This C++ Program demonstrates implementation of Queue in STL.
Here is source code of the C++ Program to demonstrate Queue in STL. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.
/** C++ Program to Implement Queue in Stl*/#include <iostream>#include <queue>#include <string>#include <cstdlib>using namespace std;
int main()
{queue<int> q;
int choice, item;
while (1)
{cout<<"\n---------------------"<<endl;
cout<<"Queue Implementation in Stl"<<endl;
cout<<"\n---------------------"<<endl;
cout<<"1.Insert Element into the Queue"<<endl;
cout<<"2.Delete Element from the Queue"<<endl;
cout<<"3.Size of the Queue"<<endl;
cout<<"4.Front Element of the Queue"<<endl;
cout<<"5.Last Element of the Queue"<<endl;
cout<<"6.Exit"<<endl;
cout<<"Enter your Choice: ";
cin>>choice;
switch(choice)
{case 1:
cout<<"Enter value to be inserted: ";
cin>>item;
q.push(item);
break;
case 2:
item = q.front();
q.pop();
cout<<"Element "<<item<<" Deleted"<<endl;
break;
case 3:
cout<<"Size of the Queue: ";
cout<<q.size()<<endl;
break;
case 4:
cout<<"Front Element of the Queue: ";
cout<<q.front()<<endl;
break;
case 5:
cout<<"Back Element of the Queue: ";
cout<<q.back()<<endl;
break;
case 6:
exit(1);
break;
default:
cout<<"Wrong Choice"<<endl;
}}return 0;
}
$ g++ queue.cpp $ a.out --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 1 Enter value to be inserted: 9 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 1 Enter value to be inserted: 8 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 1 Enter value to be inserted: 7 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 1 Enter value to be inserted: 6 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 1 Enter value to be inserted: 5 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 1 Enter value to be inserted: 4 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 3 Size of the Queue: 6 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 4 Front Element of the Queue: 9 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 5 Back Element of the Queue: 4 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 2 Element 9 Deleted --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 3 Size of the Queue: 5 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 4 Front Element of the Queue: 8 --------------------- Queue Implementation in Stl --------------------- 1.Insert Element into the Queue 2.Delete Element from the Queue 3.Size of the Queue 4.Front Element of the Queue 5.Last Element of the Queue 6.Exit Enter your Choice: 6 ------------------ (program exited with code: 1) Press return to continue
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