学步园

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