Update compile.sh

src/compile.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 #Don't know cmake so here's a simple bash script for compiling
 g++ -c Directory.cpp -o Directory.o
-g++ Main.cpp Directory.o -o File-viewer
-
+g++ -c Functions.cpp -o Functions.o
+g++ Functions.o Directory.o Main.cpp -o File-viewer