CFLAGS = -Wall -Wextra -W -ggdb3 -O2 -std=c++11
a.out: main.o student.o sort.o
    g++ $(CFLAGS) main.o student.o sort.o
main.o: main.cpp student.h sort.h
    g++ $(CFLAGS) -c main.cpp
sort.o: sort.cpp sort.h
    g++ $(CFLAGS) -c sort.cpp
student.o: student.cpp student.h
    g++ $(CFLAGS) -c student.cpp
clean:
    rm -rf *.out *.o trash.txt tmp.txt