コード帳/C++/LILIN - projecthikky @ ウィキ

#include <iostream>
using namespace std;
 
const int SIZE = 1;
 
struct Arry
{
   int n[SIZE];
   int add;
   int *ptr;
};
 
Arry init( Arry &my_arry );
Arry increase( Arry &my_arry );
 
 
int main()
{
   Arry inc;
   Arry *arry_ptr = NULL;
 
   inc = init( inc );
   cout << sizeof inc.n << '\n';
 
   inc = increase( inc );
   cout << sizeof inc.n << '\n';
 
   inc = increase( inc );
   cout << sizeof inc.n << '\n';
 
   return 0;
}
 
Arry init( Arry &my_arry )
{
   my_arry.n[0] = 0;
   my_arry.add = 1;
   my_arry.ptr = 0;
 
   return my_arry;
}
Arry increase( Arry &my_arry )
{
   if ( !my_arry.add && my_arry.add > 1 ) my_arry.add = 1;
   const int LIMIT = 80;
   static int incr = SIZE;
   int *p = 0;
 
   p = &my_arry.n[0];
 
   if ( incr >= LIMIT ) incr = SIZE;
 
   incr += my_arry.add;
   p = new int[incr];
 
   for( int i = 0; i < incr; i++ )
   {
      my_arry.ptr = p;
      p++;
      my_arry.ptr++;
   }
   my_arry.ptr = p;
 
   p = 0;
   delete [] p;
 
   return my_arry;
}