容器适配器之queue

/*
//construct queue
queue(const container_type& ctnr = container_type())

ctnr
Container object.
[ctnr是一个容器类对象]
container_type is the type of the underlying container type (defined as an alias of the second class template parameter, Container; see member types).
[ctnr的数据类型container_type是内在容器的数据类型，即第二个模板参数Container]

A container adaptor keeps internally a container object as data. This container object is a copy of the ctnr argument passed to the constructor, if any, otherwise it is an empty container.
[queue会将一个容器对象作为数据，这个容器对象是传递到构造函数的参数ctnr，如果没有传递参数ctnr则为空容器]
*/

#include <iostream>
#include <deque>
#include <list>
#include <queue>

int main()
{
std::deque<int> mydeck(3, 100);
std::list<int> mylist(2, 200);

std::queue<int> first;                              // empty queue with deque as underlying container
std::queue<int> second(mydeck);                     // queue initialized to copy of deque with deque as underlying container

std::queue<int, std::list<int>> third;              // empty queue with list as underlying container
std::queue<int, std::list<int>> fourth(mylist);     // queue initialized to copy of list with list as underlying container

std::cout << "size of first: " << first.size() << '\n';
std::cout << "size of second: " << second.size() << '\n';
std::cout << "size of third: " << third.size() << '\n';
std::cout << "size of fourth: " << fourth.size() << '\n';

system("pause");
return 0;
}

/*
bool empty() const;
size_type size() const;
void push(const value_type& val);
void pop();
value_type& back();
value_type& front();
*/

#include <iostream>
#include <queue>

int main()
{
std::queue<int> myque;

for(int i=0; i<5; i++)
myque.push(i*10);

std::cout<<"myque contains: ";
while(!myque.empty())
{
std::cout<<myque.front()<<' ';
myque.pop();
}

std::cout<<'\n';

system("pause");
return 0;
}