fig09_04.cpp

是有关C++编程原理教程的例子程序,全,应该对大家有所帮助

// Fig. 9.4: fig09_04.cpp
// Demonstrating the class member access operators . and ->
#include <iostream>
using std::cout;
using std::endl;

// class Count definition
class Count 
{
public: // public data is dangerous
   // sets the value of private data member x
   void setX( int value )
   {
      x = value;
   } // end function setX

   // prints the value of private data member x
   void print() 
   { 
      cout << x << endl; 
   } // end function print

private:
   int x;  
}; // end class Count

int main()
{
   Count counter; // create counter object 
   Count *counterPtr = &counter; // create pointer to counter
   Count &counterRef = counter; // create reference to counter

   cout << "Set x to 1 and print using the object's name: ";
   counter.setX( 1 ); // set data member x to 1
   counter.print(); // call member function print

   cout << "Set x to 2 and print using a reference to an object: ";
   counterRef.setX( 2 ); // set data member x to 2
   counterRef.print(); // call member function print

   cout << "Set x to 3 and print using a pointer to an object: ";
   counterPtr->setX( 3 ); // set data member x to 3
   counterPtr->print(); // call member function print
   return 0;  
} // end main

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