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SFUNC.CPP
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C/C++ Source or Header
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1995-02-23
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66 lines
// File from page 353 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).
//////////////////////////////////////////////////
//: SFUNC.CPP -- Static member functions
class X {
int i;
static int j;
public:
X(int I = 0) : i(I) {
// Non-static member function can access
// Static member function or data:
j = i;
}
int val() const { return i; }
static int incr() {
//! i++; // Error: static member function
// Cannot access non-static member data
return ++j;
}
static int f() {
//! val(); // Error: static member function
// Cannot access non-static member function
return incr(); // OK -- calls static
}
};
int X::j = 0;
main() {
X x;
X* xp = &x;
x.f();
xp->f();
X::f(); // Only works with static members
}