Programming Forums > Application Development > C++

brad sue · Oct 23rd, 2006, 6:19 PM

Hi,
I have a compiling error but I do not understand why:
I have 2 class Rectangle and Screen.
I have to code a function in class rectangle whose the prototype is:
void Rectangle::draw( Screen object)

Since the class Screen is the argument of the function, I set
friend class Screen in the public section of the class Rectangle.

(Toggle Plain Text)

void Rectangle::draw( Screen  object)
     {
          int x1=upLeft.getX();
          int y1=upLeft.getY();
          for(int i=x1;i<(x1+width);i++)
             for(int j=y1;j<(y1+height);j++)
                 object.pixels[x1][y1];//error 1 and 3

I have the following errors:
1-`object' has incomplete type
2-forward declaration of `struct Screen' // refer to line where I declared friend class Screen
3-invalid use of undefined type `struct Screen'

Please, can someone please tell me the problem?
B.

Oct 23rd, 2006, 6:19 PM	#1
brad sue Hobbyist Programmer Join Date: Mar 2006 Posts: 120 Rep Power: 3	compiling error Hi, I have a compiling error but I do not understand why: I have 2 class Rectangle and Screen. I have to code a function in class rectangle whose the prototype is: void Rectangle::draw( Screen object) Since the class Screen is the argument of the function, I set friend class Screen in the public section of the class Rectangle. (Toggle Plain Text) void Rectangle::draw( Screen object) { int x1=upLeft.getX(); int y1=upLeft.getY(); for(int i=x1;i<(x1+width);i++) for(int j=y1;j<(y1+height);j++) object.pixels[x1][y1];//error 1 and 3 void Rectangle::draw( Screen object) { int x1=upLeft.getX(); int y1=upLeft.getY(); for(int i=x1;i<(x1+width);i++) for(int j=y1;j<(y1+height);j++) object.pixels[x1][y1];//error 1 and 3 I have the following errors: 1-`object' has incomplete type 2-forward declaration of `struct Screen' // refer to line where I declared friend class Screen 3-invalid use of undefined type `struct Screen' Please, can someone please tell me the problem? B.

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)