(y)));// 擦除template<classT,classAllocator,classU=T>typenamedeque<T, Allocator>::size_typeerase(deque<T, Allocator>&c,constU&value);template<classT,classAllocator,classPredicate>typenamedeque<T, Allocator>::size_typeerase_if(deque<T, Allocator>&c, Predicate pred);namespacepmr{template<...
c. front(): Access the first element of the deque 访问容器中的第一个元素reference front(); const_reference front() const;Returns a reference to the first element in the deque container.该方法返回容器中首元素的引用或const引用,而begin()方法返回指向首元素的迭代器。该方法的时间复杂度为constant...
#include <deque> #include <queue> #include<iostream> int main(int argc, char const *argv[]) { int a=1, b=2, c=3; std::queue<int> odomQueue; odomQueue.push(a); odomQueue.push(b); odomQueue.push(c); std::cout<<"odomQueue.back()="<<odomQueue.back()<<std::endl;//3 std...
std::deque<int> c1(3, 100); //初始化一个int行的双端队列c1，此时c1 = {100, 100, 100}auto it = c1.begin();it = c1.insert(it, 200); //在it前插入元素200//c1 = {200，100, 100, 100}c1.insert(it, 2, 300); //在it前插入两个元素值都为300//c1 = {300，300，200，100,...
a b c deque::const_reference (STL/CLR)要素への定数参照の型です。構文C++ コピー typedef value_type% const_reference; 解説この型は、要素への定数参照を表します。例C++ コピー // cliext_deque_const_reference.cpp // compile with: /clr #include <cliext/deque> int main() { cliext::...
std::deque<T, Alloc>::size_type erase_if( std::deque<T, Alloc>& c, Pred pred ); (2) (C++20 起) 1) 从容器中擦除所有比较等于 value 的元素。等价于 auto it = std::remove(c.begin(), c.end(), value); auto r = std::distance(it, c.end()); c.erase(it, c.end());...
_Tpvalue_type; typedef _Ptrpointer; typedef _Refreference; typedef
typedef typename Allocator::const_reference const_reference; 注解const_reference 类型不能用于修改元素的值。示例C++ 复制 // deque_const_ref.cpp // compile with: /EHsc #include <deque> #include <iostream> int main( ) { using namespace std; deque <int> c1; c1.push_back( 10 ); c1.pus...
元素的插入和删除可能导致内存的重新分配,所以任何插入和删除的动作都可能使所有指向deque元素的pointers、reference、iterators失效。唯一例外的是在头部或尾部插入元素,pointers和reference依然有效,但是iterators会失效。 4、示例代码 //cont/deque1. cpp#include<iostream>#include<deque>#include<string>#include<algorithm...
std::deque<T, Alloc>::size_type erase_if( std::deque<T, Alloc>& c, Pred pred ); (2) (since C++20) 1) Erases all elements that compare equal to value from the container. Equivalent to auto it = std::remove(c.begin(), c.end(), value); auto r = c.end() - it; c....