how to send double to Pt_ARG_TEXT_STRING

QNX DEVELOPERS GUI Programming
1

Dear all,

I am new to qnx so kindly pardon me for my silly qns.

I am trying to display a value to a label using the following method

sprintf(cs, "%2.1f",s[i]); sprintf(cd, "%2.1f",d[i]); PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0); PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);\

but is seems to crash the system

but when i used a static string like
PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,“TEST”, 0);

it seems to be ok.
It seems that i can use sprintf to pass the variable over.

Can anyhow help me out???
thanks in advance

2

it seems that it is not due to sprintf but when i insert a loop into it

i am really puzzle why a loop will cause a crash

    	for (i=1;i<15;i++){
    	sprintf(cs, "%2.1f",s[i]);
	sprintf(cd, "%2.1f",d[i]);

       	PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
       	PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
    	}

error is:
Process 446480 (AntiB_gNiNo_NB1207392159576) terminated SIGSEGV code=1 fltno=11 ip=0117e154 mapaddr=00101154. ref=00000014

3

While this doesn’t explain your problem, you might want to note that if your code was working, the first 14 time though the loop would accomplish nothing visible.

4

To add to Mitch’s comment, I find the i=1 odd typicaly it would be 0. Also how have you defined the cs and cd variables?

5

For the conversion in sprintf I would use ‘lf’ (LF) if the variable is defined as double, at waht point does it crash?