Is there a way to check if a variable is a whole number? C++

Question

I need to check if a variable is a whole number, say I have the code:

double foobar = 3;
//Pseudocode
if (foobar == whole)
    cout << \"It\'s whole\";         


        

Answer 1

just write a function or expression to Check for whole number, returning bool.

in usual definition i think whole number is greater than 0 with no decimal part.

then,

if (abs(floor(foobar) )== foobar)
    cout << "It's whole";
else
    cout << "Not whole";