GCC Fatal error output: no such file

i run this test like you:

 $ gcc main.c -o test2
 $ ./test2
this is your number`s = 13 with string = 13

what files in my folder:

 $ ls -l
-rw-r--r-- 1 dan dan  401 Окт 15 00:54 main.c
-rw-r--r-- 1 dan dan  204 Окт 12 00:01 main.h
-rw-r--r-- 1 dan dan 1984 Окт 15 00:54 main.o
-rwxr-xr-x 1 dan dan 8720 Ноя  3 00:09 test2

gcc look *.c files only in working directory, so to check this:

 $ pwd
/home/dan/git/C/test1

and lets run compile in wrong directory:

 $ cd ..
 $ pwd
/home/dan/git/C
 $ gcc main.c -o test2
gcc: error: main.c: No such file or directory
gcc: fatal error: no input files
compilation terminated.

1. so make sure your work dir is correct, use CD command to change you current dir, more in "man cd"
2. start to use MAKE utill
3. you don't need give *.c files exec permission