how to declare pointer for this? thanks

jcylam (104)
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// Get screen resolution
	long Screen_Res_X = GetSystemMetrics ( SM_CXSCREEN );		//Screen size in x-axis
	long Screen_Res_Y = GetSystemMetrics ( SM_CYSCREEN );		//Screen size in y-axis

	cout << "Screen size x-axis: " << Screen_Res_X << endl;		//Prints x-axis size
	cout << "Screen size y-axis: " << Screen_Res_Y << endl;		//Prints y-axis size
	
	long GT_X = Screen_Res_X/2;		//Declare Gaze Tracker X coordinate
	long GT_Y = Screen_Res_Y/2;		//Declare Gaze Tracker Y coordinate

		cout << "Press \"ESC\" to end program\n";
//Declare pointers
	long *pGT_X = GT_X;
	long *pGT_Y = GT_Y;
	long *pScreen_Res_X = Screen_Res_X;
	long *pScreen_Res_Y = Screen_Res_Y;
Disch (13742)
You assign an address to a pointer:

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int foo;  // foo is the int... &foo is the address of the int

int* ptr = &foo;  // <-- notice the &
jcylam (104)
so like this??
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// Get screen resolution
	long Screen_Res_X = GetSystemMetrics ( SM_CXSCREEN );		//Screen size in x-axis
	long Screen_Res_Y = GetSystemMetrics ( SM_CYSCREEN );		//Screen size in y-axis

	cout << "Screen size x-axis: " << Screen_Res_X << endl;		//Prints x-axis size
	cout << "Screen size y-axis: " << Screen_Res_Y << endl;		//Prints y-axis size
	
	long GT_X = Screen_Res_X/2;		//Declare Gaze Tracker X coordinate
	long GT_Y = Screen_Res_Y/2;		//Declare Gaze Tracker Y coordinate

//Declare pointers
	long *pGT_X;
	long *pGT_Y;
	long *pScreen_Res_X;
	long *pScreen_Res_Y;

//Assign pointers
	pGT_X = &aGT_X;
	pGT_Y = &aGT_Y;
	pScreen_Res_X = &aScreen_Res_X;
	pScreen_Res_Y = &aScreen_Res_Y;
jcylam (104)
&aGT_X should be &GT_X

same as the other 3
NGen (689)
That is correct, but you can also assign your variables in their declarations rather than separately:

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//Declare and assign pointers
	long *pGT_X = &GT_X;
	long *pGT_Y = &GT_Y;
	long *pScreen_Res_X = &Screen_Res_X;
	long *pScreen_Res_Y = &Screen_Res_Y;


And there is also an edit button on your posts. Please make use of it.
jcylam (104)
thanks

oh short question i cant do this can i if (x < y < z) ?
jsmith (5804)
you can, but it doesn't do what you think it does/want it to.
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