deque特有函数事例

#include <bits/stdc++.h>
using namespace std;
int main(){
    int x[] = {2,3,4,5,6,7};
    deque<int> a(x,x+sizeof(x)/sizeof(int));
    cout<<"初始值:";
    for(int i = 0;i<a.size();i++){
        cout<<a[i]<<" ";
    }
    cout<<endl;
    a.push_front(1);
    cout<<"二次值:";
    for(int i = 0;i<a.size();i++){
        cout<<a[i]<<" ";
    }
    cout<<endl;
    a.pop_front();
    cout<<"三次值:";
    for(int i = 0;i<a.size();i++){
        cout<<a[i]<<" ";
    }
    cout<<endl;
    cout<<"第一个元素:"<<a.front()<<endl;
    cout<<"最后一个元素:"<<a.back();
    return 0;
}