@echo off
cd %USERPROFILE%\Desktop\somefolder
for %%f in (*.c) do (
	echo %%~nf
	gcc -c %%~nf.c -o %%~nf.o
)
pause

This will loop through files in somefolder with the extension .c, print out the filename and compile the files.

Batch code to process files with a certain filename in a directory

directory

DOS Batch