Question

 14.11 LAB: Ticketing service (queue)

 Given main(). complete the program to add people to a queue. The program should read in a list of people's names including "You" (ending with-1), adding each person to the peopleInQueue queue. Then, remove each person from the queue until "You" is at the head of the queue. Include print statements as shown in the example below.

 Ex. If the input is:

 Zadie Smith

 Tom Sawyer

 You

 Louisa Alcott

 -1

 the output is:

 Welcome to the ticketing service...

 You are number 3 in the queue.

 Zadie Smith has purchased a ticket.

 You are now number 2

 Tom Sawyer has purchased a ticket.

 You are now number 1

 You can now purchase your ticket!

-------------mian.cpp

#include
#include

using namespace std;

int main (int argc, char* argv[]) {
string personName = "";
int counter = 0;
int youPosition;

queuepeopleInQueue;

getline(cin, personName);
while (personName != "-1") {
// TODO: Add personName to peopleInQueue
// determine position of "You" (youPosition)

getline(cin, personName);
}

cout << "Welcome to the ticketing service... " << endl;
cout << "You are number " << youPosition << " in the queue." << endl;

// TODO: In a loop, remove head person from peopleInQueue,
// output their name and that they have purchased a ticket,
// then output your position in the queue. When you are at
// the head, output that you can purchase your ticket.

return 0;
}

Answer 1

#include
#include

using namespace std;

int main (int argc, char* argv[]) {
   string personName = "";
   int counter = 0;
   int youPosition;
  
   queue peopleInQueue;
  
   getline(cin, personName);
   while (personName != "-1") {
       counter++;
       if(personName == "You")
           youPosition = counter;
          
       peopleInQueue.push(personName);
       getline(cin, personName);
   }
  
   cout << "Welcome to the ticketing service... " << endl;
   cout << "You are number " << youPosition << " in the queue." << endl;
   while (youPosition != 1) {
   cout << peopleInQueue.front() <<" has purchased ticket." << endl;
       youPosition--;
       peopleInQueue.pop();
       cout << "You are now number "<    }
   cout <<"You can now purchase your ticket!" <    return 0;
}

Screenshot of the program :

Output :

Output 2 :

Output 3 :

Answer 2

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. If not, PLEASE let me know before you rate, I’ll help you fix whatever issues. Thanks

#include

#include

using namespace std;

int main (int argc, char* argv[]) {

                string personName = "";

                int counter = 0;

                int youPosition=-1;

               

                queue peopleInQueue;

               

                getline(cin, personName);

                while (personName != "-1") {

                                //simply adding personName to the queue

                                peopleInQueue.push(personName);    

                                //if the name of person is "You", setting current size as youPosition

                                if(personName=="You"){

                                                youPosition=peopleInQueue.size();

                                }

                                //reading next name

                                getline(cin, personName);

                }

               

                //if user did not enter 'You', displaying error and quitting

                if(youPosition==-1){

                                cout<<"'You' not found!"<

                                return 0;

                }

               

                cout << "Welcome to the ticketing service... " << endl;

                cout << "You are number " << youPosition << " in the queue." << endl;

               

                // looping until 'You' is at the front of the queue

                while(peopleInQueue.front()!="You"){

                                //fetching front name from queue, removing it

                                personName=peopleInQueue.front();

                                peopleInQueue.pop();

                                //displaying the removed guy's name

                                cout<

                                //updating youPosition

                                youPosition--;

                                //displaying updated position

                                cout << "You are number " << youPosition << endl;

                }

                //displaying that "You" is at the front of the queue; can now purchase the ticket

                cout<

                return 0;

}

/*INPUT*/

Zadie Smith

Tom Sawyer

You

Louisa Alcott

-1

/*OUTPUT*/

Welcome to the ticketing service...

You are number 3 in the queue.

Zadie Smith has purchased a ticket.

You are number 2

Tom Sawyer has purchased a ticket.

You are number 1

You can now purchase your ticket!