Thank you so muchh!!! Yea, that fixed the problem
, It'll help me a lot in the future too 
Oh, ok , Sorry, I never knew that lol, my first post on the website, ill try to do it next time
Computer Science Canada Variable has no value!? |
| Author: | tristanbryce7 [ Wed Oct 10, 2012 3:57 pm ] |
| Post subject: | Variable has no value!? |
Hey guys, I have a problem in Turing, I'm new to Turing and just started learning it so yeah. So I made a program that is like a menu, and you have 5 options, and you enter a number for the item you want, and than it asks u how many u want of that , and than calculates the cost. This is the code for it __________________________________________________________________ var food : string (1) var burgeramount : real var popamount : real var friesamount : real var applepieamount : real var milkshakeamount : real var Cost : real loop put "Hello, Please place your order from the following options" put "1. Burger = $2.50" put "2. Pop = $1.50" put "3. Fries = $1.60" put "4. Apple Pie = $2.70" put "5. Milkshake = $3.15" put "6. Done food Selection" put "" put "Put Item Number Over Here ==>" .. getch (food) case food of label "1" : put "How many burgers would you like?" get burgeramount cls label "2" : put "How much pop would you like?" get popamount cls label "3" : put "How many packs of fries would you like?" get friesamount cls label "4" : put "How many Apple Pie would you like?" get applepieamount cls label "5" : put "How many milkshakes would you like?" get milkshakeamount cls label "6" : cls Cost := (2.5 * burgeramount) + (1.5 * popamount) + (1.6 * friesamount) + (2.7 * applepieamount) + (1.5 * milkshakeamount) put "The Bill is $", Cost, " !" label : put "Please put a number from 1-6" delay (1500) cls end case end loop _____________________________________________________________________ So my problem is , if the person running the program doesnt select all 5 of the items in his selection, it says "variable has no value" . WHich i get, it means since person didn't enter anything for say burger, it wont have anything , so my question is, how do i change the code so that if they dont choose, say, pop and burger, but the other items, the program calculates the cost fine and theres no problem, so how would i change to code to do that ? |
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| Author: | mirhagk [ Wed Oct 10, 2012 4:10 pm ] | ||||
| Post subject: | RE:Variable has no value!? | ||||
Change
to
So that they equal 0 by default. That should fix your problem. You need a starting value if you're going to ever use it without it being 100% defined beforehand. EDIT: For future reference you can use [syntax="turing"] your code here [ / syntax] (but without the spaces) to have the forum use syntax highlighting and put it in a nice code block (like above) |
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| Author: | tristanbryce7 [ Wed Oct 10, 2012 4:14 pm ] |
| Post subject: | Re: Variable has no value!? |
Thank you so muchh!!! Yea, that fixed the problem , It'll help me a lot in the future too
Oh, ok , Sorry, I never knew that lol, my first post on the website, ill try to do it next time |
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| Author: | mirhagk [ Wed Oct 10, 2012 7:41 pm ] |
| Post subject: | RE:Variable has no value!? |
No problem, welcome to the site. So long as you keep that in mind for your next post we're happy to help. The code tags will get you help faster because people can look over it quickly and see mistakes. Many people actually skip a question that doesn't have code tags, but I for one look to see if the person is within their first few posts, and will try to help out regardless. Anyways, if you ever need help just come here, it's a great place to get help, to discuss topics once you get advanced enough and to just converse and ask about university and stuff. Welcome. |
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| Author: | tristanbryce7 [ Thu Oct 11, 2012 3:55 pm ] |
| Post subject: | Re: Variable has no value!? |
Thanks , it means a lot lol , yea, once i get into advanced languaging, i could try and converse with the people who know what theyre doing  |
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