Merge pull request #2 from outpaddling/master

Replace hard-coded g++ and gcc for portability.

Makefile

@@ -1,16 +1,20 @@
+
+CC ?=	gcc
+CXX ?=	g++
+
 all: multichoose multipermute
 
 #multichoose_recursive: multichoose_recursive.cpp
-#	g++ multichoose_recursive.cpp -o multichoose_recursive
+#	${CXX} multichoose_recursive.cpp -o multichoose_recursive
 
 multichoose: multichoose.cpp multichoose.h
-	g++ multichoose.cpp -o multichoose
+	${CXX} multichoose.cpp -o multichoose
 
 multipermute: multipermute.cpp multipermute.h
-	g++ multipermute.cpp -o multipermute
+	${CXX} multipermute.cpp -o multipermute
 
 cmultichoose: multichoose.c
-	gcc multichoose.c -o cmultichoose
+	${CC} multichoose.c -o cmultichoose
 
 clean:
 	rm cmultichoose