Mega Code Archive
Define your own array class
<;
int operator[]( int ) const;
private:
int size;
int *ptr;
};
Array::Array( int arraySize )
{
size = arraySize;
ptr = new int[ size ];
for ( int i = 0; i < size; i++ )
ptr[ i ] = 0;
}
Array::Array( const Array &arrayToCopy ) : size( arrayToCopy.size )
{
ptr = new int[ size ];
for ( int i = 0; i < size; i++ )
ptr[ i ] = arrayToCopy.ptr[ i ];
}
Array::~Array()
{
delete [] ptr;
}
int Array::getSize() const
{
return size;
}
const Array &Array::operator=( const Array &right )
{
delete [] ptr;
size = right.size;
ptr = new int[ size ];
for ( int i = 0; i < size; i++ )
ptr[ i ] = right.ptr[ i ];
return *this;
}
bool Array::operator==( const Array &right ) const
{
if ( size != right.size )
return false;
for ( int i = 0; i < size; i++ )
if ( ptr[ i ] != right.ptr[ i ] )
return false;
return true;
}
int &Array::operator[]( int subscript )
{
return ptr[ subscript ];
}
int Array::operator[]( int subscript ) const
{
return ptr[ subscript ];
}
istream &operator>>( istream &input, Array &a )
{
for ( int i = 0; i < a.size; i++ )
input >> a.ptr[ i ];
return input;
}
ostream &operator<<( ostream &output, const Array &a )
{
int i;
for ( i = 0; i < a.size; i++ ) {
output << a.ptr[ i ];
}
return output;
}
int main()
{
Array integers1( 7 );
Array integers2;
cout << integers1.getSize() << integers1;
cout << integers2.getSize() << integers2;
cout << "\nEnter 17 integers:" << endl;
cin >> integers1 >> integers2;
cout << "integers1:\n" << integers1 << "integers2:\n" << integers2;
if ( integers1 != integers2 )
cout << "integers1 and integers2 are not equal" << endl;
Array integers3( integers1 );
cout << integers3.getSize() << integers3;
integers1 = integers2;
cout << integers1;
cout << integers2;
if ( integers1 == integers2 )
cout << "integers1 and integers2 are equal" << endl;
cout << integers1[ 5 ];
integers1[ 5 ] = 1000;
cout << integers1;
return 0;
}
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