On 12/18/2012 08:05 PM, Gina wrote:
I have Python version 3.
when the program begins, it prints out the main menu and then asks you
for your choice - just like it is supposed to
you enter your choice, and the next menu pops up, and below the menu
it says "None" on the line before your next choice is asked for
i dont know why it does this or how to make it go away
sorry the menu looks funny(they are supposed to be shapes)
i didnt include the code for all of the functions but the same thing
happens for each of the four choices
CODE BEGINS HERE:
def parallelogram_area(side1, side2):
"find the area of a parallelogram"""
solution1 = float(side1 * side2)
return solution1
def quadrilateral_perimeter(side1, side2, side3, side4):
"""find the perimeter of a quadralateral"""
solution1 = float(side1 + side2 + side3 + side4)
return solution1
def trapezoid_area(side1, side2, height):
"""find the area of a trapazoid"""
solution1 = float(side1 + side2)
solution2 = float((height)/2)
solution3 = float(solution1 * solution2)
return solution3
def menu_quad():
"""Display menu for quadrilaterals"""
print(
"""
Quadrilaterals
0 - Return to main menu
1 - Parallelogram (area)
2 - Trapezoid (area)
3 - Quadrilateral(perimeter)
"""
)
choice = None
while choice != "0":
print(
"""
Menu
0 - Exit
1 - Quadrilaterals 3 - Circles
_________________ **
| | ********
| | ************
| | **************
| | **************
| | ************
|_________________| ********
**
2 - Triangles 4 - 3D
/\ /|\
/ \ / | \
/ \ / | \
/ \ / | /
/ \ / | /
/__________\ /_____|/
"""
)
choice = input("Choice: ")
if choice == "0":
print("Good-bye.")
#main
if choice == "1":
#quadrilaterals
print(menu_quad())
quad_choice = input("Choice: ")
if quad_choice == "0":
print()
if quad_choice == "1":
#parallelogram
side1 = float(input("Side 1: "))
side2 = float(input("Side 2: "))
area = parallelogram_area(side1, side2)
print("The area of the parallelogram is", area)
if quad_choice == "2":
#trapezoid
side1 = float(input("Side 1: "))
side2 = float(input("Side 2: "))
height = float(input("height: "))
area = trapezoid_area(side1, side2, height)
print("The area of the trapezoid is", area)
if quad_choice == "3":
#quadrilateral
side1 = float(input("Side 1: "))
side2 = float(input("Side 2: "))
side3 = float(input("Side 3: "))
side4 = float(input("Side 4: "))
perim = quadrilateral_perimeter(side1, side2, side3, side4)
print("The perimeter of the quadrilateral is", perim)
else:
print("Sorry, that is not a valid choice :(")
input("Press enter to exit.")
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It looks like you have print(menu_quad()) which prints
the return value of that function. When function has no
explicit return value in python, it returns None.
You probably mean to return the string in that function
instead of printing it there.
- mitya
--
Lark's Tongue Guide to Python: http://lightbird.net/larks/
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