C++ Class (not school :o)

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.

Quote:

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

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Yes.

Quote:

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

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

oh i c ok thanks a bunch

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

prototypes?

prototype example:

(hi.h)

Code:

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void Hi(); //prototype

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(hi.c)

Code:

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void Hi()
{
 printf("Hi\n");
}

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

oh i get it now thanks alot

And when using classes it looks like this:

car.h

Code:

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// 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

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car.cpp

Code:

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#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";
    }
}

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