Question

I might sound incredible what I’m experiencing right now but I have this code along another operations.

double mues1 = 0;
mues1 = (Math.pow((ab/100),2)*tam);

Where ab=4, tam=400.

This should give .64, but the variable keeps being 0.0, and it only changes it’s value if the operation is bigger than 1.

If I replace the math.pow with ^2, the variable becomes 800.0 no matter which value has ‘ab’.

Just to make clear, I’m debugging the code so I know how the value is.

I have restarted eclipse and my computer and it didn’t help.

Answer 1

The problem is that the variable ab is an integer and you are performing integer division.

According to integer division, 4/100 = 0. To get the result 0.04, declare ab as a double.

FYI, the caret character in Java performs a bitwise xor, so you probably don’t want to use that.