#include <stdio.h>

/* is x in the array values, which has size elements? */
int isIn(int x, int values[], int size)
{
    int pos;
    for (pos=0; pos<size; pos++)
        if (x==values[pos]) return 1;
    return 0;
}


int main()
{
    int a[5]= {2,2,3,3,5};
    // how many elements in a?
    int max =sizeof(a)/sizeof(a[0]);

    int pos;
    int loc=0;
    int temp[max]; // make a temporary array
    for (pos=0; pos<max; pos++) // go through a
    {
        // if its not already there..
        if ( !isIn(a[pos], temp, loc))
        {
            // copy into temp
            temp[loc]=a[pos];
            loc++; // we've moved in 'loc' values
        }

    }

// make result array correct size
    int result[loc];
    for (pos=0; pos<loc; pos++)
        // copy values into it
        result[pos]=temp[pos];
    // show result
    for (pos=0; pos<loc; pos++)
        printf("%d %d\n", pos, result[pos]);

    return 0;
}