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I use voids in my programes.. like this:

void something () {content}

but when i see it in other people's code i see:

void something (int x, int y,...) {}

What does that do? and why is there "()" at the end of some commands in the first place?

"()" denotes a function call. Inside the parenthesis can lie parameters with which you pass variables/values to the function that you are calling.



http://cplusplus.com/doc/tutorial/functions/
http://cplusplus.com/doc/tutorial/functions2/

Thank you

Do you mean void or the parentheses? If you mean the parentheses, then its a function call, or you can use it to separate expressions so order of operations doesn't change the way you want it to evaluate. I.E. if you had the expression 5 + 6 * 2 + 4, order of operations would make it 5 + 12 + 4 and mess it up (unless you want it do it like that). Using parentheses would make them separate: (5 + 6) * (2 + 4) and it would come out as 66, the way you would expect. If you mean void, that's the type of variable the function returns. Void denotes no value is returned. If you wanted an int to be returned from the function, you'd use int, and if you wanted a double, you'd put double before the function etc. In case you don't know, you'd use the return command and put the number (or expression) you want to return. You can also use this command with no value to break from the function (don't take that as gospel, but I'm pretty sure).