constinitialization.cpp

ThinkingC++中文版

//: C08:ConstInitialization.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// Initializing const in classes
#include <iostream>
using namespace std;

class Fred {
  const int size;	 //const data member 常量类数据成员
public:
  Fred(int sz);		//one parameter	constructor
  void print();
};


//The special initialization point is called the constructor initializer list
//the initialization in the list occurs before any of the main constructor code is executed. 
//This is the place to put all const initializations

Fred::Fred(int sz) : size(sz)  
{
}

void Fred::print() 
{ 
	cout << size << endl; 
}

void main() {
  Fred a(1), b(2), c(3);
  a.print();
  b.print();
  c.print();
} ///:~