72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
// Build don't link:
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// GROUPS passed visibility
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// visibility file
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// From: Gordon Joly <G.Joly@cs.ucl.ac.uk>
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// Date: Wed, 21 Apr 93 09:42:07 +0100
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// Subject: /*** BUG REPORT : THE MYTH OF PRIVATE INHERITANCE ***/
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// Message-ID: <9304210842.AA01815@life.ai.mit.edu>
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#include <iostream.h>
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class A {
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private:
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int number;
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public:
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A(int i) : number(i)
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{}
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virtual ~A()
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{}
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virtual void Number(int c)
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{ number = c; } // ERROR - private
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virtual int Number()
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{ return number; } // ERROR - private
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};
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class B : private A {
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private:
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int second_number;
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public:
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B(int c, int i) : second_number(c), A(i)
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{}
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virtual ~B()
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{}
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virtual void firstNumber(int b) // renames member function Number(int) of class A
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{ A::Number(b); }
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virtual int firstNumber() // renames member function Number() of class A
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{ return A::Number(); }
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};
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class C {
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private:
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B* bobject;
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public:
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C(B* bp) : bobject(bp)
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{}
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virtual ~C()
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{}
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//
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// the following two functions access
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// private member functions of class B
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// and they should not be able to do so
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//
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virtual void setBValue(int i)
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{ if (bobject) bobject->Number(i); }// ERROR - .*
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virtual int getBValue()
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{ if (bobject) { return bobject->Number(); } return 0; }// ERROR - .*
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};
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int main()
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{
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B* bobject = new B(2, 1);
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C* cobject = new C(bobject);
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cobject->setBValue(8);
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cout << cobject->getBValue() << endl;
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delete bobject;
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delete cobject;
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}
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