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The CICA Windows Explosion!
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The CICA Windows Explosion! - Disc 2.iso
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9
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PMEM2.CPP
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1995-02-23
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62 lines
// File from page 394 in "Thinking in C++" by Bruce Eckel
//////////////////////////////////////////////////
// From the compressed package ECKELT01.ZIP 2/21/95
// Copyright (c) Bruce Eckel, 1995
// Source code file from the book "Thinking in C++",
// Prentice Hall, 1995, ISBN: 0-13-917709-4
// All rights reserved EXCEPT as allowed by the following
// statements: You may freely use this file for your own
// work, including modifications and distribution in
// executable form only. You may copy and distribute this
// file, as long as it is only distributed in the complete
// (compressed) package with the other files from this
// book and you do not remove this copyright and notice.
// You may not distribute modified versions of the source
// code in this package. This package may be freely placed
// on bulletin boards, internet nodes, shareware disks and
// product vendor disks. You may not use this file in
// printed media without the express permission of the
// author. Bruce Eckel makes no
// representation about the suitability of this software
// for any purpose. It is provided "as is" without express
// or implied warranty of any kind. The entire risk as to
// the quality and performance of the software is with
// you. Should the software prove defective, you assume
// the cost of all necessary servicing, repair, or
// correction.
// If you think you've found an error, please
// email all modified files with loudly commented changes
// to: eckel@aol.com (please use the same
// address for non-code errors found in the book).
//////////////////////////////////////////////////
//: PMEM2.CPP -- Pointers to members
#include <iostream.h>
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";}
enum { 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; }
};
main() {
widget w;
for(int i = 0; i < w.Count(); i++)
w.select(i, 47);
}