rob@uokmax.UUCP (Robert K Shull) (12/01/88)
I'm have some problems using the "data" window in the Lightspeed C debugger.
I'm trying to change the value of a floating point number.
Suppose I have the following program:
#include <stdio.h>
main()
{
float a;
int b;
a = 1;
for(b=0;b<100;b++)
a+=1;
printf("a=%d\n",a);
}
With the program "stepped" to the line "a+=1;", I switch to the data window
and try to change the value of a, which I've been monitoring. I can set
the value of a to 0, but not to anything else.
If I go back to LSC, change the type of a to "int" and re-run the debugger,
I can change the value of a with no problem.
System is: Mac II with 2-meg, System 6.0.2, LSC 3.0p2, MacsBug 5.5
Does anyone have a suggestion?
Thanks,
Robert
--
Robert K. Shull
att!occrsh!uokmax!rob or sun!texsun!uokmax!robjct@geowhiz.UUCP (John C. Terranova) (12/03/88)
In article <2088@uokmax.UUCP> rob@uokmax.UUCP (Robert K Shull) writes: >Suppose I have the following program: >#include <stdio.h> >main() >{ > float a; > int b; > > a = 1; > for(b=0;b<100;b++) > a+=1; > printf("a=%d\n",a); >} > >With the program "stepped" to the line "a+=1;", I switch to the data window >and try to change the value of a, which I've been monitoring. I can set >the value of a to 0, but not to anything else. >If I go back to LSC, change the type of a to "int" and re-run the debugger, >I can change the value of a with no problem. You will notice that 1 is not the same as 1.0. 1 is an integer and 1.0 is a float. With this in mind, did you try to assign 1.0 to the float variable or just 1? The debugger is really not a compiler (I think) and may not be able to typecast numbers for us. If you tried 1.0 and it didn't work then it sounds like the debugger is broken. ------------------------------------------------------------------------------ John Terranova | What the hell do I know? | I'm not a Computer Science CS, BS to be | I come from Waunakee! | undergraduate, but I play -------------------+---------------------------+ one at school. ARPA: jct%geowhiz.uucp@spool.cs.wisc.edu +------------------------------ BITNET: jct%geowhiz.uucp%spool.cs.wisc.edu@vms3.macc.wisc.edu ------------------------------------------------------------------------------ I once believed in causes, too. And had my pointless point of view. --Billy Joel, "Angry Young Man"
rob@uokmax.UUCP (Robert K Shull) (12/05/88)
In article <962@geowhiz.UUCP> jct@geowhiz.UUCP (John C. Terranova) writes: >In article <2088@uokmax.UUCP> rob@uokmax.UUCP (Robert K Shull) writes: > > (LSC Debugger problem) > >You will notice that 1 is not the same as 1.0. 1 is an integer and >1.0 is a float. With this in mind, did you try to assign 1.0 to the Yes, I tried just about every format I could think of. Robert -- Robert K. Shull att!occrsh!uokmax!rob or sun!texsun!uokmax!rob