const_referenceconstvalue_type& pointer Allocator::pointer (until C++11) std::allocator_traits<Allocator>::pointer (since C++11) const_pointer Allocator::const_pointer (until C++11) std::allocator_traits<Alloca
我们可以用返回的迭代器继续在这个vector上迭代。所以，对于【C/C++ 踩坑修炼系列】vector 使用 erase ...
#include <algorithm> #include <cassert> #include <iterator> #include <vector> #include <list> int main() { auto container = std::vector{1, 2, 3, 4}; auto pos = std::next(container.begin(), 2); assert(*pos == 3); const auto rg = std::list{-1, -2, -3}; #ifdef __cp...
#include <vector>#include <iostream>voidprint_container(conststd::vector<int>&c){for(inti:c)std::cout<<i<<" ";std::cout<<'\n';}intmain(){std::vector<int>c{0,1,2,3,4,5,6,7,8,9};print_container(c);c.erase(c.begin());print_container(c);c.erase(c.begin()+2, c.begi...
#include <cassert> #include <initializer_list> #include <iostream> #include <vector> void println(auto rem, const std::vector<bool>& vb) { std::cout << rem << " = ["; for (std::size_t t{}; t != vb.size(); ++t) std::cout << (t ? ", " : "") << vb[t]; std...
std::vector<char> c; c.assign(5,'a');//此时c = {'a','a','a','a','a'} const std::string str(6,'b'); c.assign(str.begin(), str.end());//此时c = {'b','b','b','b','b','b'} c.assign({'C','+','+','1','1'});//此时c = {'C','+','+','1'...
http://en.cppreference.com/w/cpp/container/vector/data vector 的 data 方法是在C++11中才被支持...
() noexcept;12const_reverse_iterator rbegin()constnoexcept;1314//将vector反转构的结束指针返回(其实就是原来的begin-1)15reverse_iterator rend() noexcept;16const_reverse_iterator rend()constnoexcept;1718//为了便于得到const_iterator类型的返回值,C++11引入了cbegin和cend19//用法与begin和end相同,但返回的...
7 c.swap(c2) 置换c和c2的数据 8 swap(c1,c2) 置换c1和c2的数据 元素访问(Element Access) 下表列出了所有访问vector元素的方法,对于所有non-const元素,返回的都是元素的reference,这些操作中,只有at()会检查边界,如果越界,抛出out_of_range异常。—— 序号操作效果 1 c[index] 返回索引index所指向的元素 ...
我阅读了std::vector的扣除指南从使用cppreference. 示例: #include <vector> int main() { std::vector<int> v = {1, 2, 3, 4}; std::vector x{v.begin(), v.end()}; // uses explicit deduction guide } 所以,我对此有一些疑问: