operator overloading example

#include <bits/stdc++.h>

using namespace std;

class Set
{
    int element[100];
    int size;
    public:
    Set(){}
    Set(int arr[], int n)
    {
        size = n;
        for(int i = 0; i<n; i++) element[i] = arr[i];
    }
    void show()
    {
        for(int i = 0; i<size; i++) cout << element[i] << ' ';
        cout << endl;
    }
    Set operator+(const Set &obj)
    {
        int arr[100];
        int k = 0;
        for(int i = 0; i<size; i++)
        {
            bool found = false;
            for(int j = 0; j<k; j++)
            {
                if(element[i] == arr[j])
                {
                    found = true;
                    break;
                }
            }
            if(found==false) arr[k++] = element[i];
        }
        for(int i = 0; i<obj.size; i++)
        {
            bool found = false;
            for(int j = 0; j<k; j++)
            {
                if(obj.element[i] == arr[j])
                {
                    found = true;
                    break;
                }
            }
            if(found==false) arr[k++] = obj.element[i];
        }
        Set temp(arr, k);
        return temp;
    }
    Set operator-(const Set &obj)
    {
        int arr[100];
        int k = 0;
        for(int i = 0; i<size; i++)
        {
            bool found = false;
            for(int j = 0; j<obj.size; j++)
            {
                if(element[i] == obj.element[j])
                {
                    found = true;
                    break;
                }
            }
            if(found == false) arr[k++] = element[i];
        }
        Set temp(arr, k);
        return temp;
    }
    bool operator|=(const Set &obj)
    {
        for(int i = 0; i<size; i++)
        {
            bool found = false;
            for(int j = 0; j<obj.size; j++)
            {
                if(element[i] == obj.element[j])
                {
                    found = true;
                    break;
                }
            }
            if(found == false) return false;
        }
        return true;
    }
};

int main() {
    int arr[] = {2,4};
    int arr2[] = {11,2,32,4};
    Set st(arr, 2), st2(arr2, 4), st3;
    cout << (st |= st2) << endl;
}