[Tutor] Defining functions

[Ryan Davis]

Did you put them in quotes?

#
If choice == 'c':
   ...
#

Thanks,
Ryan 

-----Original Message-----
From: tutor-bounces at python.org [mailto:tutor-bounces at python.org] On Behalf Of John Carmona
Sent: Thursday, March 24, 2005 5:52 PM
To: tutor at python.org
Subject: [Tutor] Defining functions

Hi there,

I have written (well almost as I copied some lines from an existing example) 
this little programme - part of an exercise.

#By J Carmona
#Programme that compute area for
#circle, square, rectangle

def area_rect():
        length = input("Length: ")
        width = input ("Width: ")
        print "The area is: ",length*width

def area_circ():
        radius = input("What is the radius?: ")
        print "The area is approximately: ", 3.14159*(radius**2)

def area_squ():
        side = input ("What is the length of one side?: ")
        print "The area is: ", side*side

def print_options():
        print "------------------------------"
        print "Options:"
        print "1. print options"
        print "2. calculate circle area"
        print "3. calculate square area"
        print "4. calculate rectangle area"
        print "5. quit the programme"
        print "------------------------------"
        choice = input("Choose an option: ")
        if choice == 1:
            print_options()
        elif choice == 2:
            area_circ()
        elif choice == 3:
            area_squ()
        elif choice == 4:
            area_rect()
        elif choice == 5:
            print_options()
#Call starting menu
print_options()

If I try to change the 1, 2, 3, 4 or 5 by a letter i.e. a, b, c, d, e the 
programme stop functionning. I get an error message saying that

Traceback (most recent call last):
  File "C:/Python24/Example/area_cir_squ_regt.py", line 39, in -toplevel-
    print_options()
  File "C:/Python24/Example/area_cir_squ_regt.py", line 27, in print_options
    choice = input("Choose an option: ")
  File "<string>", line 0, in -toplevel-
NameError: name 'c' is not defined

What am I missing? Thanks
JC


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