#password
tar xvf chcode.tar
# move to the new directory:
cd interactive-ch
# now compile the codes:
f77 -o logisticmap logisticmap.f
f77 -o henonmap henonmap.f
f77 -o echaosmap echaosmap.f
f77 -o standardmap standardmap.f
# move back to original directory:
cd ..