Makefile have some changes. To use make file simply type 'make all'

Makefile

+all: hello
+
+hello: main.o sorting.o
+	g++ main.cpp sorting.cpp -o a.out
+
+
+main.o: main.cpp
+	g++ -c main.cpp
+
+sorting.o: sorting.cpp
+	g++ -c sorting.cpp
+
+clean:
+	rm -rf a.out