23 lines
510 B
C++
23 lines
510 B
C++
/* File : example.h */
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#include <iostream>
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class Callback {
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public:
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virtual ~Callback() { std::cout << "Callback::~Callback()" << std:: endl; }
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virtual void run() { std::cout << "Callback::run()" << std::endl; }
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};
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class Caller {
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private:
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Callback *_callback;
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public:
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Caller(): _callback(0) {}
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~Caller() { delCallback(); }
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void delCallback() { delete _callback; _callback = 0; }
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void setCallback(Callback *cb) { delCallback(); _callback = cb; }
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void call() { if (_callback) _callback->run(); }
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};
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