fig16_03.cpp

经典的<<C how to program>一书第三版的例程。非常适合于C的初学者。

// Fig. 16.3: fig16_03.cpp
// Demonstrating the class member access operators . and ->
//
// CAUTION: IN FUTURE EXAMPLES WE AVOID PUBLIC DATA!
#include <iostream>

using std::cout;
using std::endl;

// Simple class Count
class Count {
public:
   int x;
   void print() { cout << x << endl; }
};

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

   cout << "Assign 7 to x and print using the object's name: ";
   counter.x = 7;       // assign 7 to data member x
   counter.print();     // call member function print

   cout << "Assign 8 to x and print using a reference: ";
   counterRef.x = 8;    // assign 8 to data member x
   counterRef.print();  // call member function print

   cout << "Assign 10 to x and print using a pointer: ";
   counterPtr->x = 10;  // assign 10 to data member x
   counterPtr->print(); // call member function print
   return 0;
}




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