Compile together GCC files in linux

In linux, GCC files are compiled together-general Linux technology-Linux programming and kernel information. The following is a detailed description. Do you know how to compile a few files with gcc? If you don't know, you can take a look. If you know, please give me some advice. This is a teacher's class exercise, the purpose is to familiarize us with how to compile the file together under the gcc of linux.

The question is very simple, that is, entering a floating point and then outputting the square

/* Calc. c file */
# Include
# Include "sq. h"
# Include "printout. h"
Int main ()
{
Float f;
While (scanf ("% f", & f ))
{
Pout (squre (f ));
}
Return 0;
}

/* Printout. h file */
# Include
Void pout (float result );

/* Printout. c file */
# Include "printout. h"
Void pout (float result)
{
Printf ("the result is % f \ n", result );
}

/* Sq. h file */
Float squre (float f );

/* Sq. c file */
# Include "sq. h"
Float squre (float f)
{
Return f * f;
}

Put the above file in the same path, and then terminal (if there is no error running)

Gcc calc. c-c
Gcc printout. c-c
Gcc sq. c-c
Gcc calc. c printout. c sq. c-o calc (you can change other names here ).
./Calc is finished.