im trying to get ready for my test tommorow. And well giong over my old labs....I came to this..
I have these to function defs....

Code:
void CharSet::Add(char Value)
{
   Contents[Value - 'A'] = true; 
}
void CharSet::Remove(char Value)
{
   Contents[Value - 'A'] = false;
And Although I used it I never fully understood....the Value -'A'...I was wondering if someone could help me out and give me an explanation into how it is used....I really don't recall using that or being taught that. I used it because the teacher in his instructions hinted for us to use it.
thanks in advance