Writing Function Definitions (Checking Correctness)

[G3PO]

Just a few short questions. I'm writing two function definitions, but I'm not quite clear as to what that means. The first one is writing a function definition called even that takes one argument (as an int) and returns a bool value. The fiction returns true if one argument is an even number, otherwise it returns false.

The second is a function for isDigit that takes an argument (as a char) and returns a bool value. It returns true if the argument is a decimal digit, and false if not.

What does it mean by a function definition? How do I go about writing these? Thanks for any help.

[G3PO]

What I ended up with the first one is:

bool even(int num){
    if(num % 2 == 0){
         return true;
    }
    else{
         return false;
    }
}

Does this make sense?

[G3PO]

My answer for the second is:

bool isDigit(char num)
{
    if(floor(num) != num){
         return true;
    }
    else{
         return false;
    }
}

Sound right?

[LB]

You don't need the excessive if/else in this case - for instance, with the first one, you can simply
return num % 2 == 0;, and similar for the second.

Your solution to the second one doesn't seem right - floor will convert floats/doubles to integers by chopping off the decimal place. I think you mean to compare if the character is between the character values '0' and '9'.

[Chervil]

How about you test these with actual data. Did you do that already?