devc++的string库不能使用问题

Question

Devc++没法使用<bits/srdc++.h>这种头文件
一旦引入该库，一运行就是跳转找另一个库显示是这样的

发一下完整代码

// -*- C++ -*- forwarding header.

// Copyright (C) 1997-2014 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
// <http://www.gnu.org/licenses/>.

/** @file cstring
 *  This is a Standard C++ Library file.  You should @c \#include this file
 *  in your programs, rather than any of the @a *.h implementation files.
 *
 *  This is the C++ version of the Standard C Library header @c string.h,
 *  and its contents are (mostly) the same as that header, but are all
 *  contained in the namespace @c std (except for names which are defined
 *  as macros in C).
 */

//
// ISO C++ 14882: 20.4.6  C library
//

#pragma GCC system_header

#include <bits/c++config.h>
#include <string.h>

#ifndef _GLIBCXX_CSTRING
#define _GLIBCXX_CSTRING 1

// Get rid of those macros defined in <string.h> in lieu of real functions.
#undef memchr
#undef memcmp
#undef memcpy
#undef memmove
#undef memset
#undef strcat
#undef strchr
#undef strcmp
#undef strcoll
#undef strcpy
#undef strcspn
#undef strerror
#undef strlen
#undef strncat
#undef strncmp
#undef strncpy
#undef strpbrk
#undef strrchr
#undef strspn
#undef strstr
#undef strtok
#undef strxfrm

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  using ::memchr;
  using ::memcmp;
  using ::memcpy;
  using ::memmove;
  using ::memset;
  using ::strcat;
  using ::strcmp;
  using ::strcoll;
  using ::strcpy;
  using ::strcspn;
  using ::strerror;
  using ::strlen;
  using ::strncat;
  using ::strncmp;
  using ::strncpy;
  using ::strspn;
  using ::strtok;
  using ::strxfrm;
  using ::strchr;
  using ::strpbrk;
  using ::strrchr;
  using ::strstr;

#ifndef __CORRECT_ISO_CPP_STRING_H_PROTO
  inline void*
  memchr(void* __s, int __c, size_t __n)
  { return __builtin_memchr(__s, __c, __n); }

  inline char*
  strchr(char* __s, int __n)
  { return __builtin_strchr(__s, __n); }

  inline char*
  strpbrk(char* __s1, const char* __s2)
  { return __builtin_strpbrk(__s1, __s2); }

  inline char*
  strrchr(char* __s, int __n)
  { return __builtin_strrchr(__s, __n); }

  inline char*
  strstr(char* __s1, const char* __s2)
  { return __builtin_strstr(__s1, __s2); }
#endif

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif

请问有人知道这是为什么，应该怎么做吗

Answer 1

不知道你这个问题是否已经解决, 如果还没有解决的话:

• 以下回答来自chatgpt:

  回答:

  在DevC++中使用string库，应当包含头文件。

  即在代码中加入如下语句：

  #include<string>
  

  然后就可以正常使用string了，例如：

  #include<iostream>
  #include<string>
  
  using namespace std;
  
  int main()
  {
      string str = "hello, world!";
      cout << str << endl;
      return 0;
  }
  

  关于这个头文件，它并不是C++标准库中的头文件，只是一些编译器的扩展头文件。如果在使用其他编译器时，发现需要使用该头文件可以考虑手动下载并添加到编译器的include路径中，但在DevC++中并不需要。

  需要注意的一点是，在使用string时如果出现以下错误：

  ‘basic_string’ is not a member of ‘std’
  

  应该是当前的C++编译器版本比较低导致的，可以尝试升级编译器或使用更加基础的字符串类型。

  希望可以帮到您。

如果你已经解决了该问题, 非常希望你能够分享一下解决方案, 写成博客, 将相关链接放在评论区, 以帮助更多的人 ^-^