I need help to creater allocate space.
Here is what I have
Qt Code: 
  1. class Array
  2. {
  3.     friend ostream &operator<<( ostream &, const Array & );
  4.     friend istream &operator>>( istream &, Array & );
  5. public:
  6.    Array( int = 10,int =10 ); 
  7.    Array( const Array & ); 
  8.  ~Array();
  9.    // inequality operator; returns opposite of == operator
  10.    bool operator!=( const Array &right ) const
  11.    {
  12.       return ! ( *this == right ); // invokes Array::operator==
  13.    } // end function operator!=
  14.  
  15.    // subscript operator for non-const objects returns modifiable lvalue
  16.    int &operator[]( int );
  17.  
  18.    // subscript operator for const objects returns rvalue
  19.    int operator[]( int ) const;
  20. private:
  21.    int size, m,n; // pointer-based array size
  22.    int a[10][10]; // pointer to first element of pointer-based array
  23. }; // end class Array
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My code so far
Qt Code: 
  1. #include <iostream>
  2. #include <iomanip>
  3. using namespace std;
  4. #include "array.h" 
  5.  
  6.  
  7. Array::Array( int m, int n )
  8.  {
  9.    size = ( m*n > 0 ? m*n : 10 ); // validate arraySize
  10.    a[m][n] =*new int[size]; // create space for pointer-based array
  11.  
  12.    for ( int i = 0; i < m ;i++ )
  13.        for ( int j = 0; j <n; j++ )
  14.       a[ i ][j] = 0; // set pointer-based array element
  15.   } 
  16.  
  17.  
  18. Array::~Array()
  19. {
  20. delete  *[]a;
  21. }
  22.  
  23.  Array::Array( const Array &arrayToCopy )
  24.         : size( arrayToCopy.size )
  25.    {
  26.      a[m][n]= *new int[ size ]; 
  27.  
  28.     for (int i = 0; i < n; i++ )
  29.         for (int j = 0; i < m; j++ )
  30.       a[ i ][j] = arrayToCopy.a[ i ][j]; 
  31.  
  32. } 
  33.  
  34.  
  35.  
  36. int main()
  37. {
  38. Array mat1;
  39. Array mat2(4,5);
  40. }
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When I run it, it runs ok . But if I implement the destructor , it crashes. I think my memory allocation for a is probably screwy too.. Helpl