8 coins algorithm

#include<iostream>  
using namespace std;

  
void eightcoin(int arr[]);
void compare(int a, int b, int real, int index1, int index2);
void print(int fake, int real, int i);

int main()//Get the weight of coins
{
    int arr[8];
    //Enter the weight of coins
    cout << "Please enter eight coins:" << endl;
    for (int i = 0; i < 8; i++)
    {
        cin >> arr[i];
    }
    eightcoin(arr);
    return 0;
}

void eightcoin(int arr[])
{
  
    int abc = arr[0] + arr[1] + arr[2];
    int def = arr[3] + arr[4] + arr[5];
    int a = arr[0];
    int b = arr[1];
    int c = arr[2];
    int d = arr[3];
    int e = arr[4];
    int f = arr[5];
    int g = arr[6];
    int h = arr[7];
    if (abc > def)         
    {
        if ((a + e) > (d + b)) 
        {
            compare(a, d, g, 0, 3);

        }
        else if ((a + e) == (d + b))
        {
            compare(c, f, g, 2, 5);
        }
        else
        {
            compare(b, e, g, 1, 4);
        }
    }
    else if (abc == def) 
    {

        if (g == a)
        {
            print(h, g, 7);
        }
        else
        {
            print(g, h, 6);
        }
    }
    else               
    {
        if ((a + e) > (d + b))
        {
            compare(b, e, g, 1, 4);
        }
        else if ((a + e) == (d + b))
        {
            compare(c, f, g, 2, 5);
        }
        else
        {
            compare(a, d, g, 0, 3);
        }
    }

}

void compare(int a, int b, int real, int index1, int index2)//compare coins and find real coins and fake coin.
{
    if (a == real)
    {
        print(b, real, index2);
    }
    else
    {
        print(a, real, index1);
    }
}
void print(int fake, int real, int i)//print the result
{
    if (fake > real)
    {
        cout << "The fake money is located at " << (i + 1)<<" and it is heavier than real one" ;
    }
    else {
        cout << "The fake money is located at" << (i + 1)<<" and it is lighter than real one" ;
    }
}