#include ＜vector＞_platdform #include <vector>-优快云博客

C++ 标准库（Standard Template Library, STL）是 C++ 的一个重要组成部分，它提供了一组通用的模板类和函数，用于处理数据集合。<vector> 是 STL 中的一个容器类，用于存储动态大小的数组。

<vector> 是一个序列容器，它允许用户在容器的末尾快速地添加或删除元素。与数组相比，<vector> 提供了更多的功能，如自动调整大小、随机访问等。

// <vector> -*- C++ -*-

// Copyright (C) 2001-2020 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/>.

/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 *
 * Copyright (c) 1996
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */

/** @file include/vector
 *  This is a Standard C++ Library header.
 */

#ifndef _GLIBCXX_VECTOR
#define _GLIBCXX_VECTOR 1

#pragma GCC system_header

#include <bits/stl_algobase.h>
#if __cplusplus > 201703L
#  include <bits/stl_algo.h> // For remove and remove_if
#endif // C++20
#include <bits/allocator.h>
#include <bits/stl_construct.h>
#include <bits/stl_uninitialized.h>
#include <bits/stl_vector.h>
#include <bits/stl_bvector.h>
#include <bits/range_access.h>

#ifndef _GLIBCXX_EXPORT_TEMPLATE
# include <bits/vector.tcc>
#endif

#ifdef _GLIBCXX_DEBUG
# include <debug/vector>
#endif

#if __cplusplus >= 201703L
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
  namespace pmr {
    template<typename _Tp> class polymorphic_allocator;
    template<typename _Tp>
      using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
  } // namespace pmr
# ifdef _GLIBCXX_DEBUG
  namespace _GLIBCXX_STD_C::pmr {
    template<typename _Tp>
      using vector
	= _GLIBCXX_STD_C::vector<_Tp, std::pmr::polymorphic_allocator<_Tp>>;
  } // namespace _GLIBCXX_STD_C::pmr
# endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++17

#if __cplusplus > 201703L
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

#define __cpp_lib_erase_if 202002L

  template<typename _Tp, typename _Alloc, typename _Predicate>
    inline typename vector<_Tp, _Alloc>::size_type
    erase_if(vector<_Tp, _Alloc>& __cont, _Predicate __pred)
    {
      const auto __osz = __cont.size();
      __cont.erase(std::remove_if(__cont.begin(), __cont.end(), __pred),
		   __cont.end());
      return __osz - __cont.size();
    }

  template<typename _Tp, typename _Alloc, typename _Up>
    inline typename vector<_Tp, _Alloc>::size_type
    erase(vector<_Tp, _Alloc>& __cont, const _Up& __value)
    {
      const auto __osz = __cont.size();
      __cont.erase(std::remove(__cont.begin(), __cont.end(), __value),
		   __cont.end());
      return __osz - __cont.size();
    }
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++20

#endif /* _GLIBCXX_VECTOR */

`push_back(const T& val)`	在末尾添加元素
`pop_back()`	删除末尾元素
`at(size_t pos)`	返回指定位置的元素，带边界检查
`operator[]`	返回指定位置的元素，不带边界检查
`front()`	返回第一个元素
`back()`	返回最后一个元素
`data()`	返回指向底层数组的指针
`size()`	返回当前元素数量
`capacity()`	返回当前分配的容量
`reserve(size_t n)`	预留至少 `n` 个元素的存储空间
`resize(size_t n)`	将元素数量调整为 `n`
`clear()`	清空所有元素
`insert(iterator pos, val)`	在指定位置插入元素
`erase(iterator pos)`	删除指定位置的元素
`begin()` / `end()`	返回起始/结束迭代器