// Example C++ code for OPT

// From: http://www.cprogramming.com/tutorial/lesson12.html

#include <iostream>

using namespace std;

class Computer // Standard way of defining the class

{

public:

// This means that all of the functions below this(and any variables)

// are accessible to the rest of the program.

// NOTE: That is a colon, NOT a semicolon...

Computer();

// Constructor

~Computer();

// Destructor

void setspeed ( int p );

int readspeed();

protected:

// This means that all the variables under this, until a new type of

// restriction is placed, will only be accessible to other functions in the

// class. NOTE: That is a colon, NOT a semicolon...

int processorspeed;

};

// Do Not forget the trailing semi-colon

Computer::Computer()

{

//Constructors can accept arguments, but this one does not

processorspeed = 0;

}

Computer::~Computer()

{

//Destructors do not accept arguments

}

void Computer::setspeed ( int p )

{

// To define a function outside put the name of the class

// after the return type and then two colons, and then the name

// of the function.

processorspeed = p;

}

int Computer::readspeed()

{

// The two colons simply tell the compiler that the function is part

// of the class

return processorspeed;

}

int main()

{

Computer compute;

// To create an 'instance' of the class, simply treat it like you would

// a structure. (An instance is simply when you create an actual object

// from the class, as opposed to having the definition of the class)

compute.setspeed ( 100 );

// To call functions in the class, you put the name of the instance,

// a period, and then the function name.

cout<< compute.readspeed();

// See above note.

}