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java problem

 
peterx peter
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Posts: 19
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Hi!
A parking charge is 2 dollor for up to three houres. After 3 houres the charge increase with 0.5$ every houre.
if a person parks his car 5.3 houres.
He must pay 2$ for first 3 houres and 1.5 dollor for every houre 2+1.5=3.5$

because for 2 hourse we pay 1$ and for 0,3 houre we should pay 0.5 dollor more.



the above codes result is:
2+(0.5*(5.3-3))=3.15$
but it must be 3.5$
because for 2 houres 1$ and for 0.3 houre 0.5$ dollor more.
 
Henry Wong
author
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You need to round the number of hours up to the next half hour first.

If you already know this, (this was not clear in your question), and just want a suggestion on how to do it. I guess one trick is to double the value, round it up to the nearest whole number with the Math class, and half it back.

Henry
 
Jerry Olsson
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You can round up the last hour. Round up 0.3 to 1 with Math.ceil();

charge=2+(0.5*(Math.ceil(houre-3)));
 
Thomas Bigbee
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Sounds like a homework question to me.
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
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