[問題] 作業七...

[INsoarDEEP (green)]

我好不容易寫完了，但是一Run下去就掛掉了，可否請大家幫幫忙指點一下呢？

以下為code

#include <iostream>
#include <cstdlib>
#include <vector>
using namespace std;
class IntArray
{    public:
            IntArray(const size_t n = 0)
            {    _size = n;
                 _capacity = n;
                 _data = new int [ n ];
                 delete []_data;
            };
            size_t size() const;
            int getData(const size_t i) const;
            int* getPosition(const size_t i) const;
            void resize(const size_t s);
            void setData(const size_t i, const int& v);
     private:
             int *_data;
             size_t _size;
             size_t _capacity;
};
size_t IntArray::size() const
{
     return _size;
}
int IntArray::getData(const size_t i) const
{
     cout << _data[ i ] << endl;
     return 0;
}
int* IntArray::getPosition(const size_t i) const
{
     cout << _data << endl;
     return 0;
}
void IntArray::resize(const size_t s)
{
     if ( s < _size )
       { _size = s; }
     if (  _size < s <= _capacity )
       { _size = s; }
     if ( s > _capacity )
       {
            while ( s > _capacity )
            {
                  _capacity = _capacity*2;
            };
       }
}

void IntArray::setData(const size_t i, const int& v)
{     if ( i >= _size )
        {  resize(i+1); }
      else
      _data [ i ] = v;
}
static void printArray(const IntArray& arr)
{
   cout << "Access by index  : ";
   for (size_t i = 0, n = arr.size(); i < n; i++)
      cout << "[" << i << "] " << arr.getData(i) << "  " << endl;

   cout << "Access by pointer: ";
   for (size_t i = 0, n = arr.size(); i < n; i++)
      cout << "[" << i << "] " << *(arr.getPosition(i)) << "  " << endl;
}

int main()
{
   IntArray arr(10);

   cout << "Initial data for arr ---" << endl;
   printArray(arr);

   for (size_t i = 0, n = arr.size(); i < n; i++)
      arr.setData(i, i*i);
   cout << "Squared data for arr ---" << endl;
   printArray(arr);

   arr.resize(5);
   cout << "Resize arr to 5 ---" << endl;
   printArray(arr);

   arr.resize(12);
   cout << "Resize arr to 12 ---" << endl;
   printArray(arr);

   for (size_t i = 12; i < 20; i += 2)
      arr.setData(i, i * 3);
   cout << "Setting out of bound data ---" << endl;
   printArray(arr);
}



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