Display Double in .uir text message

[BiedaK]

Hello everyone,

I am quite new in LabWindows/CVI, but I have already managed to built quite big software.

I have a difficulty with displaying double varible in text message on one of my .uir Panels.
Problem is that I do not know how to transform double varible into string or char[].
I have not found similar topis, so thats why I wrote.

I am using:

SetCtrlVal(panelHandleCH75,CH75_vrefb_disp, ... );

and as a 3rd varible to this function should be  string made of double varible vrefb ( format "%1.3f").

I would be gratefull for help.
Thanks in advance

Best

Chris

[Wolfgang]

The basic insight is that CVI is based on C

Hence you can use the standard formatting functions of ANSI C such as sprintf; you can also use some library functions provided by CVI such as Fmt ();

[BiedaK]

I have tryed to use sprintf, but it trows a fault abou pointer to chr  while i have pointer to char[].
I am probably using it in a wrong way.
How would you use it?

[Wolfgang · Accepted solution]

You can use the Interactive Execution window to test it quickly. The following example works:

static char string [ 20 ];

static double liter = 1.55;

sprintf (string, "%.2f Liter\n" ,liter);

Please note that this a forum about CVI, not C

[BiedaK]

Yes,  easy problem in C.
I thought that CVI uses there something else.

I maganed:

//char falpha[128];
//float f = 0.44f;
//sprintf(falpha,"%0.2f",f);