home *** CD-ROM | disk | FTP | other *** search
- //: C11:Pmem2.cpp
- // From Thinking in C++, 2nd Edition
- // Available at http://www.BruceEckel.com
- // (c) Bruce Eckel 1999
- // Copyright notice in Copyright.txt
- // Pointers to members
- #include <iostream>
- using namespace std;
-
- class Widget {
- void f(int) const {cout << "Widget::f()\n";}
- void g(int) const {cout << "Widget::g()\n";}
- void h(int) const {cout << "Widget::h()\n";}
- void i(int) const {cout << "Widget::i()\n";}
- static const int _count = 4;
- void (Widget::*fptr[_count])(int) const;
- public:
- Widget() {
- fptr[0] = &Widget::f; // Full spec required
- fptr[1] = &Widget::g;
- fptr[2] = &Widget::h;
- fptr[3] = &Widget::i;
- }
- void select(int i, int j) {
- if(i < 0 || i >= _count) return;
- (this->*fptr[i])(j);
- }
- int count() { return _count; }
- };
-
- int main() {
- Widget w;
- for(int i = 0; i < w.count(); i++)
- w.select(i, 47);
- } ///:~
-