Number of elements which are different

#include <stdio.h>
#include <string>
#include <iostream>
using namespace std;
int Count(double array[],int size)
{
    int count= 0;

    for(int i=0;i<size;i++)
    {
        bool isEqual = false;
        for(int j=size;j>0;j--)
        {
            if(array[i] == array[j] && j!=i){
                isEqual= true;

            }
        }
        if(isEqual == false){
            count++;
        }


    }
    return count;
}


int main()
{
    double array[6] = {1,2,3,8,2,10};

    cout << Count(array,6) << endl;

    return 0;
}