79 lines
1.5 KiB
C++
79 lines
1.5 KiB
C++
// memb_pt.cpp -- dereferencing pointers to class members
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#include <iostream>
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using namespace std;
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class Example
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{
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private:
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int feet;
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int inches;
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public:
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Example();
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Example(int ft);
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~Example();
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void show_in() const;
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void show_ft() const;
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void use_ptr() const;
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};
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Example::Example()
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{
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feet = 0;
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inches = 0;
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}
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Example::Example(int ft)
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{
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feet = ft;
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inches = 12 * feet;
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}
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Example::~Example()
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{
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}
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void Example::show_in() const
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{
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cout << inches << " inches\n";
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}
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void Example::show_ft() const
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{
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cout << feet << " feet\n";
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}
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void Example::use_ptr() const
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{
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Example yard(3);
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int Example::*pt;
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pt = &Example::inches;
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cout << "Set pt to &Example::inches:\n";
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cout << "this->pt: " << this->*pt << endl;
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cout << "yard.*pt: " << yard.*pt << endl;
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pt = &Example::feet;
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cout << "Set pt to &Example::feet:\n";
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cout << "this->pt: " << this->*pt << endl;
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cout << "yard.*pt: " << yard.*pt << endl;
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void (Example::*pf)() const;
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pf = &Example::show_in;
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cout << "Set pf to &Example::show_in:\n";
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cout << "Using (this->*pf)(): ";
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(this->*pf)();
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cout << "Using (yard.*pf)(): ";
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(yard.*pf)();
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}
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int main()
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{
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Example car(15);
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Example van(20);
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Example garage;
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cout << "car.use_ptr() output:\n";
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car.use_ptr();
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cout << "\nvan.use_ptr() output:\n";
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van.use_ptr();
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cin.get();
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return 0;
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}
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