[linux-help] A c problem

[bruce <bbales@xxxxxxx>]

I'm in chapter 2 of Kernighan and Richey, trying to learn c programming.
I have been using gcc to compile my programs.  I wrote a very simple program 
using math.hand sqrt:

#include <stdio.h>
#include <math.h>
main()                   {
double m, n=8.0;
m=sqrt(n);
printf("%f\n",m);
return 0;
}

and tried to compile it with "gcc -o test-p45 test-p45.c"

It errored with 
 undefined reference to `sqrt'

Same thing when I used kgcc and gcc3.
I compiled it with g++ and it compiled and ran correctly.

Can anyone tell me why gcc seems to not be linking to math.h?
Or should I be using g++ ? (I thought g++ was for C++ and gcc was for plain 
old c.

I am using RH 7.2. and KDE.
bruce
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