Java / Pawn Maths公式返回0

Question

could someone explain me what am I doing wrong here, and how can I make this formula to be working? right now it returns 0 in Java and Pawn. But it works in PHP, which isnt making much sense for me.

int test = (65 / 65 / (1 + 25) * 10000);

Answer 1

In Java, integer division will truncate the results. For example, 5/2 will truncate 2.5 to 2 .

To ensure you're using float with numeric constants, add a .0 on the end, as in:

int test = (65.0 / 65.0 / (1.0 + 25.0) * 10000.0);

Answer 2

Java operations for multiplication and division is left to right, so your expression is really:

(((65 / 65) / 26) * 1000)  // Clarifying parenthesis
((1 / 26) * 1000)          
(0 * 1000)                 // integer division!
0

To avoid this, you just need to ensure the operations are casted to a double.

The simple way would be just changing the first value to a double, either by:

int test = (65D / 65 / (1 + 25) * 10000);

Or

int test = (65.0 / 65 / (1 + 25) * 10000);

However, if you are refactoring your code later, you might want to change more than just the first value.