Simplification of rules

makefile

@@ -1,29 +1,24 @@
 SHELL = /bin/sh
 
-all: ppmrw.o
-
-ppmrw.o: 
+build: 
 	gcc ppmrw.c -o ppmrw.o
 
-clean :
+clean:
 	rm -f *.o
 	rm -f new_*.ppm
 
-rebuild: clean ppmrw.o
-
-test6:
-	./ppmrw.o 6 P6I.ppm new_P6I.ppm
-test3:
-	./ppmrw.o 3 P3I.ppm new_P3I.ppm
-retest6: clear rebuild test6
-
 clear :
 	clear
 
-retest36: clear rebuild 
-	./ppmrw.o 6 P3I.ppm new_P6I.ppm
-
-smalltest6: clear rebuild
-	./ppmrw.o 6 B6.ppm new_B6.ppm
-smalltest3: clear rebuild
-	./ppmrw.o 3 B3.ppm new_B3.ppm
+rebuild: clean build
+
+p3to3:
+	./ppmrw.o 3 P3I.ppm new_P3I_3.ppm
+p3to6:
+	./ppmrw.o 6 P3I.ppm new_P6I_3.ppm
+p6to3:
+	./ppmrw.o 3 P6I.ppm new_P3I_6.ppm
+p6to6:
+	./ppmrw.o 6 P6I.ppm new_P6I_6.ppm
+
+fullTest: rebuild clear p3to3 p3to6 p6to3 p6to6