头文件），基本上所有的代码只要用了这个头文件就不再写其他头文件了。

看到它就仿佛开启了新世界（也有缺点，就是导致编译速度变慢，不过一般可以忽略不计）。

【如果安装了MinGW的直接在文件夹里面找到bits这个文件夹，把里面内容复制粘贴到vs的头文件库里面】

1 .新建txt文档，把以下代码（stdc++.h源码）复制进去：

// C++ includes used for precompiling -*- C++ -*- // Copyright (C) 2003-2015 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 #endif // C++#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include

2. 把txt文档改名stdc++.h

3. 打开vs2017的安装目录

C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\include格式类似上面

在“include”目录下新建文件夹“bits”，然后把刚才的bits/stdc++.h移入。

4. 大功告成