clarray.cpp

《C++面对对象程序设计》的所有源代码和部分头文件

// clarray.cpp
// creates array class
#include <iostream>
using namespace std;
////////////////////////////////////////////////////////////////
class Array                     //models a normal C++ array
   {
   private:
      int* ptr;                 //pointer to Array contents
      int size;                 //size of Array
   public:
      Array(int s)              //one-argument constructor
         {
         size = s;              //argument is size of Array
         ptr = new int[s];      //make space for Array
         }
      ~Array()                  //destructor
         { delete[] ptr; }
      int& operator [] (int j)  //overloaded subscript operator
         { return *(ptr+j); }
   };
////////////////////////////////////////////////////////////////
int main()
   {
   const int ASIZE = 10;        //size of array
   Array arr(ASIZE);            //make an array

   for(int j=0; j<ASIZE; j++)   //fill it with squares
      arr[j] = j*j;

   for(j=0; j<ASIZE; j++)       //display its contents
      cout << arr[j] << ' ';
   cout << endl;
   return 0;
   }