BSCS

Problem:

You have to serve 20 people in all.

•  space available in queue is for 10 people.
•  first person entering the queue will be served first.
•  people coming to pay the bill will be added 
• if yes (ask for amount)
• if no move next
• In every iteration you will ask the secrity guard if any person is served or not
• if yes ask number of user served and process them
• when every one is served print the total amount of payment recieved

Solution:

#include<iostream>

#include<conio.h>

using namespace std;

void enter_queue(int billing_array[], int &persons_in_queue, int &total_person_served){

char security = 'n';

if (total_person_served + persons_in_queue < 20){

cout << "To security guard:" << endl << "Is there any person to enter in queue? (press y for yes): ";

cin >> security;

if (security == 'y' && persons_in_queue < 10){

do{

cout << "Enter in queue, show your bill to security guard: ";

cin >> billing_array[persons_in_queue];

if (billing_array[persons_in_queue] < 0){

cout << "Wrong Input" << endl;

}

} while (billing_array[persons_in_queue] < 0);

persons_in_queue++;

} else if (persons_in_queue >= 10){

cout << endl << "No more space in queue....." << endl;

}

}

}

void people_served(int billing_array[], int &persons_in_queue, int &total_payment_recieved, int &total_person_served){

int person_served = 0;

cout << "To security guard:\nHow many user are served?\nNumber of user served are: ";

cin >> person_served;

//readjust/serve the person;

if (person_served <= persons_in_queue){

for(int i = 0; i < person_served; i++){

total_payment_recieved += billing_array[i];

billing_array[i] = billing_array[i+person_served];

persons_in_queue--;

}

for(int i = persons_in_queue; i < 10; i++){

billing_array[i] = 0;

}

total_person_served += person_served;

} else{

cout << "Person served Exceeds person in queue limit..." << endl;

}

}

void main(){

int billing_array[10] = {0};

int persons_in_queue = 0;

int total_payment_recived = 0;

int total_person_served = 0;

while(total_person_served < 20){

//entry point queue;

enter_queue(billing_array, persons_in_queue, total_person_served);

people_served(billing_array, persons_in_queue, total_payment_recived, total_person_served);

//print queue;

cout << endl << "Queue status;" << endl;

for (int i = 0; i < 10; i++){

cout << billing_array[i] << endl;

}

cout << endl;

}

cout << endl << "Total Payment Recived: " << total_payment_recived;

_getch();

}