C / C++ / MFC

int size = atoi( argv[1] );

#include <iostream>

using namespace std;

class cls 
{
	private:
		int arr[len];
		
	public:
		int len;
		void print_arr();
};

int main(int argc, char *argv[])
{
	cls obj;
	obj.len = atoi( argv[1] );
	obj.print_arr();
	
	return 0;
}

void cls::print_arr()
{
	for (int i = 0; i < len; i++)
	{
		arr[i] = i;
		cout << arr[i] << " ";
	}
}

class cls 
{
private:
    int * m_array;
		
public:
    int m_length;

    cls( int length );   // constructor
    ~cls();              // destructor
    void print_array();
};

cls::cls( int length )   // constructor
{
   m_length = length;
   m_array = new int[length];
}

cls::~cls()              // destructor
{
   delete [] m_array;
   m_array = nullptr;
}

int main(int argc, char *argv[])
{
    int length = atoi( argv[1] );
    cls obj( length );
    obj.print_array();
    return 0;
}

CSize mycsize = gprdc->GetTextExtent(_T("0123456789ABCDEF"), 16);
   mycsize.cx = mycsize.cx / 16;
   RECT gprrect, gprrect1, accessrect;
 
   WINDOWINFO dlgwin;
   GetWindowInfo(&dlgwin);
   asidgprs.GetWindowRect(&gprrect);
    asidaccess.GetWindowRect(&accessrect);
   int height = gprrect.bottom - gprrect.top;
    gprrect.left = (gprrect.left - dlgwin.rcWindow.left) + dlgwin.cxWindowBorders;
    accessrect.left = (accessrect.left - dlgwin.rcWindow.left) + dlgwin.cxWindowBorders;
    gprrect.top = gprrect.top -  ( dlgwin.rcWindow.top + dlgwin.cyWindowBorders + 20) ;
    accessrect.top = accessrect.top - ( dlgwin.rcWindow.top + dlgwin.cyWindowBorders + 20);
    gprrect.bottom = ( gprrect.top + height) -20 ;
    accessrect.bottom = (accessrect.top + height) - 20;
   gprrect.right = gprrect.left + (mycsize.cx * 10);
   accessrect.right = accessrect.left + (mycsize.cx * 10);

ForNow wrote:

I wanted to calculate the number of characters the control can hold on a line

class MyCustomEdit : public CEdit
{
}