C++的万能头文件bits/stdc++.h的使用

Bertha 。 2023-10-07 11:32 27阅读 0赞

因为好久没有研究过C++的程式了，最近要做一个小demo，最后发现现在好多都直接使用`#include <bits/stdc++.h>`,这个基本包含了所有需要导入的头文件，方便很多。接下来我把在visual studio中的使用方法来详细说一下：

我这里使用的时visual studio2019，其它版本也一样  
第一步：  
先新建一个`stdc++.h`文件，然后将以下代码粘贴进去，（目前统计这些，如果你有其它需要也可以自行添加）

// 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
    // <http://www.gnu.org/licenses/>.
     
    /** @file stdc++.h
     *  This is an implementation file for a precompiled header.
     */
     
    // 17.4.1.2 Headers
     
    // C
    #ifndef _GLIBCXX_NO_ASSERT
    #include <cassert>
    #endif
    #include <cctype>
    #include <cerrno>
    #include <cfloat>
    #include <ciso646>
    #include <climits>
    #include <clocale>
    #include <cmath>
    #include <csetjmp>
    #include <csignal>
    #include <cstdarg>
    #include <cstddef>
    #include <cstdio>
    #include <cstdlib>
    #include <cstring>
    #include <ctime>
     
    #if __cplusplus >= 201103L
    #include <ccomplex>
    #include <cfenv>
    #include <cinttypes>
    #include <cstdalign>
    #include <cstdbool>
    #include <cstdint>
    #include <ctgmath>
    #include <cwchar>
    #include <cwctype>
    #endif
     
    // C++
    #include <algorithm>
    #include <bitset>
    #include <complex>
    #include <deque>
    #include <exception>
    #include <fstream>
    #include <functional>
    #include <iomanip>
    #include <ios>
    #include <iosfwd>
    #include <iostream>
    #include <istream>
    #include <iterator>
    #include <limits>
    #include <list>
    #include <locale>
    #include <map>
    #include <memory>
    #include <new>
    #include <numeric>
    #include <ostream>
    #include <queue>
    #include <set>
    #include <sstream>
    #include <stack>
    #include <stdexcept>
    #include <streambuf>
    #include <string>
    #include <typeinfo>
    #include <utility>
    #include <valarray>
    #include <vector>
     
    #if __cplusplus >= 201103L
    #include <array>
    #include <atomic>
    #include <chrono>
    #include <condition_variable>
    #include <forward_list>
    #include <future>
    #include <initializer_list>
    #include <mutex>
    #include <random>
    #include <ratio>
    #include <regex>
    #include <scoped_allocator>
    #include <system_error>
    #include <thread>
    #include <tuple>
    #include <typeindex>
    #include <type_traits>
    #include <unordered_map>
    #include <unordered_set>
    #endif

第二步  
打开visual studio安装目录找到MSCV文件夹，一般是在这里  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwNjUzNjMx_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwNjUzNjMx_size_16_color_FFFFFF_t_70 1]  
注意这个文件夹数字可能你跟我不一样，然后进去找到include下的bits目录将文件copy进去就可以了  
![在这里插入图片描述][20200323085630651.png]  
![在这里插入图片描述][20200323085649626.png]  
现在就可以正常导入了

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwNjUzNjMx_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2020032308062538.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwNjUzNjMx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwNjUzNjMx_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200323085249353.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMwNjUzNjMx,size_16,color_FFFFFF,t_70
[20200323085630651.png]: https://img-blog.csdnimg.cn/20200323085630651.png
[20200323085649626.png]: https://img-blog.csdnimg.cn/20200323085649626.png