Thursday, August 7, 2008

Program with the use of array of pointers to strings

Program with the use of array of pointers to strings(Source Code)
// Program: Ch03pr03
// Program with the use of array of pointers to strings


#include
#include
#include


const int MAX = 6 ;

class string
{
    private :

        char *names[MAX] ;
        int count ;

    public :

        string( ) ;
        int add ( char *s ) ;
        void swap ( int i, int j ) ;
        void show( ) ;
} ;

// initialises the data
string :: string( )
{
    count = 0 ;
}

// adds given string
int string :: add ( char *s )
{
    if ( count < MAX )
    {
        names[count] = s ;
        count++ ;
        return 1 ;
    }
    else
        return 0 ;
}

// swaps the names at given two positions
void string :: swap ( int i, int j )
{
    char *temp ;
    temp = names[i] ;
    names[i] = names[j] ;
    names[j] = temp ;
}

// displays the elements
void string :: show( )
{
    cout << endl ;
    for ( int i = 0 ; i < count ; i++ )
        cout << names[i] << "  " ;
    cout << endl ;
}

int main( )
{
    string s ;
    int flag ;

    flag = s.add ( "akshay" ) ;
    if ( flag == 0 )
        cout << "Unable to add string" ;

    flag = s.add ( "parag" ) ;
    if ( flag == 0 )
        cout << "Unable to add string" ;

    flag = s.add ( "raman" ) ;
    if ( flag == 0 )
        cout << "Unable to add string" ;

    flag = s.add ( "srinivas" ) ;
    if ( flag == 0 )
        cout << "Unable to add string" ;

    flag = s.add ( "gopal" ) ;
    if ( flag == 0 )
        cout << "Unable to add string" ;

    flag = s.add ( "rajesh" ) ;
    if ( flag == 0 )
        cout << "Unable to add string" ;

    cout << "\nNames before swapping: " ;
    s.show( ) ;

    s.swap( 2, 3 ) ;
    cout << "\nNames after swapping: " ;
    s.show( ) ;
    getch();
}

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