operator overloading madness....

#include <iostream>

using namespace std;

class overloading{
    int a;
public:
    bool operator==(const overloading& o){return a==o.a;}
    bool operator>=(const overloading& o){return a>=o.a;}
    bool operator&&(const overloading& o){return a && o.a;}
    bool operator<(const overloading& o){return a<o.a;}
    void operator=(int i){a=i;}
    friend ostream& operator<<(ostream& o,const overloading& i){
        o<<i.a;
        return o;
    }

};

int main()
{
    overloading O1,O2,O3,O4,O5,O6,O7;
    O7=((O1>=O2)+(O3 && O4) * (O5<O6));
    cout<<O7;