C++ Source Code: C++ Programming Concepts

ballonpoking(A GAME IN C++)

This game will help all new C Language Programmers in understanding the concepts of graphics and object oriented programming in […]

C Programming, Game, Source Code

C++ Source Code: C++ Programming Concepts

Information Hiding

Example of a program with a little information?hiding contained in it.

/*******************************************************
*     MYCPLUS Sample Code - https://www.mycplus.com     *
*                                                     *
*   This code is made available as a service to our   *
*      visitors and is provided strictly for the      *
*               purpose of illustration.              *
*                                                     *
* Please direct all inquiries to saqib at mycplus.com *
*******************************************************/

#include <iostream.h>

class one_datum {
   int data_store;
public:
   void set(int in_value);
   int get_value(void);
};


void one_datum::set(int in_value)
{
   data_store = in_value;
}


int one_datum::get_value(void)
{
   return data_store;
}


main()
{
one_datum dog1, dog2, dog3;
int piggy;


   dog1.set(12);
   dog2.set(17);
   dog3.set(-13);
   piggy = 123;


// dog1.data_store = 115;      This is illegal in C++
// dog2.data_store = 211;      This is illegal in C++


   cout << "The value of dog1 is " << dog1.get_value() << "\n";
   cout << "The value of dog2 is " << dog2.get_value() << "\n";
   cout << "The value of dog3 is " << dog3.get_value() << "\n";
   cout << "The value of piggy is " << piggy << "\n";
}






// Result of execution
//
// The value of dog1 is 12
// The value of dog2 is 17
// The value of dog3 is -13
// The value of piggy is 123

/*******************************************************

* MYCPLUS Sample Code - https://www.mycplus.com *

* *

* This code is made available as a service to our *

* visitors and is provided strictly for the *

* purpose of illustration. *

* *

* Please direct all inquiries to saqib at mycplus.com *

*******************************************************/

#include <iostream.h>

class one_datum {

int data_store;

public:

void set(int in_value);

int get_value(void);

};

void one_datum::set(int in_value)

{

data_store = in_value;

}

int one_datum::get_value(void)

{

return data_store;

}

main()

{

one_datum dog1, dog2, dog3;

int piggy;

dog1.set(12);

dog2.set(17);

dog3.set(-13);

piggy = 123;

// dog1.data_store = 115; This is illegal in C++

// dog2.data_store = 211; This is illegal in C++

cout << "The value of dog1 is " << dog1.get_value() << "\n";

cout << "The value of dog2 is " << dog2.get_value() << "\n";

cout << "The value of dog3 is " << dog3.get_value() << "\n";

cout << "The value of piggy is " << piggy << "\n";

}

// Result of execution

// The value of dog1 is 12

// The value of dog2 is 17

// The value of dog3 is -13

// The value of piggy is 123

C++ Programming, Polymorphism, Source Code

C++ Source Code: C++ Programming Concepts

SWAT GAME

/*******************************************************
*     MYCPLUS Sample Code - https://www.mycplus.com     *
*                                                     *
*   This code is made available as a service to our   *
*      visitors and is provided strictly for the      *
*               purpose of illustration.              *
*                                                     *
* Please direct all inquiries to saqib at mycplus.com *
*******************************************************/

#include <graphics.h>
#include <conio.h>
#include <stdlib.h>
#include <dos.h>

class swat{
	public:
	void draw_swat( int x ){
		setcolor( LIGHTCYAN );
		setlinestyle( SOLID_LINE,0,3 );
		line( x,470,x,275);
		setfillstyle( XHATCH_FILL, LIGHTCYAN );
		rectangle( x-80,50,x+80,275);
		floodfill( x,200, LIGHTCYAN );
	}
} swats;

int final_x, final_y;

class fly{
	private:
	int move_x, move_y, current_x, current_y;

	public:
	void draw_fly( int& );

	void show_fly(){
		setcolor( WHITE );
		setfillstyle( SOLID_FILL, getcolor() );
		circle( final_x, final_y, 4 );
		floodfill( final_x, final_y, getcolor() );
	}
} fly;


void fly :: draw_fly( int &time )
{

	randomize();

	current_x = random(600);
	current_y = random(275);

	for( int i=0; i<10; i++ ){
		setcolor( WHITE );
		setfillstyle( SOLID_FILL, getcolor() );
		circle( current_x, current_y, 4 );
		floodfill( current_x, current_y, getcolor() );
		sound(200);

		delay( time );
		setcolor( BLACK );
		setfillstyle( SOLID_FILL, getcolor() );
		circle( current_x, current_y, 4 );
		floodfill( current_x, current_y, getcolor() );
		nosound();

		final_x = current_x;
		final_y = current_y;

		move_x = random(300);
		move_y = random(175);

		if ( current_x + move_x > 600 )
			current_x -= 1.25 * move_x;
		else current_x += move_x;
		if ( current_x <= 0 )
			current_x += 0.75 * move_x;

		if ( current_y + move_y > 275 )
			current_y -= move_y;

		else if( current_y + move_y < 50 )
			current_y += 2 * move_y;
		else current_y += move_y;
	}
}


void main()
{
	int pos;
	int swat_number;
	int time = 700;

	enum state{ WIN,LOSE };
	state user;

	int driver=DETECT;
	int mode=DETECT;
	initgraph(&driver,&mode,"\\borlandc\\bgi <file://\\borlandc\\bgi>");
	highvideo();

	do{
		user = LOSE;
		pos = 120;

		cleardevice();
		fly.draw_fly( time );
		time-= 50;
		for( int i=0; i<3; i++ ){

			swats.draw_swat( pos );
			pos+=200;
		}

		settextstyle(DEFAULT_FONT,HORIZ_DIR,2);
		outtextxy( 10,5, "Enter swat number?" );
		swat_number = getch();

		cleardevice();

		switch ( swat_number ){
			case '1' : if( ( final_x < 220 && final_x > 0 ))
			user = WIN;
			break;

			case '2' : if( ( final_x < 420 && final_x > 220 ) )
			user = WIN;
			break;

			case '3' : if( ( final_x < 620 && final_x > 420 ) )
			user = WIN;
			break;
		}

		cleardevice();
		if( time <= 70 && user == WIN ){
			settextstyle(TRIPLEX_FONT,HORIZ_DIR,11);
			for( int i=1; i<15; i++ ){
				setcolor(i);
				outtextxy( 180,10,"FLY" );
				outtextxy( 30,150,"SWATTING" );
				outtextxy( 10,300,"CHAMPION" );
				delay(1000);
			}
			exit( EXIT_SUCCESS );
		}

		fly.show_fly();

		settextstyle(TRIPLEX_FONT,HORIZ_DIR,9);

		if( user == WIN ){
			setcolor(LIGHTGREEN);
			outtextxy( 40,350,"YOU WON !!!!" );
		}
		else{
			setcolor(LIGHTRED);
			outtextxy( 40,350,"YOU LOSE !!!!" );
		}

		getch();
	}while( user == WIN );
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

/*******************************************************

* MYCPLUS Sample Code - https://www.mycplus.com *

* *

* This code is made available as a service to our *

* visitors and is provided strictly for the *

* purpose of illustration. *

* *

* Please direct all inquiries to saqib at mycplus.com *

*******************************************************/

#include <graphics.h>

#include <conio.h>

#include <stdlib.h>

#include <dos.h>

class swat{

public:

void draw_swat( int x ){

setcolor( LIGHTCYAN );

setlinestyle( SOLID_LINE,0,3 );

line( x,470,x,275);

setfillstyle( XHATCH_FILL, LIGHTCYAN );

rectangle( x-80,50,x+80,275);

floodfill( x,200, LIGHTCYAN );

}

} swats;

int final_x, final_y;

class fly{

private:

int move_x, move_y, current_x, current_y;

public:

void draw_fly( int& );

void show_fly(){

setcolor( WHITE );

setfillstyle( SOLID_FILL, getcolor() );

circle( final_x, final_y, 4 );

floodfill( final_x, final_y, getcolor() );

}

} fly;

void fly :: draw_fly( int &time )

{

randomize();

current_x = random(600);

current_y = random(275);

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

setcolor( WHITE );

setfillstyle( SOLID_FILL, getcolor() );

circle( current_x, current_y, 4 );

floodfill( current_x, current_y, getcolor() );

sound(200);

delay( time );

setcolor( BLACK );

setfillstyle( SOLID_FILL, getcolor() );

circle( current_x, current_y, 4 );

floodfill( current_x, current_y, getcolor() );

nosound();

final_x = current_x;

final_y = current_y;

move_x = random(300);

move_y = random(175);

if ( current_x + move_x > 600 )

current_x -= 1.25 * move_x;

else current_x += move_x;

if ( current_x <= 0 )

current_x += 0.75 * move_x;

if ( current_y + move_y > 275 )

current_y -= move_y;

else if( current_y + move_y < 50 )

current_y += 2 * move_y;

else current_y += move_y;

}

void main()

{

int pos;

int swat_number;

int time = 700;

enum state{ WIN,LOSE };

state user;

int driver=DETECT;

int mode=DETECT;

initgraph(&driver,&mode,"\\borlandc\\bgi <file://\\borlandc\\bgi>");

highvideo();

do{

user = LOSE;

pos = 120;

cleardevice();

fly.draw_fly( time );

time-= 50;

for( int i=0; i<3; i++ ){

swats.draw_swat( pos );

pos+=200;

}

settextstyle(DEFAULT_FONT,HORIZ_DIR,2);

outtextxy( 10,5, "Enter swat number?" );

swat_number = getch();

cleardevice();

switch ( swat_number ){

case '1' : if( ( final_x < 220 && final_x > 0 ))

user = WIN;

break;

case '2' : if( ( final_x < 420 && final_x > 220 ) )

user = WIN;

break;

case '3' : if( ( final_x < 620 && final_x > 420 ) )

user = WIN;

break;

}

cleardevice();

if( time <= 70 && user == WIN ){

settextstyle(TRIPLEX_FONT,HORIZ_DIR,11);

for( int i=1; i<15; i++ ){

setcolor(i);

outtextxy( 180,10,"FLY" );

outtextxy( 30,150,"SWATTING" );

outtextxy( 10,300,"CHAMPION" );

delay(1000);

}

exit( EXIT_SUCCESS );

}

fly.show_fly();

settextstyle(TRIPLEX_FONT,HORIZ_DIR,9);

if( user == WIN ){

setcolor(LIGHTGREEN);

outtextxy( 40,350,"YOU WON !!!!" );

}

else{

setcolor(LIGHTRED);

outtextxy( 40,350,"YOU LOSE !!!!" );

}

getch();

}while( user == WIN );

}

C++ Programming, Game, Source Code

C++ Source Code: C++ Programming Concepts

Non-Trivial Class in C++

This C++ date class is intended to illustrate how to write a non- trivial class in C++. Even though this

C++ Programming, Classes, Source Code

C++ Source Code: C++ Programming Concepts

OOP: Object Oriented Programming: Source Code

First hint of object oriented programming using C++.

#include <iostream.h>
#include <string.h>


main()
{
int index;
float distance;
char letter;
char name[25];


   index = -23;
   distance = 12.345;
   letter = 'X';
   strcpy(name,"John Doe");


   cout << "The value of index is "    << index    << "\n";
   cout << "The value of distance is " << distance << "\n";
   cout << "The value of letter is "   << letter   << "\n";
   cout << "The value of name is "     << name     << "\n";


   index = 31;
   cout << "The decimal value of index is " << dec << index << "\n";
   cout << "The octal value of index is " << oct << index << "\n";
   cout << "The hex value of index is " << hex << index << "\n";
   cout << "The character letter is " << (char)letter << "\n";


   cout << "Input a decimal value --> ";
   cin  >> index;
   cout << "The hex value of the input is " << index << "\n";
}

#include <iostream.h>

#include <string.h>

main()

{

int index;

float distance;

char letter;

char name[25];

index = -23;

distance = 12.345;

letter = 'X';

strcpy(name,"John Doe");

cout << "The value of index is " << index << "\n";

cout << "The value of distance is " << distance << "\n";

cout << "The value of letter is " << letter << "\n";

cout << "The value of name is " << name << "\n";

index = 31;

cout << "The decimal value of index is " << dec << index << "\n";

cout << "The octal value of index is " << oct << index << "\n";

cout << "The hex value of index is " << hex << index << "\n";

cout << "The character letter is " << (char)letter << "\n";

cout << "Input a decimal value --> ";

cin >> index;

cout << "The hex value of the input is " << index << "\n";

}

Output of the C++ Program: Result of execution The value of

C++ Programming, OOP, Source Code

C++ Source Code: C++ Programming Concepts

Constructors and Destructors – C++ Source Code

The following C++ program demonstrates the concept of constructors and destructors in C++.

C++ Programming, Constructors, Destructors, Source Code

C++ Source Code: C++ Programming Concepts

Simple class program

/*******************************************************
*     MYCPLUS Sample Code - https://www.mycplus.com     *
*                                                     *
*   This code is made available as a service to our   *
*      visitors and is provided strictly for the      *
*               purpose of illustration.              *
*                                                     *
* Please direct all inquiries to saqib at mycplus.com *
*******************************************************/


#include

class vehicle {
protected:
int wheels;
float weight;
public:
void initialize(int in_wheels, float in_weight);
int get_wheels(void) {return wheels;}
float get_weight(void) {return weight;}
float wheel_loading(void) {return weight/wheels;}
};




class car : public vehicle {
int passenger_load;
public:
void initialize(int in_wheels, float in_weight, int people = 4);
int passengers(void) {return passenger_load;}
};




class truck : public vehicle {
int passenger_load;
float payload;
public:
void init_truck(int how_many = 2, float max_load = 24000.0);
float efficiency(void);
int passengers(void) {return passenger_load;}
};




main()
{
vehicle unicycle;

unicycle.initialize(1, 12.5);
cout << "The unicycle has " <<
unicycle.get_wheels() << " wheel.\n";
cout << "The unicycle's wheel loading is " <<
unicycle.wheel_loading() << " pounds on the single tire.\n";
cout << "The unicycle weighs " <<
unicycle.get_weight() << " pounds.\n\n";

car sedan;

sedan.initialize(4, 3500.0, 5);
cout << "The sedan carries " << sedan.passengers() <<
" passengers.\n";
cout << "The sedan weighs " << sedan.get_weight() << " pounds.\n";
cout << "The sedan's wheel loading is " <<
sedan.wheel_loading() << " pounds per tire.\n\n";

truck semi;

semi.initialize(18, 12500.0);
semi.init_truck(1, 33675.0);
cout << "The semi weighs " << semi.get_weight() << " pounds.\n";
cout << "The semi's efficiency is " <<
100.0 * semi.efficiency() << " percent.\n";
}




// initialize to any data desired
void
vehicle::initialize(int in_wheels, float in_weight)
{
wheels = in_wheels;
weight = in_weight;
}



void
car::initialize(int in_wheels, float in_weight, int people)
{
passenger_load = people;
wheels = in_wheels;
weight = in_weight;
}




void
truck::init_truck(int how_many, float max_load)
{
passenger_load = how_many;
payload = max_load;
}



float
truck::efficiency(void)
{
return payload / (payload + weight);
}




// Result of execution
//
// The unicycle has 1 wheel.
// The unicycle's wheel loading is 12.5 pounds on the single tire.
// The unicycle weighs 12.5 pounds.
//
// The sedan carries 5 passengers.
// The sedan weighs 3500 pounds.
// The sedan's wheel loading is 875 pounds per tire.
//
// The semi weighs 12500 pounds.
// The semi's efficiency is 72.929072 percent.

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

/*******************************************************

* MYCPLUS Sample Code - https://www.mycplus.com *

* *

* This code is made available as a service to our *

* visitors and is provided strictly for the *

* purpose of illustration. *

* *

* Please direct all inquiries to saqib at mycplus.com *

*******************************************************/

#include

class vehicle {

protected:

int wheels;

float weight;

public:

void initialize(int in_wheels, float in_weight);

int get_wheels(void) {return wheels;}

float get_weight(void) {return weight;}

float wheel_loading(void) {return weight/wheels;}

};

class car : public vehicle {

int passenger_load;

public:

void initialize(int in_wheels, float in_weight, int people = 4);

int passengers(void) {return passenger_load;}

};

class truck : public vehicle {

int passenger_load;

float payload;

public:

void init_truck(int how_many = 2, float max_load = 24000.0);

float efficiency(void);

int passengers(void) {return passenger_load;}

};

main()

{

vehicle unicycle;

unicycle.initialize(1, 12.5);

cout << "The unicycle has " <<

unicycle.get_wheels() << " wheel.\n";

cout << "The unicycle's wheel loading is " <<

unicycle.wheel_loading() << " pounds on the single tire.\n";

cout << "The unicycle weighs " <<

unicycle.get_weight() << " pounds.\n\n";

car sedan;

sedan.initialize(4, 3500.0, 5);

cout << "The sedan carries " << sedan.passengers() <<

" passengers.\n";

cout << "The sedan weighs " << sedan.get_weight() << " pounds.\n";

cout << "The sedan's wheel loading is " <<

sedan.wheel_loading() << " pounds per tire.\n\n";

truck semi;

semi.initialize(18, 12500.0);

semi.init_truck(1, 33675.0);

cout << "The semi weighs " << semi.get_weight() << " pounds.\n";

cout << "The semi's efficiency is " <<

100.0 * semi.efficiency() << " percent.\n";

}

// initialize to any data desired

void

vehicle::initialize(int in_wheels, float in_weight)

{

wheels = in_wheels;

weight = in_weight;

}

void

car::initialize(int in_wheels, float in_weight, int people)

{

passenger_load = people;

wheels = in_wheels;

weight = in_weight;

}

void

truck::init_truck(int how_many, float max_load)

{

passenger_load = how_many;

payload = max_load;

}

float

truck::efficiency(void)

{

return payload / (payload + weight);

}

// Result of execution

// The unicycle has 1 wheel.

// The unicycle's wheel loading is 12.5 pounds on the single tire.

// The unicycle weighs 12.5 pounds.

// The sedan carries 5 passengers.

// The sedan weighs 3500 pounds.

// The sedan's wheel loading is 875 pounds per tire.

// The semi weighs 12500 pounds.

// The semi's efficiency is 72.929072 percent.

C++ Programming, Classes, Source Code

C++ Source Code: C++ Programming Concepts

Multiple inheritance

In order to keep the program as simple as possible, all of the member methods are defined as inline functions.?

C++ Programming, Inheritance, Source Code

C++ Source Code: C++ Programming Concepts

Derived Classes

program, the objects are instantiated from an?inherited class and the intent of this program? is to illustrate that there is

C++ Programming, Classes, Source Code

C++ Source Code: C++ Programming Concepts

Demonstration of inheritance in C++

Demonstration of inheritance in c++. This example contains the following files. VEHICLE.H VEHICLE.CPP ALLVEHIC.CPP CAR.H CAR.CPP TRANSPORT.CPP TRUCK.H TRUCK.CPP Vehicle.h

C++ Programming, Inheritance, Source Code

C++ Source Code: C++ Programming Concepts

Miltiple Inheritance

The basic concept of multiple inheritance (MI) sounds simple enough: you create a new type by inheriting from more than

C++ Programming, Inheritance, Source Code

C++ Source Code: C++ Programming Concepts

Car Race Game

This is a simple C++ program to make a car race game. It uses object oriented approach to generate different objects in the game such as using Car, Obstacle and Timer classes.

C++ Programming, Game, Source Code