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I am making a mobile application of orders for android in Delphi XE6, in this application I make a discount calculation, which divides the amount of Discount given by 100 less the total value, but the price value is already coming brittle from the database of ex customer : 11,568.
I wanted to know how do I top up this value?!?! ; I found examples using 'round' but it rounds the values more.
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Never never never never use a float to treat monetary values.
They do not keep values accurately that one expects of money, it is well expected that after some calculations sum up a penny or two. The correct is to store the total number of cents as an integer. So R$5.00 turns 500 and R$19,90 turns 1990. Keeping these values always as integers, throughout any calculation you do, you will not need to round or there will be problems of accuracy.
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The Round accepts two parameters. The second is the number of decimal places you want in the result.
For example, if you do:
Round(11.568, 2);
Will get 11.57 (or 11.57 when on display in Brazilian culture).
The ideal type to work with monetary values in Delphi, Interfacing, is the Currency.
yes the round for Delphi admits two parameters, but for firemonkey mobile it accepts only one !!! ; I will try to use Currency, vlw thanks !
@Paul See if the Roundto is available. Would look like this: RoundTo(11.568, -2) (minus two in the second parameter).
The Roundto is not this, only the round is available for mobile, Thanks again !
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I agree with Guilherme Bernal, if you need a higher value use
int64for the presentation to the end user divided by 100 and use the functionFormatFloat.– Jeo Master