everest% CC main.C box.C
main.C:
box.C:
everest% 

everest% a.out
b1: I am a box with length=1.000000, height=2.000000 and width=3.100000
b2: I am a box with length=0.500000, height=2.500000 and width=3.000000
b3: I am a box with length=1.100000, height=3.000000 and width=3.500000
number of boxes = 3


Boxes b1 and b2 are incomparable
Box b1 fits inside box b3
Box b2 fits inside box b3
everest%