Outputing doubles and other number data types with dbText?

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Stucky

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Posted: 9th May 2009 11:05

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Its always bugged me how dbText uses char* as a string, its just a huge pain in the ass if you want to output numbers. After looking around I found this thread here, so I already know you can convert integers into a char* to be used in dbText, but what I need is a way to output doubles and floats using dbText.

Thanks

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go2none

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Posted: 9th May 2009 12:34

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You can output int and float using dbText and dbStr.

or you can try:

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// the main entry point for the application is this function
void DarkGDK ( void )
{
// turn on sync rate and set maximum rate to 60 fps
dbSyncOn   ( );
dbSyncRate ( 60 );

char text_string[40];
double my_double = 12.1234;
float  my_float	 = -11.11;


// our main loop
while ( LoopGDK ( ) )
{
sprintf (text_string, "Double: %0.4f", my_double); dbText (10,10, text_string);
sprintf (text_string, "Float: %0.2f", my_float); dbText (10,25, text_string);
dbSync ( );
}

// return back to windows
return;
}

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Lilith

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Location: Dallas, TX

Posted: 9th May 2009 17:49 Edited at: 9th May 2009 17:50

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Quote: "Its always bugged me how dbText uses char* as a string"

I'm not sure how you'd want it otherwise. The name of the function is dbText. Yes, the function could be overloaded but there are a number of alternatives. You can always write your own overloaded functions.

If you're restricting your coding to the functions provided by Dark GDK then you're doing yourself a big disfavor. The C++ standard library has quite a number of conversion functions and when it all comes down to it, there's always sprintf() to format your output. It behooves you to learn at least what functions are available even if you don't memorize their footprint. You'll know you can look them up when you have need and won't need to re-invent functions.

Lilith, Night Butterfly
I'm not a programmer but I play one in the office

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Stucky

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Posted: 10th May 2009 04:31

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That worked, thanks for the help. I've never actually used sprintf before, because it looked so similar to printf I used you needed to use it in a console application so I didn't look into it.

Lilith, I am using other c libraries. I'm creating a solar system simulation so cmath and ctime are pretty much a must. Also using string of course, I just never knew sprintf was capable of turning number data types into char *.

Thanks for the help guys!

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DnB

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Posted: 12th May 2009 20:09

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Yea, I had the same problem with dbText when I was trying to display numbers. It is annoying. Although try this

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