1 #include<cstdio> 2 #include<queue> 3 #include<iostream> 4 using namespace std; 5 6 int main() 7 { 8 queue<int>Q; 9 cout<<Q.size()<<endl; 10 for(int i=0;i<5;i++) 11 { 12 Q.push(i); 13 } 14 cout<<Q.front()<<endl; 15 cout<<Q.back()<<endl; 16 cout<<Q.empty()<<endl; 17 for(int i=0;i<5;i++) 18 { 19 Q.pop(); 20 } 21 return 0; 22 }ueue