Python predecessor示例

示例#1

文件： sub.py 项目： avinash-ducs/pythonCodes

def mySub(number1, number2):
    '''
	Objective      : To compute the sum of given two numbers.
	Input Variabes :
	       number1 : integer - First number inputted by user.
	       number2 : integer - Second number inputted by user.

	Return Value   : Difference of given two numbers.
	'''
    #Approach      : Use of recursion and myIncrement function.
    if number2 != 0:
        number1 = pred.predecessor(number1)
        number1 = mySub(number1, pred.predecessor(number2))

    return number1

示例#2

def mySum(number1, number2):
    '''
	Objective      : To compute the sum of given two numbers.
	Input Variabes :
	       number1 : integer - First number inputted by user.
	       number2 : integer - Second number inputted by user.

	Return Value   : Sum of given two numbers.
	'''
    #Approach      : Use of recursion and myIncrement function.
    if number2 == 0:
        return number1
    else:
        return mySum(myIncrement(number1), pred.predecessor(number2))

示例#3

def myMul(number1,number2):
	'''
	Objective		: To multiply two given numbers.
	Input Variabes :
	       number1 : integer - First number inputted by user.
	       number2 : integer - Second number inputted by user.

	Return Value   : Product of given two numbers.
	'''
	#Approach      : Use of recursion, myIncrement and mySum function.
	
	if number1 == 0 or number2 ==0:
		return 0
	elif number2==1:
		return number1
	else:
		return mySum(number1,myMul(number1,pred.predecessor(number2)))