运算符重载

class byte { unsigned char b; public: byte(unsigned char B = 0 ):b(B){} //@一元运算符 //no side effects: const member function: const byte& operator+() const{ return *this; } const byte operator-() const{ return byte(-b); } byte operator!(){ return byte(!b); } byte* operator&(){ return this; } //side effects:non-const memeber function: const byte& operator++(){ b++; return *this; }; const byte operator++(int){ byte before(b); b++; return before; } const byte& operator--(){ --b; return *this; } const byte operator--(int){ byte before(b); --b; return before; } //@二元运算符 const byte operator+(const byte& right) const{ return byte(b + right.b); } const byte operator-(const byte& right) const{ return byte(b - right.b); } const byte operator*(const byte& right) const{ return byte(b * right.b); } const byte operator/(const byte& right) const{ return byte(b / right.b); } const byte operator^(const byte& right) const{ return byte(b^right.b); } const byte operator&(const byte& right) const { return byte(b & right.b); } const byte operator|(const byte& right) const { return byte(b | right.b); } const byte operator>>(const byte& right) const { return byte(b >> right.b); } const byte operator<<(const byte& right) const { return byte(b << right.b); } //assignments modify & return l value. //operator= can only be a member function byte& operator =(const byte& right){ if (this == &right) return *this; b = right.b; return *this; } byte& operator+=(const byte& right){ if (this == &right){ b += right.b; return *this; } } byte& operator-=(const byte& right){ if (this == &right){ b -= right.b; return *this; } } byte& operator*=(const byte& right){ if (this == &right){ b *= right.b; return *this; } } byte& operator/=(const byte& right){ if (this == &right){ b /= right.b; return *this; } } byte& operator%=(const byte& right){ if (this == &right){ b %= right.b; return *this; } } byte& operator^=(const byte& right){ if (this == &right){ b ^= right.b; return *this; } } byte& operator&=(const byte& right){ if (this == &right){ b &= right.b; return *this; } } byte& operator|=(const byte& right){ if (this == &right){ b |= right.b; return *this; } } byte& operator>>=(const byte& right){ if (this == &right){ b >>= right.b; return *this; } } byte& operator<<=(const byte& right){ if (this == &right){ b <<= right.b; return *this; } } //conditional operators return true / false int operator==(const byte& right) const{ return b == right.b; } int operator!=(const byte& right) const{ return b != right.b; } int operator<(const byte& right) const{ return b < right.b; } int operator>(const byte& right) const{ return b > right.b; } int operator<=(const byte& right) const{ return b <= right.b; } int operator>=(const byte& right) const{ return b >= right.b; } int operator&&(const byte& right) const{ return b && right.b; } int operator||(const byte& right) const{ return b || right.b; } void print(ostream& os) const{ os<<"0x"<<hex<<int(b)<<dec; } /* b1 = b1 * b2 + b2%b1; #define TRY1(op)/ out << "b1 = "; b1.print(out);/ out << "，b2 = "; b2.print(out);/ out << "; b1"#op"b2 produces";/ (b1 op b2).print(out);/ out << endl; */ };