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Oct 16th, 2005, 6:54 AM
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#1 |
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Newbie
Join Date: Oct 2005
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help w/ vending machine - make sure coin inserted first?
hey,
ummm im having trouble programming a vendin machine bcoz even if you don't insert a coin, but still press the button, a product will come out does anyone noe how to make sure that the coin HAS to be inserted first? thanks  |
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Oct 16th, 2005, 7:02 AM
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#2 |
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Hobbyist Programmer
Join Date: Apr 2005
Posts: 218
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So what language is this vending machine written then, C, C++, VB, Java ect..., LOL
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Oct 16th, 2005, 7:02 AM
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#3 |
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Expert Programmer
Join Date: Aug 2005
Location: Rotterdam, the Netherlands
Posts: 942
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well, when a coin is inserted, you raise a flag, let's say coin_inserted.. and the button only works when the flag is raised. Not that difficult.
Welcome to the forums, btw |
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Oct 16th, 2005, 7:09 AM
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#4 |
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Newbie
Join Date: Oct 2005
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hey,
i'm using a program called Microworlds - uses LOGO language... i think.... anywaiz, so how do i use flag? i really don't get it... |
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Oct 16th, 2005, 7:18 AM
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#5 |
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Expert Programmer
Join Date: Aug 2005
Location: Rotterdam, the Netherlands
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do you actually know the language
 by flag i mean just a variable.. when a coin is inserted, the variable will contain 1, otherwise zero. |
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Oct 16th, 2005, 7:24 AM
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#6 |
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Newbie
Join Date: Oct 2005
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ummmm so how would i actually type in the procedures
that if the variable is 1, then the product can be selected and if its 0 then ask the user to insert a coin? |
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Oct 16th, 2005, 7:35 AM
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#7 |
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Expert Programmer
Join Date: Aug 2005
Location: Rotterdam, the Netherlands
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exactly
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Oct 16th, 2005, 7:43 AM
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#8 |
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Newbie
Join Date: Oct 2005
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kul!
 thanks |
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Oct 16th, 2005, 11:09 AM
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#9 | |
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Expert Programmer
Join Date: May 2005
Location: East Lansing, MI
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Quote:
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Oct 16th, 2005, 11:46 AM
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#10 |
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Resident Grouch
 
Join Date: Jun 2005
Posts: 6,453
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If the flag doesn't work for you, try tipping it over to the side and shaking it.
__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers |
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