Re: cannot convert 'SDL_DisplayMode' to 'SDL_DisplayMode*

I made the exact changes; still getting errors:



.\src\gobot.cpp:15:45: error: 'dm' has not been declared 

int gobot( int * horizontal, int* vertical, dm )

                                             ^

..\src\gobot.cpp: In function 'int gobot(int*, int*, int)':

..\src\gobot.cpp:18:18: error: 'dm' was not declared in this scope

   * horizontal = dm->w;





--

  Gray Family

  [email protected]







On Tue, Feb 7, 2017, at 09:11 PM, Brian Puthuff wrote:

> Your .H function declaration (prototype) for gobot and your .CPP
> function need to have the same arguments and return types.
> If your goal is to pass horizontal and vertical and dm into the
> function, and then store the display mode's width and height data into
> horizontal and vertical respectively, then you need to have the
> function take in pointers to horizontal and vertical. Then in your
> function definition, deference your pointers and store the values
> obtained by dm. Hopefully that makes sense.
> 

> 

> Code:
> 
> 

> int horizontal = 0;

> int vertical = 0;

> SDL_DisplayMode dm;

> cout<<"Gobot call:";

> gobot(&horizontal, &vertical, &dm);

> 

> 

> In your .CPP Definition:

> 

> int gobot( int* horizontal, int* vertical, SDL_DisplayMode* dm )

>    {

>       //SDL_GetDesktopDisplayMode(0, &dm);

>       *horizontal = dm->w;

>       *vertical = dm->h;

>       return 0;

>    }

> In your .H Declaration

> int gobot( int* horizontal, int* vertical, SDL_DisplayMode* dm );

> 

> On Tue, Feb 7, 2017 at 5:20 PM, speartip
> <[email protected]> wrote:
>> __

>> Hi,

>> 

>>  I am struggling with some pretty straight forward c/c++ & SDL code.
>>  But I am not feeling the straightforwardness of it though. I don't
>>  know if its a c++ issue or SDL. I try to call SDL fx code from an
>>  external .cpp/.h. I am trying to make these reusable and to release
>>  main from clutter. Everything runs smoothly until the second block:
>> 

>> 

>> 

>> 
>> 
>> Code:
>> 
>> 

>> 

>> int horizontal = 0;

>>  int vertical = 0;

>>  SDL_DisplayMode dm;

>>  cout<<"Gobot call:";

>>  gobot(horizontal, vertical,&dm);
>> 
>> 

>> 

>> 

>> 

>> 
>> 
>> Code:
>> 
>> 

>> 

>> #ifndef GOBOT_CPP_

>>  #define GOBOT_CPP_

>> 

>>  #include "SDL.h"

>>  #include "gobot.h"

>> 

>> 

>>  int gobot( int &horizontal, int &vertical, &dm )

>>     {

>>        //SDL_GetDesktopDisplayMode(0, &dm);

>>        horizontal = dm->w;

>>        vertical = dm->h;

>>        return 0;

>>     }

>>     //cout<<"Resolution: x = "<__

>> 
>> 
>> Code:
>> 
>> 

>> 

>> #ifndef GOBOT_H_

>>  #define GOBOT_H_

>>  #include"SDL.h"

>> 

>>  int SDL_GetDesktopDisplayMode(int displayIndex, SDL_DisplayMode
>>  * dm);
>>  int gobot(int horizontal, int vertical, SDL_DisplayMode * dm);

>> 

>>  #endif /* GOBOT_H_ */
>> 
>> 

>> 

>> 

>> error:

>> *In function 'int SDL_main(int, char**)': ..\src\SpearTip.cpp:50:35:
>> error: cannot convert 'SDL_DisplayMode' to 'SDL_DisplayMode*' for
>> argument '3' to 'int gobot(int, int, SDL_DisplayMode*)'
>> gobot(horizontal, vertical, dm);*
>> 

>>  Thanks

>> 

>> _______________________________________________

>>  SDL mailing list

>> [email protected]

>> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

>> 

> _________________________________________________

> SDL mailing list

> [email protected]

> http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

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