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[PoeFacedKilla]

PoeFacedKilla

[C++] Help!

Ok, I have been reading a c++ book lately, and I have definitely got the hang of it.  But the only problem I am having is with making a program more than one file.  So can somebody help me?

main.cpp

Code: [Select]

#include <allegro.h>
#include "header.h"

int main( int argc, char *argv[] )
{
 
    allegro_init();
    install_keyboard();
   
    set_window_title( "SPACEWAR" );
    set_color_depth( 24 );
    set_gfx_mode( GFX_AUTODETECT, 680, 420, 0, 0 );
   
    if( ! ( KEY_ESC ) )
    {
   
        draw_sprite( ship1, 0, 0 );

       
    }
   
    readkey();
   
    return 0;
   
}

END_OF_MAIN()

header.h

Code: [Select]

    BITMAP *ship1 = NULL
    ship1 = load_bitmap( "ship1.png", NULL );


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[TheDarkJay]

TheDarkJay

Re: [C++] Help!

ship1 = load_bitmap( "ship1.png", NULL );
Take this line out of the header and put it into your main function.

[PoeFacedKilla]

PoeFacedKilla

Re: [C++] Help!

now I get an error with the

Code: [Select]

int main( int argc, char *argv[] )


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[TheDarkJay]

TheDarkJay

Re: [C++] Help!

What is the error?

[PoeFacedKilla]

PoeFacedKilla

Re: [C++] Help!

expected , or ; before int

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[TheDarkJay]

TheDarkJay

Re: [C++] Help!

BITMAP *ship1 = NULL

should be

BITMAP *ship1 = NULL;

missed that first time I was looking at it.

[PoeFacedKilla]

PoeFacedKilla

Re: [C++] Help!

yeah i did too..

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[Infinitus]

Infinitus

Re: [C++] Help!

BITMAP *ship1 = NULL;

Should actually be;

extern BITMAP *ship1;

and should be declared in header.h and initializied in main.cpp.

Header files are only for declarations, they should never include actual code.

[Antidote]

Antidote

Re: [C++] Help!

unless the code is ridiculously small, but even then it should be avoided however if you decide to go the OOP way then

Code: [Select]

public:
    MyClass() {};
    ~MyClass() {};
is common and acceptable. ctors and dtors don't always DO anything and don't need code however you still need to declare them and this allows you to do so with out polluting your code files.

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[Cassyblanca]

Cassyblanca

Re: [C++] Help!

Try this:

header.h

Code: [Select]

// Header.h

#ifndef _HEADER_H_
#define _HEADER_H_

// Headers
#include <allegro.h>

// External Variable Declarations
extern BITMAP* ship1;

// Function Prototypes
int main(int, char**);

#endif
Main.cpp

Code: [Select]

// Main.cpp

// Headers
#include "Header.h"

// Variable Definitions (defining ship1 in Header.h allows other source files to access the (global) variable after by including Header.h in them.
BITMAP *ship1 = NULL;

int main(int argc, char **argv)
{
      // Initialize Allegro
      allegro_init(); // Allegro system Init
      install_keyboard(); // Allegro Keyboard Init

      // Configure the Allegro window
      set_window_title("SPACEWAR"); // Window Title
      set_color_depth(24); // Color Depth
      set_gfx_mode(GFX_AUTODETECT, // Graphics Mode (Auto-Detect)
            680, 420,       // Screen Size
            0, 0);            // Virtual Screen Size

      // Load the Ship bitmap
      ship1 = load_bitmap("ship1.png", NULL);

      // If Escape wasn't pressed, draw the sprite
      if(!(KEY_ESC))
            draw_sprite(ship1, 0, 0);

      // Wait for a key press (since we're foolishly not using a game loop)
      readkey();

      // Destroy the ship
      destroy_bitmap(ship1);

      return 0;
}

There's such a double standard about religion in the modern world. Catholics can gather, wear white robes, and say "In nomine Patris, et Filii, et Spiritus Sancti" and be considered normal.

But if my friends and I gather, wear black robes, and say  "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn", we're considered cultists.

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[Antidote]

Antidote

Re: [C++] Help!

      // Wait for a key press (since we're foolishly not using a game loop)

...You know i just noticed that <.<

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