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Object

Object

Oriented Programming

Oriented Programming

(OOP)

(OOP)

Lecture No. 34

Lecture No. 34

Print an Array

Print an Array

template< typename T > template< typename T >

void printArray( T* array, int size ) void printArray( T* array, int size )

for ( int i = 0; i < size; i++ )

for ( int i = 0; i < size; i++ )

cout << array[ i ] <<

cout << array[ i ] << “

Generic Algorithms

Generic Algorithms

template< typename T >

template< typename T >

T* find( T* array, T* beyond,T* find( T* array, T* beyond,

const T& x ) {

const T& x ) {

T* p = array; T* p = array;

while ( p != beyond ) {

while ( p != beyond ) {

if ( *p == x )if ( *p == x )

return p;

return p;

p++;p++;

return return beyondbeyond;;

Generic Algorithms

Generic Algorithms

►

►

This algorithm works fine for arrays of any

This algorithm works fine for arrays of any

type

type

►

►

We can make it work for any generic

We can make it work for any generic

container that supports two operations

container that supports two operations

Increment operator (++)

Increment operator (++)

Dereference operator (*)

Dereference operator (*)

Example

Example

Class Template

Class Template

► ►

A

A

Vector

Vector

class template can store data

class template can store data

elements of different types

elements of different types

►

►

Without templates, we need a separate

Without templates, we need a separate

Vector

Vector

class for each data type

class for each data type

Example

Example

Class Template

Class Template

const Vector< T >& operator =( const Vector< T >& operator =(

const Vector< T >& ); const Vector< T >& );

T& operator ; T& operator ;

Example

Example

Class Template

Class Template

template< class T > template< class T >

const Vector& Vector::operator const Vector& Vector::operator

=( const Vector& right) {

=( const Vector& right) {

if ( this != &right ) {

if ( this != &right ) {

delete [] ptr;

delete [] ptr;

size = right.size; size = right.size;

Example

Example

Class Template

Class Template

template< class T >

template< class T >

T& Vector< T >::operator []( T& Vector< T >::operator [](

int index ) {

int index ) {

if ( index < 0 || index >= size ) { if ( index < 0 || index >= size ) {

cout <<

cout << “

Error: index out of

Error: index out of

range range\nn””;;

exit( 1 ); exit( 1 );

return ptr[index]; return ptr[index];

} } docsity.com