arrover3.cpp

来自「本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向」· C++ 代码 · 共 37 行

// arrover3.cpp
// creates safe array (index values are checked before access)
// uses overloaded [] operator for both put and get

#include <iostream>
using namespace std;
#include <process.h>           //for exit()
const int LIMIT = 100;         //array size
////////////////////////////////////////////////////////////////
class safearay
   {
   private:
      int arr[LIMIT];
   public:
      int& operator [](int n)  //note: return by reference
         {
         if( n< 0 || n>=LIMIT )
            { cout << "\nIndex out of bounds"; exit(1); }
         return arr[n];
         }
   };
////////////////////////////////////////////////////////////////
int main()
   {
   safearay sa1;

   for(int j=0; j<LIMIT; j++)  //insert elements
      sa1[j] = j*10;           //*left* side of equal sign

   for(j=0; j<LIMIT; j++)      //display elements
      {
      int temp = sa1[j];       //*right* side of equal sign
      cout << "Element " << j << " is " << temp << endl;
      }
   return 0;
   }