Queue constructor
Syntax:
#include <queue> queue(); queue( const Container& con );
Queues have a default constructor as well as a copy constructor that will create a new queue out of the container con.
For example, the following code creates a queue of strings, populates it with input from the user, and then displays it back to the user:
queue<string> waiting_line;
while( waiting_line.size() < 5 ) {
cout << "Welcome to the line, please enter your name: ";
string s;
getline( cin, s );
waiting_line.push(s);
}
while( !waiting_line.empty() ) {
cout << "Now serving: " << waiting_line.front() << endl;
waiting_line.pop();
}
When run, the above code might produce this output:
Welcome to the line, please enter your name: Nate Welcome to the line, please enter your name: lizzy Welcome to the line, please enter your name: Robert B. Parker Welcome to the line, please enter your name: ralph Welcome to the line, please enter your name: Matthew Now serving: Nate Now serving: lizzy Now serving: Robert B. Parker Now serving: ralph Now serving: Matthew