Pawn Problem with percentage

GospodinX · 2020-12-22, 10:32 AM

Hi guys

I use percentage for many things in my SA-MP server.(discounts,tax etc),but I have some problems with it.

For "small" numbers it work pretty nice.

Code:

Code:
new result = PERCENT*PRICE/100;

printf("Result: %d",result);

First test:
PERCENT: 75
PRICE: 140 000 000
Result: 19100654

Result is ok

Second test:
PERCENT: 75
PRICE: 340 000 000
Result: -17698038

Result is wrong

Does anyone have idea how I should fix it?

Pinch · 2020-12-22, 11:36 AM

Because -2³¹-1 is the max value a single variable can store and as soon as you can try to go beyond that value, it overflows and starts going backwards...

Try price * 0.percentage

Ex: 340 000 000 * 0.75

GospodinX · 2020-12-22, 10:45 PM

(2020-12-22, 11:36 AM)Pinch Wrote: Because -2³¹-1 is the max value a single variable can store and as soon as you can try to go beyond that value, it overflows and starts going backwards...

Try price * 0.percentage

Ex: 340 000 000 * 0.75

Hm ?

Pinch · 2020-12-23, 10:54 AM

My bad, price - (price * 0.75)