#!/usr/bin/env python

# 
# two short practice functions in Python
#
# written by e.bonakdarian   march 2010


##############################################################
def greeting(gender, name, hours, gpa):
    #
    # function receives gender (a character, m or f),
    # a name (string), credit hours (integer) and
    # gpa (float). It prints out a gender sensitive
    # information based on the data provided.
    #
    
    if (gender == 'm'):
        addr = "Mr."
    elif (gender == 'f'):
        addr = "Mrs."
    else:
        addr = "Yo!"

    print("%s %s, you have earned a gpa of %.2f "
          "with %d credit hours." % (addr, name, gpa, hours))


    
    
##############################################################
def average_3(val1, val2, val3):
    # takes three numbers and computes and displays
    # their average
    
    # careful not to use "sum"
    
    total = val1 + val2 + val3
    avg = total / 3.0

    print("The average of %.2f, %.2f, %.2f is %.2f" % 
          (val1, val2, val3, avg))



def main():
    average_3(3, 5, 7)
    average_3(-100,5, 100)

    print

    hours = 44

    gpa = 3.5
    greeting('m', 'Jones', hours, gpa)

    gpa = 4.0
    greeting('f', 'Robinson', hours, gpa)

    greeting('X', 'Snodgrass', hours, gpa)


if __name__ == '__main__':
    main()