1.at访问指定的元素,同时进行越界检查,若不在容器范围内,则抛出std::out_of_range类型的异常 2.operator[]访问指定的元素,此运算符决不插入新元素到容器。通过此运算符访问不存在的元素是未定义行为。 3.front 访问第一个元素,c.front()等价于*c.begin(); 4.back访问最后一个元素,c.back()等价于*sed::p...
std::vector C++ Containers library std::vector Defined in header<vector> template< classT, classAllocator=std::allocator<T> >classvector; (1) namespace { template<classT> usingvector=std::vector<T,std::pmr::polymorphic_allocator<T>>; ...
C++ Library - <vector> - Vectors are sequence container that can change size. Container is a objects that hold data of same type. Sequence containers store elements strictly in linear sequence.
Vector is a C library that allows you to hold a dynamic number of elements in one container which isn't limited in how many elements you can store just like a conventional array. Vector is inspired by std::vector from the C++'s STL library. Building and Installing libvector Installing lib...
<cassert> <ccomplex> <cctype> <cerrno> <cfenv> <cfloat> <charconv> <chrono> <cinttypes> <ciso646> <climits> <clocale> <cmath> <codecvt> <complex> <condition_variable> <csetjmp> <csignal> <cstdalign> <cstdarg> <cstdbool> <cstddef> <cstdint> <cstdio> <cstdlib> <cstring> <ct...
Standard library header<inplace_vector>(C++26) This header is part of thecontainerslibrary. Includes <compare> (C++20) Three-way comparison operatorsupport <initializer_list> (C++11) std::initializer_listclass template Classes inplace_vector ...
// vector_bool_ref_op_assign.cpp // compile with: /EHsc #include <vector> #include <iostream> #include <string> using namespace std; template <typename C> void print(const string& s, const C& c) { cout << s; for (const auto& e : c) { cout << e << " "; } cout << ...
// The C++ Standard Library often creates symbols longer than that. // The warning can be disabled: //#pragma warning(disable:4786) #include <iostream> #include <vector> #include <string> using namespace std; template <typename C> void print(const string& s, const C& c) { cout << ...
// The C++ Standard Library often creates symbols longer than that. // The warning can be disabled: //#pragma warning(disable:4786) #include <iostream> #include <vector> #include <string> using namespace std; template <typename C> void print(const string& s, const C& c) { cout << ...
有鉴于此,C++11新增了模板类array,它也位于名称空间std中。与数组一样,array对象的长度也是固定的,也使用栈(静态内存分配),而不是自由存储区,因此其效率与数组相同,但更方便更安全。使用方法:首先要创建array对象,需要包含头文件array.创建语法如下: 推而广之,下面的声明创建一个名为arr的array对象,它包含n_...