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// Fig. 7.12: fig07_12.cpp
// Non-friend/non-member functions cannot access
// private data of a class.
#include <iostream>
using std::cout;
using std::endl;
// Count class definition
class Count {
public:
// constructor
Count()
: x( 0 ) // initialize x to 0
{
// empty body
} // end constructor Count
// output x
void print() const
{
cout << x << endl;
} // end function print
private:
int x; // data member
}; // end class Count
// function tries to modify private data of Count,
// but cannot because function is not a friend of Count
void cannotSetX( Count &c, int val )
{
c.x = val; // ERROR: cannot access private member in Count
} // end function cannotSetX
int main()
{
Count counter; // create Count object
cannotSetX( counter, 3 ); // cannotSetX is not a friend
return 0;
} // end main
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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