38 lines
531 B
C++
38 lines
531 B
C++
#include <iostream>
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using namespace std;
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class Observer
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{
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public:
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Observer(){}
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virtual ~Observer(){}
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virtual void update() = 0;
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};
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class BinaryObserver: public Observer
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{
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public:
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void update()
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{
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cout << "BinaryObserver update" << endl;
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}
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};
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class OctalObserver: public Observer
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{
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public:
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void update()
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{
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cout << "OctalObserver update" << endl;
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}
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};
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class HexaObserver: public Observer
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{
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public:
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void update()
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{
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cout << "HexaObserver update" << endl;
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}
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};
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