Implementation of Arrays in C

WASE - Semester 1 - C Programs


/*C: Program to implement an array. */

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

#define MAX 5

void insert ( int *, int pos, int num ) ;
void del ( int *, int pos ) ;
void reverse ( int * ) ;
void display ( int * ) ;
void search ( int *, int num ) ;

void main( )
{
            int arr[5] ;

            clrscr( ) ;

            insert ( arr, 1, 11 ) ;
            insert ( arr, 2, 12 ) ;
            insert ( arr, 3, 13 ) ;
            insert ( arr, 4, 14 ) ;
            insert ( arr, 5, 15 ) ;

            printf ( "\nElements of Array: " ) ;
            display ( arr ) ;

            del ( arr, 5 ) ;
            del ( arr, 2 ) ;
            printf ( "\n\nAfter deletion: " ) ;
            display ( arr ) ;

            insert ( arr, 2, 222 ) ;
            insert ( arr, 5, 555 ) ;
            printf ( "\n\nAfter insertion: " ) ;
            display ( arr ) ;
            reverse ( arr ) ;
            printf ( "\n\nAfter reversing: " ) ;
            display ( arr ) ;
            search ( arr, 222 ) ;
            search ( arr, 666 ) ;

            getch( ) ;
}

/* inserts an element num at given position pos */
void insert (int *arr, int pos, int num )
{
            /* shift elements to right */
            int i ;
            for ( i = MAX - 1 ; i >= pos ; i-- )
                        arr[i] = arr[i - 1] ;
            arr[i] = num ;
}

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

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

/* searches array for a given element num */
void search ( int *arr, int num )
{
            /* Traverse the array */
            int i ;
            for ( i = 0 ; i < MAX ; i++ )
            {
                        if ( arr[i] == num )
                        {
                                    printf ( "\n\nThe element %d is present at %dth position.", num,
                                                            i + 1 ) ;
                                    return ;
                        }
            }

            if ( i == MAX )
                        printf ( "\n\nThe element %d is not present in the array.", num ) ;
}

/* displays the contents of a array */
void display ( int *arr )
{
            /* traverse the entire array */
            int i ;
            printf ( "\n" ) ;
            for ( i = 0 ; i < MAX ; i++ )
                        printf ( "%d\t", arr[i] ) ;
}

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