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Hi, I am currently making a calculator program in python, and im running into a few bugs at the moment.. first of all, my subtraction and addition functions wont work.
secondly I havent found a good way to return to the start, when a user enters wrong values in the enter value section.
 one year ago
 one year ago
Hi, I am currently making a calculator program in python, and im running into a few bugs at the moment.. first of all, my subtraction and addition functions wont work. secondly I havent found a good way to return to the start, when a user enters wrong values in the enter value section.
 one year ago
 one year ago

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jungleboobooBest ResponseYou've already chosen the best response.0
def convertstring(str): try: returnValue = int(str) except ValueError: returnValue = float(str) return returnValue def addition( a, b): return converstring(a) + convertstring(b) def subtraction(a, b): return convertstring(a)  convertstring(b) def multiplication(a, b): return convertstring(a) * convertstring(b) def division(a, b): return convertstring(a) / convertstring(b) keepProgramRunning = True print 'Welcome to the Calculator Program!' while keepProgramRunning: print "Please choose what you'd like to do" print "0: Addition" print "1: Subtraction" print "2: Multiplication" print "3: Division" print "4: Quit Program" #Capture the menu choice. choice = int(raw_input()) if choice == 0: try: numberA = raw_input("Enter your first number") numberB = raw_input("Enter your second number") print 'Your result is: ' print addition(numberA, numberB) except NameError: print 'wrong value entered' elif choice == 1: numberA = raw_input("Enter your first number") numberB = raw_input("Enter your second number") print 'Your result is: ' print subtraction(numberA, NumberB) elif choice == 2: numberA = raw_input("Enter your first number") numberB = raw_input("Enter your second number") print 'Your result is: ' print multiplication(numberA, numberB) elif choice == 3: numberA = raw_input("Enter your first number") numberB = raw_input("Enter your second number") print 'Your result is: ' print division(numberA, numberB) elif choice == 4: print 'Thank you for using the calculator program' keepProgramRunning = False else: print 'please choose a valid option' print '/n'
 one year ago

jungleboobooBest ResponseYou've already chosen the best response.0
as you can see, I have made an attempt in the addition part
 one year ago

carlsmithBest ResponseYou've already chosen the best response.1
How about... def convert_string(string): try: return int(string) except ValueError: pass try: return float(string) except ValueError: pass # will return None here automatically def valid_choice(string): try: if int(string) in range(2): # would be range(5) in your case return int(string) except: pass # will return None here automatically def addition(n0, n1): return n0 + n1 def subtraction(n0, n1): return n0  n1 funcs = [addition, subtraction] print """ 0: Addition 1: Subtraction """ choice = None while choice is None: choice = valid_choice( raw_input("Enter a number from the menu: ") ) n0 = convert_string( raw_input("Enter your first number: ") ) n1 = convert_string( raw_input("Enter your second number: ") ) if n0 is None or n1 is None: print 'Invalid input!!!' else: print "Your result is " print funcs[choice](n0, n1)
 one year ago

carlsmithBest ResponseYou've already chosen the best response.1
That last line calls functions from within a list, and could be written... func = funcs[choice] print func(n0, n1)
 one year ago

jungleboobooBest ResponseYou've already chosen the best response.0
alright, I've moderated the code, but I get stuck in this loop Please choose what you'd like to do 0: Addition 1: Subtraction 2: Multiplication 3: Division 4: Quit Program Please choose what you'd like to do 0: Addition 1: Subtraction 2: Multiplication 3: Division 4: Quit Program
 one year ago

jungleboobooBest ResponseYou've already chosen the best response.0
printing the menu over and over again
 one year ago

jungleboobooBest ResponseYou've already chosen the best response.0
this is the code: def convertstring(str): try: returnValue = int(str) except ValueError: pass try: returnValue = float(str) except ValueError: pass ##Will return none atomatically def valid_choice(str): try: if int(str) in range(5): return int(str) except: pass ##Also returns none def addition( a, b): return converstring(a) + convertstring(b) def subtraction(a, b): return convertstring(a)  convertstring(b) def multiplication(a, b): return convertstring(a) * convertstring(b) def division(a, b): return convertstring(a) / convertstring(b) funcs = [addition, subtraction, multiplication, division] keepProgramRunning = True print 'Welcome to the Calculator Program!' while keepProgramRunning: print "Please choose what you'd like to do" print "0: Addition" print "1: Subtraction" print "2: Multiplication" print "3: Division" print "4: Quit Program" #Capture the menu choice. choice = None while choice is None: choice = valid_choice(raw_input('enter a number from the menu: ')) numberA = raw_input("Enter your first number") numberB = raw_input("Enter your second number") if numberA is None or numberB is none: choice = valid_choice(raw_input('please choose a valid option from the menu')) else: print ' Your result is' print funcs[choice]
 one year ago

FertigBest ResponseYou've already chosen the best response.0
I think it's an indentation error... You have "while keepProgramRunning:" then the menu and the next line doesn't have the indentation anymore
 one year ago

FertigBest ResponseYou've already chosen the best response.0
*after "# Capture Menu choice"
 one year ago
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