deque<int>?ideq

增加函數(shù) ideq.push_front( x):雙端隊(duì)列頭部增加一個(gè)元素X

?ideq.push_back(x):雙端隊(duì)列尾部增加一個(gè)元素x

刪除函數(shù)ideq.pop_front():刪除雙端隊(duì)列中最前一個(gè)元素?

ideq.pop_back():刪除雙端隊(duì)列中最后一個(gè)元素?

ideq.clear():清空雙端隊(duì)列中元素

判斷函數(shù)ideq.empty() :向量是否為空，若true,則向量中無元素

大小函數(shù)ideq.size():返回向量中元素的個(gè)數(shù)。

#include <deque>

#include <iostream>

int main()

{

std::deque<int> a(10);

for (int i = 0; i < 10; i++)

{

a[i] = i;

}

std::cout << "The element of deque is ";

for (int i = 0; i < a.size(); i++)

{

std::cout << a.at(i) << " ";

}

std::cout << std::endl;

a.push_front(100);

std::cout << "Push 100 in the front. The element of deque is ";

for (int i = 0; i < a.size(); i++)

{

std::cout << a.at(i) << " ";

}

std::cout << std::endl;

a.push_back(99);

std::cout << "Push 99 in the back. The element of deque is ";

for (int i = 0; i < a.size(); i++)

{

std::cout << a.at(i) << " ";

}

std::cout << std::endl;

a.pop_back();

std::cout << "Pop back. The element of deque is ";

for (int i = 0; i < a.size(); i++)

{

std::cout << a.at(i) << " ";

}

std::cout << std::endl;

a.pop_front();

std::cout << "Pop front. The element of deque is ";

for (int i = 0; i < a.size(); i++)

{

std::cout << a.at(i) << " ";

}

std::cout << std::endl;

system("pause");

return 0;

}