Examples of basic C++ Header and class files.

Example of basic Header and class files

1 - Example of a basic Header File

see: https://github.com/plisken1/CPP_HeaderExample

Here we have two files;

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CPP_HeaderExample.cpp

#include <iostream>
#include "Utilities.h"
using namespace std;


int main()
{
string name = getInput("What is your name?");
print( "Your name is "+name,true);
return 0;
}

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And

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Utilities.h

#include <iostream>
using namespace std;

string getInput(string text, bool newLine=false)
{
string answer;
if (newLine)
{
cout << text<<endl;
}
else
{
cout << text;
}
cin >> answer;
return answer;
}
void print(string text, bool newLine=false)
{
if (newLine)
{
cout << text<< endl;
}
else
{
cout << text;
}
}

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What we have here is the test.cpp which is including or importing a Header file, Utilities.h which resides in the same directory. The header file contains two functions, getInput and print and these are used in the text.cpp file.

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2 - Example of a basic Class file (single file)

See https://github.com/plisken1/CPP_ClassExample 

In this first example below, the class is defined in  the same file;
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#include <iostream>

using namespace std;

class MyClass

{

private: // Not actually required.

    int privateInt;

public:

    int myNum; // Class variable

    string myString; // Class variable

    int getPrivateInt() // Public GETTER method.

    {

    return privateInt;

    }

    void setPrivateInt(int anInt) // Public SETTER method.

    {

    privateInt=anInt;

    }

    int doubleMe(int anInt)

    {

    return anInt*2;

    }

};

// Main part of program.

int main()

{

MyClass o; // Create object of MyClass

  o.myNum = 15; // Assign variable to object.

  o.myString = "Some text"; // Assign variable to object.

  o.setPrivateInt(5);

cout << o.myNum << endl;

cout << o.myString << endl;

cout << o.getPrivateInt() << endl;

cout << o.doubleMe(50) << endl;

return 0;

}

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3 - Example of a basic Class file (separate file)

In the second example below, there are 3 files required, the cpp file and 2 files associated with the class, a cpp and a header file.

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MyOtherClass.cpp - The Class file file.

#include "MyOtherClass.h"

#include<iostream>

std::string myString;

std::string a;

MyOtherClass::MyOtherClass()

{

// TODO Auto-generated constructor stub

}

std::string MyOtherClass::getString()

{

return myString;

}

void MyOtherClass::setString(std::string aStr)

{

myString=aStr;

}

MyOtherClass::~MyOtherClass()

{

// TODO Auto-generated destructor stub

}

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MyOtherClass.h - The Header file

#ifndef MYOTHERCLASS_H_

#define MYOTHERCLASS_H_

#include<iostream>

class MyOtherClass

{

public:

MyOtherClass();

std::string getString(); // Added

void setString(std::string); // Added

std::string a; // Added

virtual ~MyOtherClass();

};

// TODO Add GETTER and SETTER methods

#endif /* MYOTHERCLASS_H_ */

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CPP_ClassExample.cpp - The main file.

#include <iostream>

#include "MyOtherClass.h"

using namespace std;

// Main part of program.

int main()

{

MyOtherClass oc; // Create new object of MyOtherClass

  // MyOtherClass

  oc.a="good day";         // Assign variable to MyOtherClass object.

  oc.setString("ok then"); // Call SETTER Method.

// MyOtherClass

cout << oc.a << endl;

cout << oc.getString() << endl; // MyOtherClass GETTER method.

return 0;

}

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