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Creating Tip Calculator Program

 

Creating Tip Calculator Program
brianmen

14 Jun, 2009 - 10:05 AM
Post #1

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Hi all. I started learning Python yesterday. I really like it, but I've run into a problem. I'm making a tip calculator program, but cannot seem to get it to work with decimal point numbers such as 12.55, 4.66, ect. Whole numbers such as 12, 55, 34 seem to work fine. Would you help me fix this please and tell me what I should have put in or did wrong? Thanks

CODE
### Restaurant Tipper Program
### Calculates total amount of bill including a 15% tip
print "Hello there!" \
      " This program calculates total amount" \
      " of bill you need to pay including a 15% tip" \
      " So please enter your total bill amount and I will" \
      " give you your total bill."
raw_bill= raw_input("Bill Total Amount: ")
float(raw_bill)
raw_bill= int(raw_bill)
raw_bill= 0.00+raw_bill
x=raw_bill
float(x)
tip_amt= x*.15
tip_amt=int(tip_amt)
print "Your tip for the inputted bill is", tip_amt, "dollars."
total_bill=raw_bill + tip_amt
total_bill= int(total_bill)
print "Your total bill, including the tip of", tip_amt, " dollars is", \
      total_bill, \
      "dollars."
raw_input("Press enter key to exit")
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xZachtmx

RE: Creating Tip Calculator Program

14 Jun, 2009 - 03:53 PM
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well... it seems like you want the end result to be a full number like $45 instead of $44.8

so this chunk of code in the beginning
CODE

float(raw_bill)
raw_bill= int(raw_bill)
raw_bill= 0.00+raw_bill


is where your problem is happening.

The first line i posted up there is kinda useless...
and if you want it to be a float... then why in the second line do you make it into an integer?
and the third line dosent make much sense either..

I just did this... the end result is an integer... but you can fix that preety easily. The reason it wasnt working is because of the three lines above...
but here is something that works. if you need anymore help just ask. This is a preety easy script to tinker with:

CODE


### Restaurant Tipper Program
### Calculates total amount of bill including a 15% tip
print "Hello there!" \
      " This program calculates total amount" \
      " of bill you need to pay including a 15% tip" \
      " So please enter your total bill amount and I will" \
      " give you your total bill."
raw_bill= raw_input("Bill Total Amount: ")
x = float(raw_bill)
tip_amt= x*.15
tip_amt=int(tip_amt)
print "Your tip for the inputted bill is", tip_amt, "dollars."
total_bill= x + tip_amt
total_bill= int(total_bill)
print "Your total bill, including the tip of", tip_amt, " dollars is", \
      total_bill, \
      "dollars."
raw_input("Press enter key to exit")


i hope i helped you a bit.

This post has been edited by xZachtmx: 14 Jun, 2009 - 03:54 PM
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brianmen

RE: Creating Tip Calculator Program

14 Jun, 2009 - 05:56 PM
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Hey, thanks a bunch for your help. Those three junk lines you pointed out were my attempt to get a decimal number to come out. What I want the program to do is take a value, say $19.78, multiply it by .15, then add those two values together (19.78+2.967) to get a grand total of 22.74. The program we were left with "works", but it rounds the tip down to $2.00 as opposed to the correct value of $2.78. Is there a way for me to get that fixed? Once again, thank you for your help!!!
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shadhin

RE: Creating Tip Calculator Program

15 Jun, 2009 - 12:58 AM
Post #4

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You need to use float instead of int. Take a look at the revised code-
CODE

### Restaurant Tipper Program
### Calculates total amount of bill including a 15% tip
print '''Hello there!
         This program calculates total amount
         of bill you need to pay including a 15% tip
         So please enter your total bill amount and I will
         give you your total bill.\n'''
raw_bill= raw_input("Bill Total Amount: ")
x = float(raw_bill)
tip_amt= x*.15
tip_amt=float(tip_amt)
print "Your tip for the inputted bill is", tip_amt, "dollars."
total_bill= x + tip_amt
total_bill= float(total_bill)
print "Your total bill, including the tip of", tip_amt, " dollars is", \
      total_bill, \
      "dollars."
raw_input("Press enter key to exit")
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