Re: typedef enum & typecasting - C / C++ / MFC Discussion Boards

testcrap2-Jul-08 2:49

2-Jul-08 2:49

im trying to implement this example (http://www.codeproject.com/KB/openGL/GLBase.aspx) into my own little app.
cause i want to learn opengl,c++ & oop.

my german compiler (VC++ 2008 Express Edition) tells me there is in an error in the code.
basicly it sais 'int' cannot be converted to VSYNC, converting into an enumeration requires an explicit typecasting.

code:

in misc.h:

...
typedef enum tagVSYNC
{
VSync_Default = 0x0001,
VSync_On = 0x0002,
VSync_Off = 0x0003

} VSYNC, *PVSYNC;

typedef struct
{
VSYNC Status;
HWND hWnd;
HDC hDC;
BYTE nBPP;
BYTE nRefresh;
bool bFullscreen;
bool bZoomed;

} RENDERARGS, *PRENDERARGS;
...

in WinMain.cpp:

...
RENDERARGS Args={0}; <-this is the line the compiler complains about
...

can someone please help me?

modified on Wednesday, July 2, 2008 11:55 AM

Re: typedef enum & typecasting

_AnsHUMAN_ 2-Jul-08 2:54

_AnsHUMAN_

2-Jul-08 2:54

testcrap wrote:
RENDERARGS Args={0};

This is used to initialize the elements of an array. RENDERARGS isn't an array

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: typedef enum & typecasting

David Crow2-Jul-08 4:53

David Crow

2-Jul-08 4:53

It is a legitimate statement. The problem is that Status is an enum.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: typedef enum & typecasting

KarstenK2-Jul-08 3:09

KarstenK

2-Jul-08 3:09

there is no enum tagVSYNC for 0. Dead | X|

Greetings from Germany

Re: typedef enum & typecasting

testcrap2-Jul-08 3:17

testcrap

2-Jul-08 3:17

if i change typedef to

typedef enum tagVSYNC
{
VSync_Undefined = 0x0000,
VSync_Default = 0x0001,
VSync_On = 0x0002,
VSync_Off = 0x0003

} VSYNC, *PVSYNC;

the error stays the same.
if i remove "VSYNC Status;" from the struct RENDERARGS it gets initialized without a problem.
is there a quick way to initialize RENDERARGS with null?

Re: typedef enum & typecasting

KarstenK2-Jul-08 3:39

KarstenK

2-Jul-08 3:39

try a memset.

Greetings from Germany

Re: typedef enum & typecasting

testcrap2-Jul-08 3:41

testcrap

2-Jul-08 3:41

if i initialize Args with this line it works:
RENDERARGS Args={VSync_Undefined,0,0,0,0,0,0};

also a little test works:
tagVSYNC test=VSync_Undefined;
tagVSYNC test2=(tagVSYNC)0;

can i get this line to work with some trick?
tagVSYNC test=0;

thx 4 help so far !

Re: typedef enum & typecasting

David Crow2-Jul-08 4:59

David Crow

2-Jul-08 4:59

testcrap wrote:
can someone plaes help me?

Have you considered something like:

typedef struct tagRENDERARGS
{
    VSYNC Status;
    HWND hWnd;
    HDC hDC;
    BYTE nBPP;
    BYTE nRefresh;
    bool bFullscreen;
    bool bZoomed;
 
    tagRENDERARGS()
    {
        Status = VSync_Default;
        hWnd = 0;
        hDC = 0;
        nBPP = 0;
        nRefresh = 0;
        bFullscreen = 0;
        bZoomed = 0;
    }
 
} RENDERARGS, *PRENDERARGS;
...
RENDERARGS Args;

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: typedef enum & typecasting

testcrap2-Jul-08 5:55

testcrap

2-Jul-08 5:55

thats it!
thx

occupied port

George_George2-Jul-08 2:41

George_George

2-Jul-08 2:41

Hello everyone,

Any tool could be used to detect which process or module (e.g. DLL) is occupying a specific TCP port?

When I write code to bind to a specific port, there is always error says the port is occupied. I typed netstat but the port is never showed. Do I need some special parameter to netstat?

thanks in advance,
George