CSC270 GenerateTruthTable.py

One can use python (or any other language) to easily generate truth tables. This is a simple way to test a hypothesis, or to verify special cases in design situations. Don't hesitate to use this approach to save time and generate accurate results.

# truthtable.py  
# D. Thiebaut
# how a simple python program can generate the
# truth table of a boolean function
#
# 3 functions of 3 variables are shown here:
#       _
# f = a.b + c
#     _   _   _
# g = a + b + c
#         _
# h = a + b

def f( a, b, c ):
    return ( a and (not b) ) or c

def g( a, b, c ):
    return (not a) or (not b) or (not c)

def h( a, b, c ):
    return a or not b

def main():
    print( "  a  b  c  |  f  g  h" )
    print( "-----------+---------" )
    for a in [ 0, 1 ]:
        for b in [ 0, 1 ]:
            for c in [ 0, 1 ]:
                print( "%3d%3d%3d  |%3d%3d%3d" % 
                      ( a, b, c,
                        f( a, b, c ),
                        g( a, b, c ),
                        h( a, b, c ) ) )

main()

The output is show below:

  a  b  c  |  f  g  h
-----------+---------
  0  0  0  |  0  1  1
  0  0  1  |  1  1  1
  0  1  0  |  0  1  0
  0  1  1  |  1  1  0
  1  0  0  |  1  1  1
  1  0  1  |  1  1  1
  1  1  0  |  0  1  1
  1  1  1  |  1  0  1