c++ type conversion

[chammer]

been a very long time since i've programmed in c/c++, but im back at it. have a problem though with some type conversions. basically my code looks like this... (doing qt/kde programming btw)...

string local_line = line; /* line gets passed to the sub via void blah (char *line) */
string lcd_text = local_line.substr (12, 4);

lCDNumber21->display (lcd_text); /*has to be const QString*/

this all works fine. the problem then becomes...

/* this doesnt work, it errors out no matter how many differnt type conversions i try */
progressBar11->setProgress (lcd_text); /* has to be int */

i've tried what i thought would be the right way ala:

int blah = atof (lcd_text);

but this fails. also i've tried making lcd_text not a string, but a char *...this fails trying to assign the substr to it, however. tried dozens of different ways, with no luck.

i know this is very sparse, but any ideas?
_________________
http://www.nasland.nu
echo '[q]sa[ln0=aln256%Pln256/snlbx]sb3135071790101768542287578439snlbxq' | dc
echo '16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq' |dc

[dma]

line.c_str() should make it a (char *)

[chammer]

thanks for the qstring doc, it actually lead me to something. since i usually try first thing that comes to mind versus thinking about doing something the right way (only 75% of the time ) i ended up just copying what i needed to QString. so...

string blah = hello.substr (12, 4)
..etc etc..

QString temp = blah;
double d = atof (temp);
int i = atoi (temp);

i needed the double for the float (maybe i can just use an int instead?...its been way to long...).

anyways, this is what i was building, i was stuck on that problem for the past 3 hours while searching/researching via google and my c++ books. glad i stopped here though. anyways...

[img:53c5e15ecd]http://www.nasland.nu/nst.png[/img:53c5e15ecd]

(the progress bars are based off a set limit. 65C in this case. just to give you another way of interpreting the degrees.)

was initially going to do this in QtPerl (im a perl monger ) or GTK (i also love GTK), but i figured should anyone want this it'd prolly be best to be as native as possible and i've yet to build a Qt/KDE application in all my years under a Unix flavor. its built around lm_sensors, so...as long as you have lm_sensors and qt...it should run. if anyone wants to give it a try let me know and i'll tar up the source and upload it to me site.
_________________
http://www.nasland.nu
echo '[q]sa[ln0=aln256%Pln256/snlbx]sb3135071790101768542287578439snlbxq' | dc
echo '16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq' |dc

[chammer]

updated it a bit in case anyone is interested...

[img:e715ce3dfd]http://www.nasland.nu/nst4.png[/img:e715ce3dfd]

added the fan speeds and removed the progress bars (they were only getting in the way)
_________________
http://www.nasland.nu
echo '[q]sa[ln0=aln256%Pln256/snlbx]sb3135071790101768542287578439snlbxq' | dc
echo '16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq' |dc

[far]

A more modern way to convert a string to a number: