Array remove duplicate elements

Question

I have an unsorted array, what is the best method to remove all the duplicates of an element if present?

e.g:

a[1,5,2,6,8,9,1,1,10,3,2,4,1,3,11,3]
         


        

Answer 1

Time O(n) space O(n) 

#include 
    #include
    using namespace std;
    void fun(int arr[],int size){

        int count=0;
        int has[100]={0};
        for(int i=0;i