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Help => Window => Topic started by: Eragon0605 on June 14, 2010, 01:00:16 am

Title: error: expected primary-expression before '.' token
Post by: Eragon0605 on June 14, 2010, 01:00:16 am

Alright, so I'm making a tic-tac-toe game. I want to make it so that if the user clicks the upper left-hand corner of the screen, a 'X' appears. I am trying to use the following code:

Code: [Select]

while (App.GetEvent(Event))
        {
            unsigned int MouseX = Input.GetMouseX(); // Error 1
            unsigned int MouseY = Input.GetMouseY(); // Error 2
            bool LeftButtonDown = Input.IsMouseButtonDown(sf::Mouse::Left); //Error 3

            if ((LeftButtonDown == true) && (MouseX << 50) && (MouseY << 50))
            {
                SprCross1.SetPosition(25.f, 25.f);
                X1 = 1;
            }
        }
When I try to compile I get three errors saying "error: expected primary-expression before '.' token". What is the problem? I am following the tutorial's example exactly. Oh, and yes, I did put "using sf::Input" at the beginning of the program. I am using GCC, Linux Ubuntu, and C++.

Title: error: expected primary-expression before '.' token
Post by: kitchen on June 14, 2010, 01:07:06 am

You'll need to put this outside of the loop somewhere:

Code: [Select]

const sf::Input& Input = App.GetInput();

Title: error: expected primary-expression before '.' token
Post by: Eragon0605 on June 14, 2010, 01:58:59 am

Ah, thanks! The compiler error is gone! Doesn't do what I want, but there's probably just some other messed-up piece of code somewhere...

EDIT: Found and corrected error. Was totally unrelated. Thanks kitchen for fixing yet another error. (It was still very much in the early development stage)

Title: error: expected primary-expression before '.' token
Post by: kitchen on June 14, 2010, 02:03:57 am

Quote from: "Eragon0605"

Ah, thanks! The compiler error is gone! Doesn't do what I want, but there's probably just some other messed-up piece of code somewhere...

The error is right here:

Code: [Select]

(MouseX << 50) && (MouseY << 50)

You think you are doing a less-than comparison when you are in fact doing a left shift by 50 bits on MouseX and MouseY. Change it to this:

Code: [Select]

(MouseX < 50) && (MouseY < 50)