ammended compile.sh and .gitignore

.gitignore

@@ -1 +1,2 @@
 test.c
+test

compile.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
-[ "${1}" == "clean" ] && rm $(ls --color=no -1 | grep -v "\(\.c\|\.sh\)$") && exit
+[ -z "${1}" ] && echo "error: no arguments given" && exit 2
+[ "${1}" == "clean" ] && rm -v $(ls --color=no -1 | grep -v "\(\.c\|\.sh\)$") && exit
 gcc -Wall -Wextra -O2 -g -o "${1:0:-2}" "${1}"
 exit