java problem

[peterx peter]

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.

charge=2+(0.5*(houre-3))
return charge

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]

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]

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]

Sounds like a homework question to me.