#include包含了目前c++所包含的所有頭文件

對(duì)比：

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include using?namespace?std;

int?main(){

return?0;

}

可以直接轉(zhuǎn)化為：

#include

using?namespace?std;

int?main()

return?0;

}

兼容性問(wèn)題：

注意，目前POJ還不支持(G++、C++都不支持)。HDU部分支持(G++支持，C++不支持)。

其他國(guó)外的oj，還有臺(tái)灣的oj都支持，CF，Topcoder也都支持。

當(dāng)然，其實(shí)這是一個(gè)偷懶的寫(xiě)法，但是會(huì)降低編譯速度(為何會(huì)降低編譯速度，我還不能知道，等到之后學(xué)編譯原理再來(lái)填坑吧)。

筆試平臺(tái)可以使用，方便，VS中并不支持,一般G++ 4.4以上就支持這個(gè)頭文件了。當(dāng)然，私下自己學(xué)習(xí)就不要去使用了，對(duì)你的自主學(xué)習(xí)一點(diǎn)都沒(méi)有好處。

c++11支持這個(gè)

po上的源代碼

// C++ includes used for precompiling -*- C++ -*-

// Copyright (C) 2003-2014 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

#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

#include

#include

#include

#include

#include

#include

#include

#include

#include #endif

總結(jié)

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