asd

#include <stdio.h>

class fermion {
protected:
    int spin;   //spin/2
    int mass;   //massa
public:
    fermion(int s, int m) : spin(s), mass(m) {}
    fermion(const fermion& A) {spin=A.spin; mass=A.mass;}
    fermion(void) {spin=1; mass=1;}
    int s(void) {return spin;}
    int m(void) {return mass;}
    void print(const char c[]="\b") {printf("\nFermion %s: spin=%d/2, mass=%d",c,spin,mass); if(spin%2==0) printf("\tThis is not fermion!! It is BOSON");}

    friend fermion operator++(fermion&, int);
    friend bool operator >(fermion, fermion);

    fermion operator+(fermion A) {return fermion(A.spin+this->spin,A.mass+this->mass);}
    void operator=(const fermion& A) {spin=A.spin; mass=A.mass;}
};
fermion operator*(int,fermion);
bool operator==(fermion,fermion);

fermion operator*(int k, fermion A) {
    return fermion(A.s(),A.m()*k);
}
bool operator==(fermion A, fermion B) {
    return (A.s()==B.s() && A.m()==B.m())
            ?   1
            :   0;
}

fermion operator++(fermion& A, int) {
    A.spin=A.spin+1;
    return A;
}

bool operator >(fermion A, fermion B) {
    return (A.mass>B.mass)
            ?   1
            :   0;
}

int main() {
    fermion e1(1,1),e2(1,2),e3;
    e1.print("      e1");
    e2.print("      e2");
    e1=e1+e1+e1;
    e1.print("      e1");
    e3=e2+e2+e2;
    e3.print("      e3");
    if(e3>e1) printf("\ne3>e1");
    e3=10*e3;
    e3.print("    10e3");
    e3++;
    e3.print("  10e3++");
    e3++;
    e3.print("10e3++++");

}