Question

I want to implement greatest integer function. [The “greatest integer function” is a quite standard name for what is also known as the floor function.]

int x = 5/3;

My question is with greater numbers could there be a loss of precision as 5/3 would produce a double?

EDIT: Greatest integer function is integer less than or equal to X.
Example:

4.5 = 4
4 = 4
3.2 = 3
3 = 3

What I want to know is 5/3 going to produce a double? Because if so I will have loss of precision when converting to int.

Hope this makes sense.

Answer 1

You will lose the fractional portion of the quotient. So yes, with greater numbers you will have more relative precision, such as compared with 5000/3000.

However, 5 / 3 will return an integer, not a double. To force it to divide as double, typecast the dividend as static_cast<double>(5) / 3.