calling a function inside main()

I am having more troubles in my future reference program...
I have this function:

Code:

char User_Choice;
	void userDecision(char User_Choice) {
	std::cout << "Do you like the number 3? Yes=Y, No=N" << endl;
	std::cin >> User_Choice;
	if (User_Choice == 'y') {
		std::cout << "You are cool." << endl;
	}
	else if (User_Choice == 'n'){
		std::cout << "You suck!" << endl;
	}
	else if (User_Choice != 'y' && User_Choice != 'n'){
		std::cout << "Invalid Decision" << endl;
	}

	}

And I need to invoke/call it inside the function main().
I am trying to do it like this:

Code:

userDecision(char User_Decision);

But it's not working...any help?

I think I see what you are doing but it is kindof hard without the complete code.

Why don't you have a look at this tutorial on functions and see if that clears up your problems.

No, that really didn't help me much...
I just need to know how to use a function inside of main().

The error i am getting is this: "function does not take zero arguments."

Ok, I got it to work...the argument I put in the function had no point, therefore it was invalid.

That means that you are calling a function that takes 1 or more parameters, but you are giving it none. If you can't spot the error yourself, then post more code and we'll find it for you.

EDIT
k, nvr mind

if you send your full program we could help you more .

Code:

void userDecision(char User_Choice)

it means userdecision takes a char when it is called .
for calling the function you have written :

Code:

userDecision(char User_Decision);

(there is no need to write the type ( char ) before arguman name )

what is user_decision ?
if it is user_choice then why you read it in function userdecision again ?
I think you want to read user_choice in main and send it to ur function for doing this :

in main ->

Code:

    std::cout << "Do you like the number 3? Yes=Y, No=N" << endl;
    std::cin >> User_Choice;
    userDecision(User_choice);

and your function be ->

Code:

void userDecision(char User_Choice) {
     if (User_Choice == 'y') {
        std::cout << "You are cool." << endl;
    }
    else if (User_Choice == 'n'){
        std::cout << "You suck!" << endl;
    }
    else if (User_Choice != 'y' && User_Choice != 'n'){
        std::cout << "Invalid Decision" << endl;
    }

    }

hope it helps