The program for book c++ primer 5th CH15 homework. Truely OOP c++ exercise. Run ./make.sh to complie Run ./main 1 2 3 to run an example Data for test: 1 2 3 2 3 3 3 4 5 4 5 6 1 3 5 6 1 2 7 8 2 2 2 1 5 8 9 3 9