list1309.cpp

来自「teach yourself C++ in 21 days 第五版」· C++ 代码 · 共 46 行

//Listing 13.9 

#include <iostream>
using namespace std;
int main()
{
   int  AllocationSize = 5;
   int *pArrayOfNumbers = new int[AllocationSize];
   int  ElementsUsedSoFar = 0;
   int  MaximumElementsAllowed = AllocationSize;
   int  InputNumber = -1;
  
   cout << endl << "Next number = ";
   cin >> InputNumber;

   while ( InputNumber > 0 )
   {
      pArrayOfNumbers[ElementsUsedSoFar++] = InputNumber;
 
      if ( ElementsUsedSoFar == MaximumElementsAllowed )
      {
          int *pLargerArray =
              new int[MaximumElementsAllowed+AllocationSize];
 
          for ( int CopyIndex = 0;
              CopyIndex < MaximumElementsAllowed;
              CopyIndex++ )
          {
              pLargerArray[CopyIndex] = pArrayOfNumbers[CopyIndex];
          };
 
          delete [] pArrayOfNumbers;
          pArrayOfNumbers = pLargerArray;
          MaximumElementsAllowed+= AllocationSize;
      };
      cout << endl << "Next number = ";
      cin >> InputNumber;
   }
 
   for (int Index = 0; Index < ElementsUsedSoFar; Index++)
   {
     cout << pArrayOfNumbers[Index] << endl;
   }
   return 0;
 }