dbPrint prob - GameCreators Forum

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Let the game begin

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Joined: 31st May 2011

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Posted: 17th Sep 2011 17:29

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here's a line of my code

dbPrint("Hello World");

It works well but not the way i want it to be. I want the next print to simply be appended in front of it and not on the next line.
I read about it in the Dark GDK documentation which says that if I place a semi-colon in front of it, then the next print statement will be placed right in front of the previous statement. It was vague because I think adding a semi-colon would terminate the statement there. In a nutshell, I didn't get it. I need somebody to help me

This is TDM (i.e. The Dark Man).

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Lord_Migit

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Posted: 17th Sep 2011 18:59

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I'm still new at this engine but i mite be able to help. Firstly i find it a lot easier to use the text commands as they have more control.

dbText() will allow you to specify, in X and Y co-ordinates, where you want the text to appear. You can also do a few other things to it like make it opaque, change font, size, bold & italic etc.

As for dbPrint, i believe if you use dbSetCursor() then you can choose the X and Y co-ordinates that dbPrint will output to next. It has 2 parameters: void dbSetCursor ( int iX, int iY )

Hope this helps, let us know how you get on.

"Knowledge is Power"

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Let the game begin

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Posted: 18th Sep 2011 04:28

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@ Lord_Migit
I know about it but I want to do the same with only dbPrint(). You should read a little about the description of this command in the DGDK documentation. Then you'll know what I am trying to say.
Here's a little program.
int i,j;
for (i=1; i<=5; ++i

{
for (j=1; j<=i; ++j

{
dbPrint(dbStr$(j));
}
dbPrint(" ");
}

Now I want it to print:-
1
12
123
1234
12345

But as you may have guessed, it won't do so. It because the statement which says dbPrint(dbStr$(j)); will simply append the next print on the next line which I don't want, instead it should place the next print in front of it. You may help me by writing the code in a better way.

This is TDM (i.e. The Dark Man).

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Dar13

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Location: Microsoft VisualStudio 2010 Professional

Posted: 18th Sep 2011 07:17 Edited at: 18th Sep 2011 07:18

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I think this is what you are trying to do.

+ Code Snippet

std::string printStr;
for(int i=0; i<5; ++i)
{
   const char* str=dbStr(i+1);
   printStr.append(str);
   dbSetCursor(0,0);
   dbPrint(printStr.c_str());
   delete str;
}

Note: Uses the standard libraries for C++(the std::string class in particular), and I delete the 'str' variable to prevent a memory leak.

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Posted: 18th Sep 2011 18:45

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@ Dar 13
I tried to paste your code in the main DGDK loop, but the following errors occured

+ Code Snippet

1>------ Build started: Project: loop, Configuration: Debug Win32 ------
1>Compiling...
1>Main.cpp
1>c:\users\windows seven\documents\visual studio 2008\projects\loop\loop\main.cpp(26) : error C2665: 'dbPrint' : none of the 4 overloads could convert all the argument types
1>        c:\program files\the game creators\dark gdk\include\darksdkcore.h(40): could be 'void dbPrint(LONGLONG)'
1>        c:\program files\the game creators\dark gdk\include\darksdkcore.h(41): or       'void dbPrint(double)'
1>        c:\program files\the game creators\dark gdk\include\darksdkcore.h(42): or       'void dbPrint(LPSTR)'
1>        while trying to match the argument list '(const char *)'
1>Build log was saved at "file://c:\Users\Windows Seven\Documents\Visual Studio 2008\Projects\loop\loop\Debug\BuildLog.htm"
1>loop - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I guess I mite be making a mistake somewhere. So, it would be good if you send me the complete code. Thank you.

This is TDM (i.e. The Dark Man).

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Dar13

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Posted: 18th Sep 2011 21:06

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Revised:

+ Code Snippet

std::string printStr;
for(int i=0; i<5; ++i)
{
   const char* str=dbStr(i+1);
   printStr.append(str);
   dbSetCursor(0,0);
   dbPrint(const_cast<char *>(printStr.c_str()));
   delete str;
}

As I don't use DarkGDK anymore, this should work but I'm not sure.

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Mr Bigglesworth

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Posted: 19th Sep 2011 05:49

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@Let the game begin
You may have to change your project to "Multi-Threaded /MD" in "Project Settings -> C/C++" to get the standard library to work correctly.

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JTK

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Posted: 19th Sep 2011 15:45

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Dbprint automatically appends a new line char to the end of the string. Use dbprintc instead. I'm pretty sure that's the one you need...

jtk

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Let the game begin

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Posted: 19th Sep 2011 18:49

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@JTK
Thanks for the suggestion of dbPrintC. My program is working very well now.

@Dar 13
I understand your program now. Since I am new to here, I didn't know about operator overloading that you've done in your code snippet. Well, thanks anyway.

Now it's time to close this thread

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Mireben

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Posted: 19th Sep 2011 20:35 Edited at: 20th Sep 2011 07:09

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@Dar13: To prevent memory leak, delete[] str should be used, with square brackets. However, it would be better to eliminate dbStr from the program.

@Let the game begin: You can use Dark GDK commands to achieve the printout you want, but it's also easy to do with native C/C++ commands and character arrays. I would use the language itself where possible.

+ Code Snippet

#include "DarkGDK.h"

void DarkGDK(void)
{
	dbSyncOn();
	dbSyncRate(60);

	char Buffer1[20] = "", Buffer2[20] = "";

	while (LoopGDK())
	{
		dbCLS();

		for (int i=1; i<=5; ++i)
		{
			for (int j=1; j<=i; ++j)
			{
				sprintf(Buffer2, "%d", j);
				strcat(Buffer1, Buffer2);
			}
			dbPrint(Buffer1);
			Buffer1[0] = 0;
		}

		dbSync ( );
	}
}

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Mireben

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Posted: 20th Sep 2011 07:10

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Edited the above post to recommend sprintf instead of itoa. (Just remembered that itoa is compiler-specific, and besides, it's good if you remember sprintf the next time you need a formatted string output.)

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Let the game begin

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Posted: 20th Sep 2011 09:48

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@Mireban

Thanks for the suggestion but I was asking about the Dark GDK - specific commands instead of the c++ inbuilts. Well thanks anyway.

This is TDM (i.e. The Dark Man).

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WLGfx

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Posted: 20th Sep 2011 19:07

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You will find that if you use the C++ sprintf() function, it is more reliable and safer than trying to use DGDK strings. DGDK strings tend to have a bad habit of causing memory leaks.

+ Code Snippet

char buffer[200];
sprintf(buffer, "Integer = %d", 100);
dbPrint(buffer);

Is just the same as Mireben has suggested.

My tip is to use C/C++ use of strings, whether it be char (easier to learn) or std::string and avoid any of DGDK string manipulation commands.

Warning! May contain Nuts!

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Dark GDK / dbPrint prob