corrected makefile and added gitignore

source_codes/sorting/.gitignore

-tris_base_part
-tris_base
-quicksort
-heapsort_main
-heapsort.o
-quicksort_part

source_codes/sorting/tri_2_piles/.gitignore

+tri_2_piles.o
+pile_ptr.o
+pile_ptr.h.gch
+tri_2_piles

source_codes/sorting/tri_2_piles/Makefile

@@ -7,15 +7,16 @@ all: tri_2_piles
 
 tri_2_piles: tri_2_piles.o pile_ptr.o
 	$(CC) -D TYPE=int $(CFLAGS) -o $@ $^ $(LDFLAGS)
+	@echo *.gch >> .gitignore
 	@echo $@ >> .gitignore
 
 tri_2_piles.o: tri_2_piles.c
 	$(CC) -c -D TYPE=int $(CFLAGS) $^ $(LDFLAGS)
-	@echo *.o >> .gitignore
+	@echo $@ >> .gitignore
 
 pile_ptr.o: pile_ptr.c pile_ptr.h
 	$(CC) -c -D TYPE=int $(CFLAGS) $^ $(LDFLAGS)
-	@echo *.o >> .gitignore
+	@echo $@ >> .gitignore
 
 .PHONY: clean all