Question

This is what I’ve done for checking the divisibility of a number by 2*M_PI. “w” is a constant that’s 2/3 and t is the variable that varies by t += dt, where dt is 0.1. I’m trying to use the mod operator, %, to see if something is divisible. But its not working.

bool divisible;
real w = 2/3;
real t;

if((w*t) % 2*M_PI == 0)
    {
        divisible = true;
    }

else
    {
        divisible = false;
    }

This is the error that I get, “invalid operands of types ‘real’ and ‘int’ to binary ‘operator%’”

What does this mean? How do I get this to work? So do I need to make w and t an int? They can’t be because w is 2/3, and t increments from 0 by 0.1. Can someone please help me?

Answer 1

Use std::fmod instead, it operates on doubles rather than the integral % operator.