Removing duplicate from an Array

Write a function removedups() which takes an array A, its size n as parameters.The function removes the duplicate elements in A, and returns the new size of the array . Do not use an other arrays in this function.
#include<stdio.h>
int removedups(int a[], int i);
int main()
{
  int a[50],i,d,j,y;
  printf("entr the numbers respectively and enter ctrl-d in the end \n");
  i=0;
  while(scanf("%d",&d)!=EOF)
    {
      a[i]=d;
      i=i+1;
    }
  y=removedups(a,i);
  printf("%d elements are unique among %d the new array is\n",y,i);
  for(j=0;j<y;j++)
    {
      printf("%d ",a[j]);
    }
  printf("\n");
  return 0;
}
int removedups(int a[],int i )
{
  int count,j,temp,k,counter;
  count=0;
  for(j=0;j<i;j++)
  { 
    k=j+1;
    counter=0;
    while(k<i)
      { 
        if(a[j]==a[k])
          {
            counter++;
            temp=a[j+counter];
            a[j+counter]=a[k];
            a[k]=temp;
          }
 k++;
      }
    if(counter==0)
      {
       a[count]=a[j];
       count++;
      }
    j=j+counter;
  }    
   return count;
}