1a_12 : a_12.o \ 2 f_02.o 3 4 g++ a_12.o \ 5 f_02.o \ 6 -o a_12 7 8a_12.o : a_12.cpp 9 10 g++ -c a_12.cpp 11 12f_02.o : f_02.cpp 13 14 g++ -c f_02.cpp