一、vector介绍 vector是一个序列容器模板类,它包含在#include<vecor>头文件中,在cppreference中std::vecotr是一个封装动态大小的序列容器,从定义中我们能知道几个关键词,“动态”,“序列”,“容器”。 1.动态代表着vector的存储是自动处理的,可以根据需要进行扩展。也就是说vector不需要在每次插入元素时重新分配内...
__cpp_lib_incomplete_container_elements201505L(C++17)最低限度支持不完整类型 (C++17 起) Allocator-用于获取/释放内存及构造/析构内存中元素的分配器。类型必须满足分配器(Allocator)。如果Allocator::value_type与T不同,那么行为未定义(C++20 前)程序非良构(C++20 起)。
(const_iterator first, const_iterator last); constexpr void swap(vector&) noexcept( allocator_traits<Allocator>::propagate_on_container_swap::value || allocator_traits<Allocator>::is_always_equal::value); static constexpr void swap(reference x, reference y) noexcept; constexpr void flip() ...
cppreference.com Create account Page Discussion Standard revision:DiffC++98/03C++11C++14C++17C++20C++23C++26 View Edit History std::vector C++ Containers library std::vector Defined in header<vector> template< classT, classAllocator=std::allocator<T> ...
std::vector<bool> behaves similarly to std::vector, but in order to be space efficient, it: Does not necessarily store its elements as a contiguous array. Exposes class std::vector<bool>::reference as a method of accessing individual bits. In particular, objects of this class are return...
reference front():返回首元素的引用 reference back():返回尾元素的引用 iterator begin():返回向量头指针,指向第一个元素 iterator end():返回向量尾指针,指向向量最后一个元素的下一个位置 reverse_iterator rbegin():反向迭代器,指向最后一个元素 reverse_iterator rend():反向迭代器,指向第一个元素之前的位置...
From cppreference.com Containers library vector::beginvector::cbegin (C++11) vector::endvector::cend (C++11) vector::rbeginvector::crbegin (C++11) vector::rendvector::crend (C++11) vector::empty vector::size vector::max_size vector::reserve ...
Reference operator [g] : g1[2] = 30 at : g1.at(4) = 50 front() : g1.front() = 10 back() : g1.back() = 100 The first element is 10 修饰符Modifiers: C/C++programtoillustratethe// Modifiers in vector#include<bits/stdc++.h>#include<vector>usingnamespacestd;intmain(){// ...
CAutoVectorPtr::Allocate呼叫這個方法,以配置 所指向CAutoVectorPtr之 物件數位所需的記憶體。 CAutoVectorPtr::Attach呼叫此方法以取得現有指標的擁有權。 CAutoVectorPtr::D etach呼叫此方法以釋放指標的擁有權。 CAutoVectorPtr::Free呼叫這個方法,以刪除 所CAutoVectorPtr指向的物件。
In const std::unordered_map & Vertex::getEdges() const: returnedges; The error: UndirectedGraph.cpp:112:21: error: member reference base type'Vertex *const'isnota structureorunionedges= vit ->getEdges(); ~~~ ^ ~~~1error generated. --EDIT-...