operator-overloading.cpp

#include <iostream>
class Ulong {
    private:
    long long value;
    public:
    Ulong(long long x) : value(x){}
    ~Ulong(){}
    friend bool operator ==(const Ulong x1, const Ulong x2){
        return x1.value == x2.value;
    }
    friend std::ostream &operator <<(std::ostream &os, Ulong obj){
        os << obj.value << std::endl;
        return os;
    }
};
void sosanh(Ulong x1, Ulong x2){
    std::string out = (x1 == x2) ? "True" : "False";
    std::cout << out << std::endl; 
}
int main(){
    Ulong obj(1024), obj1(9981), obj3(1024);
    sosanh(obj1, obj);
    sosanh(obj, obj3);
    std::cout << obj << obj1 << std::endl;
}