Articles on C++ Programming - MYCPLUS

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++ 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.

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

* 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

C++ Source Code: Exception Handling

Error recovery is a fundamental concern for every program you write, and it’s especially important in C++, in which one

C++ Programming, Exception, 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

Graphical Calculator and Dairy

This is a Graphical calculator and graphical dairy which uses files to store the diary information. [code=’c’]/******************************************************* * MYCPLUS Sample

C++ Programming, Calculator, Source Code

C++ Source Code: C++ Programming Concepts

Change IP configuration using C++

This sample illustrates how to programmatically change an IP address for a specific network adapter on your machine. This program also demonstrates how to retrieve existing network adapter IP configuration information using Win32 APIs.

C++ Programming, Source Code