object oriented programming

[saltyyyyy]

hello everyone, I am facing a problem in displaying the output
here is the code

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

class Audience{
protected:
string name;
int age, seatNo;
public:
Audience(string name, int age, int seatNo)
{
this->name = name;
this->age = age;
this->seatNo=seatNo;
}
int getAge() const
{
return age;
}
virtual void displayDetails()
{

}
virtual double calcDisc() = 0;
};

class Adults: public Audience{ //inheritance
public:
Adults(string name="", int age=0, int seatNo=0): Audience(name, age, seatNo)
{}
void displayDetails()
{
cout << setw(30) << name << setw(5) << age
<< setw(40) << "-" << setw(9) << seatNo << endl;
}
double calcDisc()
{
if (age >= 60)
return 20;
}
};

class Kids: public Audience{ //inheritance
private:
string parentName;
public:
Kids(string name="", int age=0, int seatNo=0, string parentName=""):Audience(name, age, seatNo)
{
this->parentName = parentName;
}
void displayDetails()
{
cout << setw(30) << name << setw(5) << age
<< setw(40) << parentName << setw(9) << seatNo << endl;
}
double calcDisc()
{
double discount;

if(age <= 2)
{
discount = 100;
}
else if(age <= 12)
{
discount = 20;
}

return discount;
}
};

class Date{
private:
int day, month, year;
public:
void dispDate()
{
cout << setprecision(2) << day << "-" << setprecision(2) << month << "-" << setprecision(4) << year;
}
void readDate()
{
char dummy;
cin >> day >> dummy >> month >> dummy >> year;
}
};

class Time{
private:
int hour, minute;
public:
void dispTime()
{
string time;
if (hour <= 11)
{
time = "am";
}
else
{
time = "pm";
}

cout << hour << ":" << minute << " " << time;
}
void readTime()
{
char dummy;
cin >> hour >> dummy >> minute;
}
};

class Movie{
private:
string title;
bool seat[50];
double price;
int numAdults, numKids;
int numAudience, hallNo;
Audience* audienceList[20]; //aggregation with class audience
Date d;
Time t;
public:
Movie()
{
numAdults = 0;
numKids = 0;
numAudience = 0;
}

string getTitle()
{
return title;
}

bool getSeat(int s)
{
bool value;

if(seat[s+1] == true) //check whether array have value or not
{
value = false;
}
else
{
value = true;
}
return value;
}

void setSeat(int s)
{
s = seat[s+1];
}

void addAudience(Audience* audience)
{
audienceList[numAudience] = audience;

if (audience->getAge()<=12)
{
numKids++;
}
else
{
numAdults++;
}

numAudience++;
}

void getDateTime()
{
cout << "(" ;
d.dispDate();
cout << ", ";
t.dispTime();
cout << ")" << endl;
}

void readInput()
{
cout << "Title: ";
cin.ignore();
getline(cin, title);
cout << "Hall: ";
cin >> hallNo;
cout << "Ticket price: RM";
cin >> price;
cout << "Date [dd-mm-yyyy]: ";
d.readDate();
cout << "Time [hour:min] using 24-hour format: ";
t.readTime();
}

void displayInfoMovie()
{
cout << setw(7) << "Title" << ": " << title << endl;
cout << setw(7) << "Hall" << ": " << hallNo << endl;
cout << setw(7) << "Date" << ": ";
d.dispDate();
cout << endl;
cout << setw(7) << "Time" << ": ";
t.dispTime();
cout << endl;
cout << setw(7) << "Price" << ": RM" << fixed << setprecision(2) << price << endl;
}

void displayInfoAudience()
{
if (numAudience == 0)
{
cout << "No audience!" << endl;
}
else
{
cout << setw(18) << "Number of Audience" << ": " << numAudience << endl
<< setw(18) << "Number of Adults" << ": " << numAdults << endl
<< setw(18) << "Number of Kids" << ": " << numKids << endl;

cout << endl
<< setw(4) << "No" << setw(30) << "Name" << setw(5) << "Age"
<< setw(40) << "Parent Name" << setw(9) << "Seat No." << "Ticket (RM)" << endl;

double total = 0;

for (int i=0; i<numAudience; i++)
{
cout << setw(4) << i+1 ;
audienceList[i]->displayDetails();
price *= audienceList[i]->calcDisc();
cout << fixed << setprecision(2) << price << endl;
cout << endl;
total += price;
}

cout << "Total ticket price = RM" << fixed << setprecision(2) << total << endl;
}
}
};

int displayMenu()
{
int choice;
cout << "========== Menu ==========" << endl
<< endl
<< "[1] Add Movie" << endl
<< "[2] Add Audience" << endl
<< "[3] Display Movies" << endl
<< "[4] Display Audiences" << endl
<< "[5] Exit" << endl
<< "==========================" << endl
<< endl
<< "Select task: ";
cin >> choice;
cout << endl;

return choice;
}


int main()
{
int choice;
Movie movie[10];
int count = 0;
Audience *A;

choice = displayMenu();

while(choice >=1 && choice <= 5)
{
switch(choice)
{
case 1:
{
for(int i=0; i<=count; i++)
{
cout << "<<< Add Movie >>>" << endl;
movie[i].readInput();
}
count++;
break;
}

case 2:
{

char choice2 = 'y';
int choice3;
cout << "<<< Add Audience >>>" << endl;
cout << endl;
cout << "Movie List" << endl;

for(int i=0; i<count; i++)
{
cout << i+1 << ") " << movie[i].getTitle();
movie[i].getDateTime();
cout << endl;

cout << "Select movie: ";
cin >> choice3;

cout << endl
<< "--- Enter Audience Info ---" << endl;

string name, pname;
int age, seatNo;

while (choice2 == 'y')
{
cout << left;
cout << setw(7) << "Name" << ": ";
cin.ignore();
getline(cin, name);
cout << setw(7) << "Age" << ": ";
cin >> age;
if(age > 12)
{
cout << setw(7) << "Seat No" << ": ";
cin >> seatNo;
cout << endl;

if(movie[choice3+1].getSeat(seatNo) == false)
{
cout << "Seat unavailable, choose others!" << endl << endl;
cin >> seatNo;
}

Adults ad;
A = &ad;
movie[i].addAudience(A);
}
else
{
cout << "Parent Name: ";
cin >> pname;

Kids k;
A = &k;
movie[i].addAudience(A);

}

cout << endl
<< "Press 'Y' to continue >> ";
cin >> choice2;
cout << endl
<< "--- Enter Audience Info ---" << endl;
}

}



break;
}

case 3:
{
if (count == 0)
{
cout << "Sorry!! No movie data to display..." << endl;
}
else
{
cout << "<<< Movie Info >>>" << endl;
cout << endl
<< "Number of Movies: " << count << endl;

for(int i=0; i<count; i++)
{
cout << endl
<< "Movie #" << i+1;
movie[i].displayInfoAudience();
}
}
break;
}

case 4:
{
if (count == 0)
{
cout << "Sorry!! No movie, please add movie first..." << endl;
}
else
{
cout << "<<< Movie(s) and Audience(s) Info >>>" << endl;
cout << endl
<< "Number of Movies: " << count << endl;

for(int i=0; i<count; i++)
{
cout << endl
<< "Movie #" << i+1 << endl;
movie[i].displayInfoMovie();
cout << endl;
movie[i].displayInfoAudience();
}
}
break;
}

default:
{
cout << "Thank you! :)" << endl;
exit(0);
break;
}
}
cout << endl;
choice = displayMenu();
}

return 0;
}

[kbw]

There are number of problems with your program. The bottom line is it's not using OO properly. Unline Java, C++ isn't just an object oriented programming language, and from the C++ point of view, not everything is an object.

It would be helpful if you posted what you expect and what you see.

Also, welcome to the forum.

Please use the code format tags to format your code.

[saltyyyyy]

this should be the output after we enter the movie and value

========== Menu ==========
[1] Add Movie
[2] Add Audience
[3] Display Movies
[4] Display Audiences
[5] Exit
==========================
Select task: 4
<<< Movie(s) and Audience(s) Info >>>
Number of Movies: 1
Movie #1
Title: Jumanji 2
Hall : 3
Date : 30-05-2020
Time : 11:30 am
Price: RM28.00
Number of Audience: 2
Number of Adults : 1
Number of Kids : 1
No Name Age Parent Name Seat No Ticket (RM)
1. Afiqah Salim 28 - 4 28.00
2. Auni Nazri 2 Afiqah Salim 4 0.00
Total ticket price = RM28.00

[saltyyyyy]

but the output i get is without all the details like below:

========== Menu ==========
[1] Add Movie
[2] Add Audience
[3] Display Movies
[4] Display Audiences
[5] Exit
==========================
Select task: 4
<<< Movie(s) and Audience(s) Info >>>
Number of Movies: 1
Movie #1
Title: Jumanji 2
Hall : 3
Date : 30-05-2020
Time : 11:30 am
Price: RM28.00
Number of Audience: 2
Number of Adults : 1
Number of Kids : 1
No Name Age Parent Name Seat No Ticket (RM)

[seeplus]

However, THERE IS A MAJOR PROBLEM with the lines .addAudience(). You're storing pointers in audienceList array. However these pointers are only valid for the scope of the associated objects ad and k. Once these go out of scope at the end of the block, then their addresses are no longer valid!! Also, the data for these objects are not set.

For a first revision, consider (not tested):

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

class Audience {
protected:
	string name;
	int age {}, seatNo {};

public:
	Audience() {}
	Audience(const string& name_, int age_, int seatNo_) : name(name_), age(age_), seatNo(seatNo_) {}
	virtual ~Audience() {}

	int getAge() const { return age; }
	virtual void displayDetails() const {}
	virtual double calcDisc() const = 0;
};

class Adults : public Audience {
public:
	Adults() {}
	Adults(const string& name_ , int age_, int seatNo_) : Audience(name_, age_, seatNo_) {}

	void displayDetails() const override
	{
		cout << setw(30) << name << setw(5) << age
			<< setw(40) << "-" << setw(9) << seatNo << '\n';
	}

	double calcDisc() const override
	{
		return age >= 60 ? 60 : age;
	}
};

class Kids : public Audience {
private:
	string parentName;

public:
	Kids() {}
	Kids(string name_, int age_, int seatNo_, const string& parentName_) :Audience(name_, age_, seatNo_), parentName(parentName_) {}
	void displayDetails() const override
	{
		cout << setw(30) << name << setw(5) << age
			<< setw(40) << parentName << setw(9) << seatNo << '\n';
	}

	double calcDisc() const override
	{
		double discount {};

		if (age <= 2)
			discount = 100;
		else if (age <= 12)
			discount = 20;

		return discount;
	}
};

class Date {
private:
	int day {}, month {}, year {};

public:
	void dispDate() const
	{
		cout << setprecision(2) << day << "-" << setprecision(2) << month << "-" << setprecision(4) << year;
	}

	void readDate()
	{
		char dummy {};

		cin >> day >> dummy >> month >> dummy >> year;
	}
};

class Time {
private:
	int hour {}, minute {};

public:
	void dispTime() const
	{
		const string time {hour <= 11 ? "am" : "pm"};

		cout << hour << ":" << minute << " " << time;
	}

	void readTime()
	{
		char dummy {};

		cin >> hour >> dummy >> minute;
	}
};

class Movie {
private:
	string title;
	bool seat[50] {};
	mutable double price {};
	int numAdults {}, numKids {};
	int numAudience {}, hallNo {};
	Audience* audienceList[20] {}; //aggregation with class audience
	Date d;
	Time t;

public:
	Movie() {}

	~Movie()
	{
		for (size_t a = 0; a < 20; ++a)
			delete audienceList[a];
	}

	string getTitle() const { return title; }

	bool getSeat(int s) const {	return !seat[s + 1]; }
	void setSeat(int s) { seat[s + 1] = true; }

	void addAudience(Audience* audience)
	{
		audienceList[numAudience] = audience;

		if (audience->getAge() <= 12)
			++numKids;
		else
			++numAdults;

		++numAudience;
	}

	void getDateTime() const
	{
		cout << "(";
		d.dispDate();

		cout << ", ";
		t.dispTime();

		cout << ")\n";
	}

	void readInput()
	{
		cout << "Title: ";
		cin.ignore();
		getline(cin, title);

		cout << "Hall: ";
		cin >> hallNo;

		cout << "Ticket price: RM";
		cin >> price;

		cout << "Date [dd-mm-yyyy]: ";
		d.readDate();

		cout << "Time [hour:min] using 24-hour format: ";
		t.readTime();
	}

	void displayInfoMovie() const
	{
		cout << setw(7) << "Title" << ": " << title << '\n';
		cout << setw(7) << "Hall" << ": " << hallNo << '\n';
		cout << setw(7) << "Date" << ": ";
		d.dispDate();
		cout << '\n';
		cout << setw(7) << "Time" << ": ";
		t.dispTime();
		cout << '\n';
		cout << setw(7) << "Price" << ": RM" << fixed << setprecision(2) << price << '\n';
	}

	void displayInfoAudience() const
	{
		if (numAudience == 0)
			cout << "No audience!\n";
		else {
			cout << setw(18) << "Number of Audience" << ": " << numAudience << '\n'
				<< setw(18) << "Number of Adults" << ": " << numAdults << '\n'
				<< setw(18) << "Number of Kids" << ": " << numKids << '\n';

			cout << '\n'
				<< setw(4) << "No" << setw(30) << "Name" << setw(5) << "Age"
				<< setw(40) << "Parent Name" << setw(9) << "Seat No." << "Ticket (RM)" << '\n';

			double total {};

			for (int i = 0; i < numAudience; ++i) {
				cout << setw(4) << i + 1;
				audienceList[i]->displayDetails();
				price *= audienceList[i]->calcDisc();
				cout << fixed << setprecision(2) << price << '\n';
				cout << '\n';
				total += price;
			}

			cout << "Total ticket price = RM" << fixed << setprecision(2) << total << '\n';
		}
	}
};

int displayMenu()
{
	int choice {};

	cout << "========== Menu ==========\n\n"
		<< "[1] Add Movie\n"
		<< "[2] Add Audience\n"
		<< "[3] Display Movies\n"
		<< "[4] Display Audiences\n"
		<< "[5] Exit\n"
		<< "==========================\n\n"
		<< "Select task: ";

	cin >> choice;
	cout << '\n';

	return choice;
}

int main()
{
	Movie movie[10];
	int count {};

	auto choice {displayMenu()};

	while (choice >= 1 && choice <= 5) {
		switch (choice) {
			case 1:
				for (int i = 0; i <= count; ++i) {
					cout << "<<< Add Movie >>>\n";
					movie[i].readInput();
				}

				++count;
				break;

			case 2:
			{
				char choice2 {'y'};
				int choice3 {};

				cout << "<<< Add Audience >>>\n";
				cout << '\n';
				cout << "Movie List\n";

				for (int i = 0; i < count; ++i) {
					cout << i + 1 << ") " << movie[i].getTitle();
					movie[i].getDateTime();
					cout << '\n';

					cout << "Select movie: ";
					cin >> choice3;

					cout << "\n--- Enter Audience Info ---\n";

					string name, pname;
					int age {}, seatNo {};

					while (choice2 == 'y') {
						cout << left;
						cout << setw(7) << "Name" << ": ";
						cin.ignore();
						getline(cin, name);

						cout << setw(7) << "Age" << ": ";
						cin >> age;

						if (age > 12) {
							cout << setw(7) << "Seat No" << ": ";
							cin >> seatNo;
							cout << '\n';

							if (movie[choice3 + 1].getSeat(seatNo) == false) {
								cout << "Seat unavailable, choose others!\n\n";
								cin >> seatNo;
							}

							movie[i].addAudience(new Adults(name, age, seatNo));
						} else {
							cout << "Parent Name: ";
							cin >> pname;

							movie[i].addAudience(new Kids (name, age, seatNo, pname));
						}

						cout << "\nPress 'Y' to continue >> ";
						cin >> choice2;
						cout << "\n--- Enter Audience Info ---\n";
					}
				}
				break;
			}

			case 3:
				if (count == 0)
					cout << "Sorry!! No movie data to display...\n";
				else {
					cout << "<<< Movie Info >>>\n";
					cout << "\nNumber of Movies: " << count << '\n';

					for (int i = 0; i < count; ++i) {
						cout << "\nMovie #" << i + 1;
						movie[i].displayInfoAudience();
					}
				}
				break;

			case 4:
				if (count == 0)
					cout << "Sorry!! No movie, please add movie first..." << endl;
				else {
					cout << "<<< Movie(s) and Audience(s) Info >>>\n";
					cout << "\nNumber of Movies: " << count << '\n';

					for (int i = 0; i < count; ++i) {
						cout << "\nMovie #" << i + 1 << '\n';
						movie[i].displayInfoMovie();
						cout << '\n';
						movie[i].displayInfoAudience();
					}
				}
				break;

			default:
				cout << "Thank you! :)\n";
				exit(0);
		}

		cout << '\n';
		choice = displayMenu();
	}
}

[saltyyyyy]

I had a test run the code and I get the price of the movie is dummy value?
and also I faced a problem in adding the movie and adding the audience, I have no idea how to deal with it

[seeplus]

Well have a look at the code for Add Movie. The first time its called then count is 0 so the for loop executes once. The second time it's called then count is 1 and the for loop executes twice. Then the next time 3 times etc. This probably isn't what is wanted........

[saltyyyyy]

but I can take out the count since I need it to display all the output right?
is it we can use another loop instead of for loop?

[saltyyyyy]

here is the code i had modified

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

class Audience{
protected:
string name;
int age, seatNo;
public:
Audience(string name, int age, int seatNo)
{
this->name = name;
this->age = age;
this->seatNo=seatNo;
}
int getAge() const
{
return age;
}
virtual void displayDetails()
{

}
virtual double calcDisc() = 0;
};

class Adults: public Audience{ //inheritance
public:
Adults(string name="", int age=0, int seatNo=0): Audience(name, age, seatNo)
{}
void displayDetails()
{
cout << setw(20) << name << setw(8) << age
<< setw(20) << "-" << setw(8) << seatNo;
}
double calcDisc()
{
if (age >= 60)
return 0.8;
else
return 1;
}
};

class Kids: public Audience{ //inheritance
private:
string parentName;
public:
Kids(string name="", int age=0, int seatNo=0, string parentName=""):Audience(name, age, seatNo)
{
this->parentName = parentName;
}
void displayDetails()
{
cout << setw(20) << name << setw(8) << age
<< setw(20) << parentName << setw(8) << seatNo;
}
double calcDisc()
{
double discount;

if(age <= 2)
{
discount = 0;
}
else if(age <= 12)
{
discount = 0.8;
}

return discount;
}
};

class Date{
private:
int day, month, year;
public:
void dispDate()
{
cout << setprecision(2) << day << "-" << setprecision(2) << month << "-" << setprecision(4) << year;
}
void readDate()
{
char dummy;
cin >> day >> dummy >> month >> dummy >> year;
}
};

class Time{
private:
int hour, minute;
public:
void dispTime()
{
string time;
if (hour <= 11)
{
time = "am";
}
else
{
time = "pm";
}

cout << hour << ":" << minute << " " << time;
}
void readTime()
{
char dummy;
cin >> hour >> dummy >> minute;
}
};

class Movie{
private:
string title;
bool seat[50];
double price;
int numAdults, numKids;
int numAudience, hallNo;
Audience* audienceList[20]; //aggregation with class audience
Date d;
Time t;
public:
Movie()
{
price = 0.0;
numAdults = 0;
numKids = 0;
numAudience = 0;
}

string getTitle()
{
return title;
}

bool getSeat(int s)
{
bool value;

if(seat[s+1] == true) //check whether array have value or not
{
value = false;
}
else
{
value = true;
}
return value;
}

void setSeat(int s)
{
seat[s + 1] = true;
}

void addAudience(Audience* audience)
{
audienceList[numAudience] = audience;

if (audience->getAge() <= 12)
{
++numKids;
}
else
{
++numAdults;
}

++numAudience;
}

void getDateTime()
{
cout << "(" ;
d.dispDate();
cout << ", ";
t.dispTime();
cout << ")\n";
}

void readInput()
{
cout << "Title: ";
cin.ignore();
getline(cin, title);
cout << "Hall: ";
cin >> hallNo;
cout << "Ticket price: RM";
cin >> price;
cout << "Date [dd-mm-yyyy]: ";
d.readDate();
cout << "Time [hour:min] using 24-hour format: ";
t.readTime();
}

void displayInfoMovie()
{
cout << setw(7) << "Title" << ": " << title << endl;
cout << setw(7) << "Hall" << ": " << hallNo << endl;
cout << setw(7) << "Date" << ": ";
d.dispDate();
cout << endl;
cout << setw(7) << "Time" << ": ";
t.dispTime();
cout << endl;
cout << setw(7) << "Price" << ": RM" << fixed << setprecision(2) << price << endl;
}

void displayInfoAudience()
{
if (numAudience == 0)
{
cout << "No audience!" << endl;
}
else
{
cout << setw(18) << "Number of Audience" << ": " << numAudience << endl
<< setw(18) << "Number of Adults" << ": " << numAdults << endl
<< setw(18) << "Number of Kids" << ": " << numKids << endl;

cout << endl
<< "No" << setw(20) << "Name" << setw(8) << "Age"
<< setw(20) << "Parent Name" << setw(8) << "Seat No." << "Ticket (RM)" << endl;

double total = 0;

for (int i=0; i<numAudience; ++i)
{
cout << setw(4) << i+1;
audienceList[i]->displayDetails();
price = price * (audienceList[i]->calcDisc());
cout << fixed << setprecision(2) << price << endl;
total += price;
}

cout << "\nTotal ticket price = RM" << fixed << setprecision(2) << total << endl;
}
}
};

int displayMenu()
{
int choice;
cout << "========== Menu ==========\n"
<< "[1] Add Movie" << endl
<< "[2] Add Audience" << endl
<< "[3] Display Movies" << endl
<< "[4] Display Audiences" << endl
<< "[5] Exit" << endl
<< "==========================\n\n"
<< "Select task: ";
cin >> choice;

return choice;
}


int main()
{
int choice;
Movie movie[10];
int count = 0;

choice = displayMenu();

while(choice >=1 && choice <= 5)
{
switch(choice)
{
case 1:
{
for(int i=count; i<=count; ++i)
{
cout << "\n<<< Add Movie >>>" << endl;
movie[i].readInput();
}
count++;
break;
}

case 2:
{

char choice2 = 'y';
int choice3;
cout << "\n<<< Add Audience >>>" << endl;
cout << endl;
cout << "Movie List" << endl;

for(int i=0; i<count; ++i)
{
for(int j=0; j<count; ++j)
{
cout << j+1 << ") " << movie[j].getTitle();
movie[j].getDateTime();
}

cout << "Select movie: ";
cin >> choice3;

cout << endl
<< "--- Enter Audience Info ---" << endl;

string name, pname;
int age = 0, seatNo = 0;

while (choice2 == 'y')
{
cout << left;
cout << setw(7) << "Name" << ": ";
cin.ignore();
getline(cin, name);
cout << setw(7) << "Age" << ": ";
cin >> age;
if(age > 12)
{
cout << setw(7) << "Seat No" << ": ";
cin >> seatNo;

if(movie[choice3+1].getSeat(seatNo) == false)
{
cout << "Seat unavailable, choose others!" << endl << endl;
cin >> seatNo;
}

movie[i].addAudience(new Adults(name, age, seatNo));
}
else
{
cout << "Parent Name: ";
cin >> pname;

movie[i].addAudience(new Kids (name, age, seatNo, pname));
}

cout << endl
<< "Press 'Y' to continue >> ";
cin >> choice2;
// cout << endl
// << "--- Enter Audience Info ---" << endl;
}
}
break;
}

case 3:
{
if (count == 0)
{
cout << "Sorry!! No movie data to display..." << endl;
}
else
{
cout << "\n<<< Movie Info >>>" << endl;
cout << endl
<< "Number of Movies: " << count << endl;

for(int i=0; i<count; ++i)
{
cout << endl
<< "Movie #" << i+1 << endl;
movie[i].displayInfoMovie();
}
}
break;
}

case 4:
{
if (count == 0)
{
cout << "Sorry!! No movie, please add movie first..." << endl;
}
else
{
cout << "\n<<< Movie(s) and Audience(s) Info >>>" << endl;
cout << endl
<< "Number of Movies: " << count << endl;

for(int i=0; i<count; ++i)
{
cout << endl
<< "Movie #" << i+1 << endl;
movie[i].displayInfoMovie();
cout << endl;
movie[i].displayInfoAudience();
}
}
break;
}

default:
{
cout << "Thank you! :)" << endl;
exit(0);
}
}
cout << endl;
choice = displayMenu();
}

return 0;
}

[saltyyyyy]

now I had faced the problem with the case 2, I wonder why after I press n, it still show the movielist?

[seeplus]

Use code tags when posting code so that its' readable!

[code]
... the code goes here
[/code]

[saltyyyyy]

thank you for your speedy reply! and I found another issue, the seat unavailable function does not show when the same value of seat is input by the user. and after I try all, the program end suddenly even I do not press option 5.

#include  <iostream>
#include <iomanip>
#include <string>
using namespace std;

class Audience{
	protected:
		string name;
		int age, seatNo;
	public:
		Audience(string name, int age, int seatNo)
		{
			this->name = name;
			this->age = age;
			this->seatNo=seatNo;
		}
		int getAge() const
		{
			return age;
		}
		virtual void displayDetails()
		{
			
		}
		virtual double calcDisc() = 0;
};

class Adults: public Audience{	//inheritance
	public:
		Adults(string name="", int age=0, int seatNo=0): Audience(name, age, seatNo)
		{}
		void displayDetails()
		{
			cout << setw(20) << name << setw(8) << age
				 << setw(20) << "-" << setw(8) << seatNo;
		}
		double calcDisc()
		{
			if (age >= 60)
				return 0.8;
			else
				return 1;
		}
};

class Kids: public Audience{	//inheritance
	private:
		string parentName;
	public:
		Kids(string name="", int age=0, int seatNo=0, string parentName=""):Audience(name, age, seatNo)
		{
			this->parentName = parentName;
		}
		void displayDetails()
		{
			cout << setw(20) << name << setw(8) << age
				 << setw(20) << parentName << setw(8) << seatNo;
		}
		double calcDisc()
		{
			double discount;
			
			if(age <= 2)
			{
				discount = 0;
			}
			else if(age <= 12)
			{
				discount = 0.8;
			}
			
			return discount;
		}
};

class Date{
	private:
		int day, month, year;
	public:
		void dispDate()
		{
			cout << setprecision(2) << day << "-" << setprecision(2) << month << "-" << setprecision(4) << year;
		}
		void readDate()
		{
			char dummy;
			cin >> day >> dummy >> month >> dummy >> year;
		}
};

class Time{
	private:
		int hour, minute;
	public:
		void dispTime()
		{
			string time;
			if (hour <= 11)
			{
				time = "am";
			}
			else
			{
				time = "pm";
			}
			
			cout << hour << ":" << minute << " " << time;
		}
		void readTime()
		{
			char dummy;
			cin >> hour >> dummy >> minute;
		}
};

class Movie{
	private:
		string title;
		bool seat[50];
		double price;
		int numAdults, numKids;
		int numAudience, hallNo;
		Audience* audienceList[20];	//aggregation with class audience
		Date d;
		Time t;
	public:
		Movie()
		{
			price = 0.0;
			numAdults = 0;
			numKids = 0;
			numAudience = 0;
		}
		
		string getTitle()
		{
			return title;
		}
		
		bool getSeat(int s)	
		{
			bool value;
			
			if(seat[s+1] == true)	//check whether array have value or not
			{
				value = false;
			}
			else
			{
				value = true;
			}
			return value;
		}
		
		void setSeat(int s)	
		{
			s = seat[s+1];
		}
		
		void addAudience(Audience* audience)	
		{
			audienceList[numAudience] = audience;
			
			if (audience->getAge() <= 12)
			{
				++numKids;
			}
			else
			{
				++numAdults;
			}
			
			++numAudience;
		}
		
		void getDateTime()
		{
			cout << "(" ;
			d.dispDate();
			cout << ", ";
			t.dispTime();
			cout << ")\n";
		}
		
		void readInput()
		{
			cout << "Title: ";
			cin.ignore();
			getline(cin, title);
			cout << "Hall: ";
			cin >> hallNo;
			cout << "Ticket price: RM";
			cin >> price;
			cout << "Date [dd-mm-yyyy]: ";
			d.readDate();
			cout << "Time [hour:min] using 24-hour format: ";
			t.readTime();
		}
		
		void displayInfoMovie()
		{
			cout << setw(7) << "Title" << ": " << title << endl;
			cout << setw(7) << "Hall" << ": " << hallNo << endl;
			cout << setw(7) << "Date" << ": ";
					d.dispDate();
			cout << endl;
			cout << setw(7) << "Time" << ": ";
					t.dispTime();
			cout << endl;
			cout << setw(7) << "Price" << ": RM" << fixed << setprecision(2) << price << endl; 
		}
		
		void displayInfoAudience()
		{
			if (numAudience == 0)
			{
				cout << "No audience!" << endl;
			}
			else
			{
				cout << setw(18) << "Number of Audience" << ": " << numAudience << endl
					 << setw(18) << "Number of Adults" << ": " << numAdults << endl
					 << setw(18) << "Number of Kids" << ": " << numKids << endl;
					 
				cout << endl 
					 << "No" << setw(20) << "Name" << setw(8) << "Age" 
					 << setw(20) << "Parent Name" << setw(8) << "Seat No." << "Ticket (RM)" << endl;					
				
				double total = 0;
				
				for (int i=0; i<numAudience; ++i)
				{
					cout << setw(4) << i+1;
					audienceList[i]->displayDetails();
					price = price * (audienceList[i]->calcDisc());
					cout << fixed << setprecision(2) << price << endl;
					total += price;
				}	 		
				
				cout << "\nTotal ticket price = RM" << fixed << setprecision(2) << total << endl;		
			}
		}
};

int displayMenu()
{
	int choice;
	cout << "========== Menu ==========\n" 
		 << "[1] Add Movie" << endl
		 << "[2] Add Audience" << endl
		 << "[3] Display Movies" << endl
		 << "[4] Display Audiences" << endl
		 << "[5] Exit" << endl
		 << "==========================\n\n" 
		 << "Select task: ";
	cin >> choice;

	return choice;
}
 

int main()
{
	int choice;
	Movie movie[10];	
	int count = 0;
	
	choice = displayMenu();
	
	while(choice >=1 && choice <= 5)
	{
		switch(choice)
		{
			case 1:
			{
				for(int i=count; i<=count; ++i)
				{
					cout << "\n<<< Add Movie >>>" << endl;
					movie[i].readInput();
				}
				count++;
				break;
			}
	
			case 2:
			{
	 			
				char choice2 = 'y';
				int choice3;
				cout << "\n<<< Add Audience >>>" << endl;
				cout << endl;
				cout << "Movie List" << endl;
				
				for(int i=0; i<count; ++i)
				{
					for(int j=0; j<count; ++j)
					{	
						cout << j+1 << ") " << movie[j].getTitle();
						movie[j].getDateTime();
					}
					
					cout << "\nSelect movie: ";
					cin >> choice3;
					
					cout << endl
						 << "--- Enter Audience Info ---" << endl;
					
					string name, pname;
					int age = 0, seatNo = 0;
					
					while (choice2 == 'y')
					{
						cout << left;
						cout << setw(7) << "Name" << ": ";
						cin.ignore();
						getline(cin, name);
						cout << setw(7) << "Age" << ": ";
						cin >> age;
						if(age > 12)
						{
							cout << setw(7) << "Seat No" << ": ";
							cin >> seatNo;
							
							if(movie[choice3+1].getSeat(seatNo) == false)
							{
								cout << "Seat unavailable, choose others!" << endl << endl;
								cin >> seatNo;
							}
							
							movie[i].addAudience(new Adults(name, age, seatNo));
						}
						else
						{
							cout << "Parent Name: ";
							cin >> pname;
							
							movie[i].addAudience(new Kids (name, age, seatNo, pname));
						}
						
						cout << endl
							 << "Press 'Y' to continue >> ";
						cin >> choice2;
						cout << endl;
					}	
				}
				break;
			}
			
			case 3:
			{
				if (count == 0)
				{
					cout << "Sorry!! No movie data to display..." << endl;
				}
				else
				{
					cout << "\n<<< Movie Info >>>" << endl;
					cout << endl 
						 << "Number of Movies: " << count << endl;
					
					for(int i=0; i<count; ++i)
					{
						cout << endl
							 << "Movie #" << i+1 << endl;
						movie[i].displayInfoMovie();
					}
				}
				break;
			}
			
			case 4:
			{
				if (count == 0)
				{
					cout << "Sorry!! No movie, please add movie first..." << endl;
				}
				else
				{
					cout << "\n<<< Movie(s) and Audience(s) Info >>>" << endl;
					cout << endl 
						 << "Number of Movies: " << count << endl;
					
					for(int i=0; i<count; ++i)
					{
						cout << endl
							 << "Movie #" << i+1 << endl;
						movie[i].displayInfoMovie();
						cout << endl;
						movie[i].displayInfoAudience();
					}
				}
				break;
			}
			
			default:
			{
				cout << "Thank you! :)" << endl;
				exit(0);
			}
		}
		cout << endl;
		choice = displayMenu();
	}
	
	return 0;
}

[seeplus]

Movie class now needs a destructor to free the allocated memory. See mine above.

Also see the changes I made to the classes....

[saltyyyyy]

yes, I am using dev cpp, and I also add on the destructor, but it also terminates.
and for the seat also, I don't know why it cant function

[seeplus]

Now is the time to become good friends with the debugger. Using the debugger, trace through the code to make sure it's behaving as expected and that the variables contain the expected values. When you find that which isn't as expected - then you're found a problem.

[saltyyyyy]

solved! thank you so much