Wrong calc on power?

[nagisml]

Hi

Looks like the calculator has issues with power and brackets.
50 - (2 ^ 5) - 5
13 is correct
50 - 2 ^ 5 - 5
254803963 is wrong should be also 13

Regards

[pwelter34]

I'm not sure this is wrong, if i paste 50 - 2 ^ 5 - 5 into c# interactive, i get 48. I paste it into google, it converts it to 50 - (2 ^ 5) - 5. I'll do some more research.

[nagisml]

Hi

Accoring to https://en.wikipedia.org/wiki/Order_of_operations the following order has to be applied:
exponents and roots
multiplication and division
addition and subtraction

It means that 50 - 2 ^ 5 - 5 has to be executed as 50 - (2 ^ 5) - 5.
Simular as 50 - 2 * 5 - 5 is a the same as 50 - (2 * 5) - 5

Regards

[hfellner]

@pwelter34 This is because in C# 50 - 2 ^5 - 5 means (50 - 2) XOR (5 - 5), which is 48. Also, this should be irrelevant, as a calculator should follow rules of mathematics, not programming languages anyway. Please fix this!

[sredna]

private static int Precedence(string c)
{
    if (c.Length == 1 && (c[0] == '^'))
        return 3;
 
    if (c.Length == 1 && (c[0] == '*' || c[0] == '/' || c[0] == '%'))
        return 2;
 
    return 1;
}

from https://lifeinhex.com/deobfuscating-autoit-scripts-part-2/

[cmza]

@pwelter34

While I might technically agree with @hfellner technical points, there are little things like politeness, and far better ways of asking someone to make changes in something they've made available for free, than he demonstrated.