Write Program to remove duplicate elements in an array

07 January 2023

Write Program to remove duplicate elements in an array



Description

Get an array as input from the user and then remove all the duplicate elements in that array.

Input

Enter the size of array

5

Enter the elements of array

35  35  45  60  60

Output

35 45 60

 

C Program

#include<stdio.h>

int dupRemove(int arr[], int n)

{

   if (n==0 || n==1)

     return n;

   int temp[n];

   int j = 0;

   for(int i=0; i<n-1; i++)

   {

      if (arr[i] != arr[i+1])

         temp[j++] = arr[i];

   }

   temp[j++] = arr[n-1];

   for(int i=0; i<j; i++)

     arr[i] = temp[i];

   return j;

}

int main()

{

    int n;

    printf("Enter the size of array: ");

    scanf("%d",&n);

    int arr[n];

    printf("Enter the elements of array: ");

    for(int i=0;i<n;i++)

    scanf("%d",&arr[i]);

    int s = dupRemove(arr, n);

   for (int i=0; i<s; i++)

      printf("%d ", arr[i]);

 

   return 0;

}

 

C++ Program

#include<iostream>

using namespace std;

int dupRemove(int arr[], int n)

{

   if (n==0 || n==1)

     return n;

   int temp[n];

   int j = 0;

   for(int i=0; i<n-1; i++)

   {

      if (arr[i] != arr[i+1])

         temp[j++] = arr[i];

   }

   temp[j++] = arr[n-1];

   for(int i=0; i<j; i++)

     arr[i] = temp[i];

   return j;

}

int main()

{

    int n;

    cout<<"Enter the size of array: ";

    cin>>n;

    int arr[n];

    cout<<"Enter the elements of array: ";

    for(int i=0;i<n;i++)

    cin>>arr[i];

    int s = dupRemove(arr, n);

   for (int i=0; i<s; i++)

      cout<<arr[i]<<" ";

 

   return 0;

}

 

Java Program

import java.util.Scanner;

class Main

{

   static int removeDup(int arr[], int n)

   {

      if (n==0 || n==1)

         return n;

      int j = 0;

      for (int i=0; i<n-1; i++)

          if (arr[i] != arr[i+1])

             arr[j++] = arr[i];

      arr[j++] = arr[n-1];

      return j;

   }

   public static void main (String[] args)

   {

    int n;

    Scanner sc = new Scanner(System.in);

    System.out.println("Enter the size of the array: ");

    n = sc.nextInt();

    int[]arr = new int[n];

    System.out.println("Enter the array elements: ");

    for(int i = 0; i < n; i++)

    {

        arr[i] = sc.nextInt();

    }

      int s = removeDup(arr, n);

      for (int i=0; i<s; i++)

        System.out.print(arr[i]+" ");

   }

}

 

Python Program

def removeDup(arr, n):

    if n == 0 or n == 1:

        return n

    temp = list(range(n))

    j = 0;

    for i in range(0, n-1):

        if arr[i] != arr[i+1]:

            temp[j] = arr[i]

            j += 1

 

    temp[j] = arr[n-1]

    j += 1

 

    for i in range(0, j):

        arr[i] = temp[i]

    return j

 

n = int(input("Enter size of array: "))

arr = []

print("Enter array elements: ")

for i in range(0,n):

                temp = int(input())

                arr.append(temp)

n = removeDup(arr, n)

for i in range(n):

    print ("%d"%(arr[i]), end = " ")


If you are from 2023 batch student, Join our Telegram group for placement preparation and coming placement drive updates : https://t.me/talentbattle2023

Related Articles

Ask Us Anything !