C++ Class (not school :o)

[JasonLpz]

Hi im back lol thank you all again for all the help. I know how to make and use a class but i was reading this book and got confused allitle. I think it said i can put a class in a header (h) file. Can i ? And i wanted to know if i have a cpp file with some code but not the main code can i still cal it like it was on the main file? or do i have to define it somehow or something

so overview:

1. Can i put a class in a .h
2. How do i use a seperate cpp file that has fuctions and classes in it.

[The Hobo]

Originally posted by JasonLpz
1. Can i put a class in a .h

Yes.

Originally posted by JasonLpz
2. How do i use a seperate cpp file that has fuctions and classes in it.

Why not use a header file? That's what they're for.

[JasonLpz]

oh i c ok thanks a bunch

[made_of_asp]

Usually the functions and classes themselves a are placed within a .cpp file, header files are used for class and function prototypes.

[JasonLpz]

prototypes?

[made_of_asp]

prototype example:

(hi.h)

void Hi(); //prototype

(hi.c)

void Hi()
{
 printf("Hi\n");
}

include hi.h and use hi() function anywhere in your program.

[JasonLpz]

oh i get it now thanks alot

[twanvl]

And when using classes it looks like this:

car.h

// This is to ensure that the class onyl gets declared once
#ifndef INCLUDED_MYPROJECT_CAR_H
#define INCLUDED_MYPROJECT_CAR_H

class car
{
    bool driving_;
public:
    void start();
    void stop();
    void crash();
};

#endif

car.cpp

#include "car.h"
#include <iostream>

void car::start()
{
    driving_ = true;
}

void car::stop()
{
    driving_ = false;
}

void car::crash()
{
    if (driving_) {
        std::cout << "CRASH!";
    } else {
        std::cout << "standing still, can't crash";
    }
}