Delete Duplicate Elements in Array

Delete Duplicate Elements in an Array in C

Array is collection of similar data type, In this code we enter only Integer type values and remove all duplicate value form array list. To delete all duplicate elements from array list you need looping and if else statement.

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

void main()
{
 int arr[20], i, j, k, size;
 
   printf("\nEnter Size of an Array : ");
   scanf("%d", &size);
 
   printf("\nEnter any %d Numbers : ",size);
   for (i = 0; i < size; i++)
      scanf("%d", &arr[i]);
 
   printf("\nArray with Unique list  : ");
   for (i = 0; i < size; i++) 
   {
      for (j = i + 1; j < size;)
	  {
         if (arr[j] == arr[i])
		 {
            for (k = j; k < size; k++)
			{
               arr[k] = arr[k + 1];
            }
            size--;
         }
		 else
            j++;
      }
   }
 
   for (i = 0; i < size; i++) 
   {
      printf("%d ", arr[i]);
   }
getch();
}

Enter Size of an Array : 5
Enter any 5 Numbers : 3 1 4 6 4
Array with Unique list  : 3 1 4 6