# LargestOf3.py
#
# Description: Returns the largest number out of 3 numbers.
# Requirements: Cannot use the max( ) built-in function
#               Cannot use the word max to name your function
#
# Anne Lavergne
# Date: Feb. 9 2024

def largestOf3(number1, number2, number3):
  """Returns the largest number out of 3 numbers."""

  # Start by assuming that number1 is the largest of the 3 numbers
  maxNumber = number1
  
  # Verify the assumption by comparing number2 with maxNumber
  # Note that at this point maxNumber == number1
  if number2 > maxNumber :
    
    # Readjust maxNumber to reflect the new assumption:
    # that number2 is the largest of the 3 numbers    
    maxNumber = number2
  
  # Verify the assumption by comparing number3 with maxNumber
  # Note that at this point maxNumber == number1 OR maxNumber == number2 
  if number3 > maxNumber :

    # Readjust maxNumber to reflect the new fact (no longer an assumption):
    # that number3 is the largest of the 3 numbers    
    maxNumber = number3
  
  # Return the largest of the 3 numbers
  return maxNumber


#*** Main part of my program

# Call maxOf3 with three integers as its arguments
# Test Case 1:   Test data: 3,5,4      Expected result: 5 (2nd number)
print(largestOf3(3,5,4))

# Call maxOf3 with three integers as its arguments
# Test Case 2:   Test data: -2,-7,-6   Expected result: -2 (1st number)
print(largestOf3(-2,-7,-6))

# Call maxOf3 with three integers as its arguments
# Test Case 3:   Test data: 12,15,32   Expected result: 32 (3rd number)
print(largestOf3(12,15,32))

# Can you think of ways of improving this program?