Removing Duplicates from an Array using C [duplicate]

Answer 1

int a[11]={1,2,3,4,5,11,11,11,11,16,16};

As this array is sorted array, you can achieve very easily by following code.

int LengthofArray = 11;

//First elemnt can not be a duplicate so exclude the same and start from i = 1 than 0.

for(int i = 1; i < LengthofArray; i++);
{
   if(a[i] == a[i-1])
      RemoveArrayElementatIndex(i);
}

//function is used to remove the elements in the same as index passed to remove.

RemoveArrayElementatIndex(int i)
{
   int k  = 0;

   if(i <=0)
   return;


   k = i;
   int j =1; // variable is used to next item(offset) in the array from k.

   //Move the next items to the array    
   //if its last item then the length of the array is updated directly, eg. incase i = 10.

   while((k+j) < LengthofArray)
   { 
     if(a[k] == a[k+j])
     {
         //increment only j , as another duplicate in this array
         j = j +1 ;
     }
     else
     {
         a[k] = a[k+j];
         //increment only k , as offset remains same
         k = k + 1;   
     }

   }   

   //set the new length of the array . 
   LengthofArray = k; 

}