push() pop() size() empty() front() back() push() 队列中由于是先进先出,push即在队尾插入一个元素,如:可以输出:Hello World! queue<string> q; q.push("Hello World!"); q.push("China"); cout<<q.front()<<endl; pop() 将队列中最靠前位置的元素拿掉,是没有返回值的void函数。如:可以...
【简答题】9-11 在标准 C++类库中,队列类(queue)的成员函数 queue::push()在队列一端添加元素,queue::pop()从非空的队列中删除最后一个元素,queue::empty()判断队列是否为空, queue::back()返回非空队列的最后一个元素,queue::front()返回非空队列的第一个元素,queue::size()返回队列中元素的个数,请构...
Adds an element to the back of the queue.复制 void push( const Type& val ); Parametersval The element added to the back of the queue.RemarksThe back of the queue is the position occupied by the most recently added element and is the last element at the end of the container....
队列为空时调用 front 或back:这不会导致运行时错误,但如果你期望队列中有元素而实际上它是空的,那么你的程序逻辑可能就有问题了。为了避免这种情况,你可以在调用 front 或back 之前检查队列是否为空(使用 empty 方法)。 内存分配失败:虽然 std::queue 本身不会直接处理内存分配失败的情况,但如果你使用的底层容器...
std::queue::push C++98 C++11 void push (const value_type& val); Insert element Inserts a new element at the end of thequeue, after its current last element. The content of this new element is initialized toval. This member function effectively calls the member functionpush_backof theunder...
Pushes the given elementvalueto the end of the queue. 1)Effectively callsc.push_back(value). 2)Effectively callsc.push_back(std::move(value)). Parameters value-the value of the element to push Return value (none) Complexity Equal to the complexity ofContainer::push_back. ...
push_back(value); std::push_heap(c.begin(), c.end(), comp); 2) 等效地调用 c.push_back(std::move(value)); std::push_heap(c.begin(), c.end(), comp); 参数 value - 要推入的元素值 返回值 (无) 复杂度 对数次比较加 Container::push_back 的复杂度。 参阅 emplace (C++11) ...
ivec.pop_back(); print_ivec(ivec.begin(), ivec.end()); ivec.push_back(99); push_heap(ivec.begin(), ivec.end()); print_ivec(ivec.begin(), ivec.end()); sort_heap(ivec.begin(), ivec.end()); print_ivec(ivec.begin(), ivec.end()); ...
pushback pushball push-bike pushbutton push-button push-button radio pushcart pushchair pushdown push-down list push-down queue push-down stack push-down storage push-down store pushed pusher pusher barge pushful pushfully pushfulness push-in ...
Feedback In this article Syntax Return value Requirements See also Push a copy of retrieval filter currently on the top of the retrieval-filter stack onto the retrieval-filter stack. Syntax C++ HRESULTPushCopyOfRetrievalFilter(); Return value ...