Hey there, I've never actually used a forum to ask for help on any sort of project before, but I'm a little stuck.. okay, a lot. =D It's probably something really stupid and minuscule, though. Anyway, heres the project.. I hope it's not too confusing:

Write a program that asks the user for the diameter and the cost of a pizza.

Use a function (getInputs()) to get the diameter and cost of the pizza and return the two values.

Use a function (calcArea(diameter)) to calculate the area of the pizza in square inches.

Use a function (calcCostPerSqInch(area, cost)) to calculate the area of a pizza in square inches.

Use a function (printResults(diameter, cost, area, perSq)) to print the results.

Annnnd, here's what I have so far...:

``````import math

def main():

intro()

diameter, cost = getInputs()

calcArea(diameter)

calcCostPerSqInch(area, cost)

printResults(diameter, cost, area, perSq)

def getInputs():
#prompt for the diameter and cost from the user
diameter = input("Enter the diameter (in inches): ")
print
print
cost = input("Enter the cost (in dollars): ")
print
print
return diameter, cost

#create calcArea function
def calcArea(diameter):
area = math.pi * (diameter / 2) ** 2

#create calcCostPerSqInch function
def calcCostPerSqInch(area, cost):
perSq = area / cost

#create printResults function
def printResults():
print "For a diameter of ", diameter," inches"
print "and a cost of \$", cost,":"
print "Area in square inches: ",  area
print "Cost per square inch:     \$", perSq

def intro():
#print explination to the user
print "Program to calculate the area and cost"
print "per square inch of a pizza."
print "You will be asked to enter the diameter"
print "of the pizza in inches and the cost in dollars."
print

main()``````

## All 2 Replies

i am here

I dont know why you marked it solved,but write some abought the problem you have.

So think you got a assignment about Top-Down Design.
You are on the right path.

Top-Down Design u call main and you work your way down one function/problem at the time.

Gone show how to break this opp.
The you see problem more clearer.

Part 1

``````import math

def main():
intro()

def intro():
#print explination to the user
print "Program to calculate the area and cost"
print "per square inch of a pizza."
print "You will be asked to enter the diameter"
print "of the pizza in inches and the cost in dollars."
print

main()``````

First part we just test the the intro() function.
Work fine.

Part 2 we test getInputs() and that it print correct(printResults())

``````#!/usr/bin/env python
import math
def main():
intro()
diameter, cost = getInputs()
printResults(diameter, cost)

def intro():
#print explination to the user
print "Program to calculate the area and cost"
print "per square inch of a pizza."
print "You will be asked to enter the diameter"
print "of the pizza in inches and the cost in dollars."
print

def getInputs():
#prompt for the diameter and cost from the user
diameter = input("Enter the diameter (in inches): ")
print
print
cost = input("Enter the cost (in dollars): ")
print
print
return diameter, cost

#create printResults function
def printResults(diameter, cost):

print "For a diameter of ",diameter ," inches"
print "and a cost of \$", cost,":"

main()
'''output-->
You will be asked to enter the diameter
of the pizza in inches and the cost in dollars.

Enter the diameter (in inches): 5

Enter the cost (in dollars): 30

For a diameter of  5  inches
and a cost of \$ 30 :
'''``````

So part 2 is working

Part 3 here was you problem.
With calling of function calcArea() and calcCostPerSqInch()
I removed this 2 lines.
calcArea(diameter)
calcCostPerSqInch(area, cost)

And put the call of calcArea(diameter) in the printResults() function
you see put the call of calcCostPerSqInch() here
print "Cost per square inch is %.2f" % (calcCostPerSqInch(area, cost))

So the final part

``````#!/usr/bin/env python
import math

def main():
intro()
diameter, cost = getInputs()
printResults(diameter, cost, calcArea(diameter))

def intro():
#print explination to the user
print "Program to calculate the area and cost"
print "per square inch of a pizza."
print "You will be asked to enter the diameter"
print "of the pizza in inches and the cost in dollars."
print

def getInputs():
#prompt for the diameter and cost from the user
diameter = input("Enter the diameter (in inches): ")
print
print
cost = input("Enter the cost (in dollars): ")
print
print
return diameter, cost

#create calcArea function
def calcArea(diameter):
area = math.pi * (diameter / 2) ** 2
return area

#create calcCostPerSqInch function
def calcCostPerSqInch(area, cost):
perSq = area / cost
return perSq

#create printResults function
def printResults(diameter, cost, area):

print "For a diameter of",diameter,"inches"
print "and a cost of \$", cost,":"
print "Area in square inches is %.2f" % (area)
print "Cost per square inch is %.2f" %  (calcCostPerSqInch(area, cost))

main()
'''output-->
Program to calculate the area and cost
per square inch of a pizza.
You will be asked to enter the diameter
of the pizza in inches and the cost in dollars.

Enter the diameter (in inches): 5

Enter the cost (in dollars): 30

For a diameter of 5 inches
and a cost of \$ 30 :
Area in square inches is 12.57
Cost per square inch is 0.42
'''``````
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