#include <stdio.h>
#include <conio.h>
#include <string.h>

#define MAX 6

char *names[MAX] ;
int count ;

int add ( char * ) ;
void swap ( int, int ) ;
void show( ) ;

void main( )
{
    int flag ;

    clrscr( ) ;

    flag = add ( "akshay" ) ;
    if ( flag == 0 )
        printf ( "Unable to add string" ) ;

    flag = add ( "parag" ) ;
    if ( flag == 0 )
        printf ( "Unable to add string" ) ;

    flag = add ( "raman" ) ;
    if ( flag == 0 )
        printf ( "Unable to add string" ) ;

    flag = add ( "srinivas" ) ;
    if ( flag == 0 )
        printf ( "Unable to add string" ) ;

    flag = add ( "gopal" ) ;
    if ( flag == 0 )
        printf ( "Unable to add string" ) ;

    flag = add ( "rajesh" ) ;
    if ( flag == 0 )
        printf ( "Unable to add string" ) ;
    printf ( "\nNames before swapping:\n" ) ;
    show ( ) ;

    swap ( 2, 3 ) ;
    printf ( "\nNames after swapping:\n" ) ;
    show ( ) ;

    getch( ) ;
}

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

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

/* displays the elements */
void show ( )
{
    int i ;
    for ( i = 0 ; i < count ; i++ )
        puts ( names[i] ) ;
}