[RndTbl] Using math routines (math.h, header files) in C programs.

[Ihor Jakowec]

   I was attempting to use the math routines of the libc library.
The following  program (listed below), would not compile.
A shell session, showing error messages, follows the source
code.

Source code:
#include <stdio.h>
#include <math.h>

int main (void)
{
  printf("The square root of 2.0  is:  % .6f\n", sqrtf(2.0));
}

Shell session showing error message:
$ gcc -o example example.c
/tmp/cc4fVMFv.o: In function `main':
/tmp/cc4fVMFv.o(.text+0x12): undefined reference to `sqrtf'
collect2: ld returned 1 exit status
$

Setting path and and gcc environment variables did not
make the program compile.  Is this feature (math.h), fully
implemented or, unsupported or, depreciated?   Please, tell
me what to do to get this program to work.

-Ihor