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brad sue · Oct 23rd, 2006, 5:19 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, 5:19 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.