文章插图
cstdio【cstdio】cstdio是将stdio.h的内容用C++头档案的形式表示出来 。stdio.h是C标準函式馆中的头档案 ， 即：standard buffered input&output 。提供基本的文字的输入输出流操作（包括萤幕和档案等） 。由于C语言并没有提供专用于文字输入输出的关键字 ， 所以该库是最普遍的C语言程式载入库 。
cstdio 和 stdio.h是有差别的 ， 并不是同样的档案 。
基本介绍中文名：cstdio
别称：C语言
所属：标準C++
类别：计算机
使用方法stdio.h是以往的C和C++的头档案 ， cstdio是标準C++（STL） ， 且cstdio中的函式都是定义在一个名称空间std里面的 ， 如果要调用这个名字空间的函式 ， 必须得加std::或者在档案中声明using namespace std 。#include<cstdio>using namespace std;/*你也可以同时加上这个语句*/头档案内容// -*- C++ -*- forwarding header.// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003// 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 2, 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.// You should have received a copy of the GNU General Public License along// with this library; see the file COPYING. If not, write to the Free// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,// USA.// As a special exception, you may use this file as part of a free software// library without restriction. Specifically, if other files instantiate// templates or use macros or inline functions from this file, or you compile// this file and link it with other files to produce an executable, this// file does not by itself cause the resulting executable to be covered by// the GNU General Public License. This exception does not however// invalidate any other reasons why the executable file might be covered by// the GNU General Public License.//// ISO C++ 14882: 27.8.2 C Library files///** @file cstdio * This is a Standard C++ Library file. You should @c #include this file * in your programs, rather than any of the "*.h" implementation files. * * This is the C++ version of the Standard C Library header @cstdio.h, * and its contents are (mostly) the same as that header, but are all * contained in the namespace @cstd. */#ifndef _GLIBCXX_CSTDIO#define _GLIBCXX_CSTDIO 1#pragma GCC system_header#include <bits/c++config.h>#include <cstddef>#include <stdio.h>// Get rid of those macros defined in <stdio.h> in lieu of real functions.#undef clearerr#undef fclose#undef feof#undef ferror#undef fflush#undef fgetc#undef fgetpos#undef fgets#undef fopen#undef fprintf#undef fputc#undef fputs#undef fread#undef freopen#undef fscanf#undef fseek#undef fsetpos#undef ftell#undef fwrite#undef getc#undef getchar#undef gets#undef perror#undef printf#undef putc#undef putchar#undef puts#undef remove#undef rename#undef rewind#undef scanf#undef setbuf#undef setvbuf#undef sprintf#undef sscanf#undef tmpfile#undef tmpnam#undef ungetc#undef vfprintf#undef vprintf#undef vsprintfnamespace std{ using ::FILE; using ::fpos_t; using ::clearerr; using ::fclose; using ::feof; using ::ferror; using ::fflush; using ::fgetc; using ::fgetpos; using ::fgets; using ::fopen; using ::fprintf; using ::fputc; using ::fputs; using ::fread; using ::freopen; using ::fscanf; using ::fseek; using ::fsetpos; using ::ftell; using ::fwrite; using ::getc; using ::getchar; using ::gets; using ::perror; using ::printf; using ::putc; using ::putchar; using ::puts; using ::remove; using ::rename; using ::rewind; using ::scanf; using ::setbuf; using ::setvbuf; using ::sprintf; using ::sscanf; using ::tmpfile; using ::tmpnam; using ::ungetc; using ::vfprintf; using ::vprintf; using ::vsprintf;}#if _GLIBCXX_USE_C99#undef snprintf#undef vfscanf#undef vscanf#undef vsnprintf#undef vsscanfnamespace __gnu_cxx{#if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC extern "C" int (snprintf)(char * restrict, size_t, const char * restrict, ...); extern "C" int (vfscanf)(FILE * restrict, const char * restrict, __gnuc_va_list); extern "C" int (vscanf)(const char * restrict, __gnuc_va_list); extern "C" int (vsnprintf)(char * restrict, size_t, const char * restrict, __gnuc_va_list); extern "C" int (vsscanf)(const char * restrict, const char * restrict, __gnuc_va_list);#endif#if !_GLIBCXX_USE_C99_DYNAMIC using ::snprintf; using ::vfscanf; using ::vscanf; using ::vsnprintf; using ::vsscanf;#endif}namespace std{ using __gnu_cxx::snprintf; using __gnu_cxx::vfscanf; using __gnu_cxx::vscanf; using __gnu_cxx::vsnprintf; using __gnu_cxx::vsscanf;}#endif#endif/*为了便于查看使用了全形空格" "*/