Wednesday, August 6, 2008

Representing Arrays as a class in cpp

Program to implement an array.(Source Code)
// Program Ch02pr01
// Program to implement an array.

#include 

using namespace std;

const int MAX = 100 ;

class array
{
    private :

        int arr[MAX] ;
        int N;
        int pos;

    public :
        void create(int i)
        {
             N=i;
             int arr[N];
             pos=0;
             
        }
        void add(int n);
        void insert ( int pos, int num) ;
        void del ( int pos ) ;
        void reverse( ) ;
        void display( ) ;
        void search ( int num ) ;
} ;
void array::add(int n)
{
     arr[pos++]=n;
}
// inserts an element num at given position pos
void array :: insert ( int pos, int num )
{
    // shift elements to right
    int i;
    for ( i = N - 1 ; i >= pos ; i-- )
    {
        arr[i] = arr[i - 1] ;
    }
    arr[i] = num ;

} 

// deletes an element from the given position pos
void array :: del ( int pos )
{
    // skip to the desired position
    int i;
    for (  i = pos ; i < N ; i++ )    
        arr[i - 1] = arr[i] ;
    arr[i - 1] = 0 ;

}

// reverses the entire array
void array :: reverse( )
{
    for ( int i = 0 ; i < N / 2 ; i++ )
    {
        int temp = arr[i] ;
        arr[i] = arr[N - 1 - i] ;
        arr[N - 1 - i] = temp ;
    }
}

// searches array for a given element num
void array :: search ( int num )
{
    // Traverse the array
    int i;
    for (  i = 0 ; i < N ; i++ )
    {
        if ( arr[i] == num )
        {
            cout << "\n\nThe element " << num << " is present at "<< ( i + 1 ) << "th position" ;
            return ;
        }
    }

    if ( i == N )
        cout << "\n\nThe element " << num << " is not present in the array" ;
}

// displays the contents of a array
void array :: display( )
{
    cout<< endl ;
    // traverse the entire array
    for ( int i = 0 ; i < N ; i++ )
        cout << "  " << arr[i] ;
}

int main( )
{
    array a ;
    a.create(6);
    a.insert ( 1,11 ) ;
    a.insert ( 2,12 ) ;
    a.insert ( 3,13 ) ;
    a.insert ( 4,14 ) ;
    a.insert ( 5,15 ) ;
    a.insert(6, 16);

    cout << "\nElements of Array: " ;
    a.display( ) ;

    a.del ( 5 ) ;
       a.del ( 2 ) ;
    cout << "\n\nAfter deletion: " ;
    a.display( ) ;

    a.insert ( 2, 222 ) ;
    a.insert ( 5, 555 ) ;
    cout << "\n\nAfter insertion: " ;
    a.display( ) ;

    a.reverse( ) ;
    cout << "\n\nAfter reversing: " ;
    a.display( ) ;

    a.search ( 222 ) ;
    a.search ( 666 ) ;
    getch();
    return 0;
}

Reactions:

0 comments:

Post a Comment