int 运算符重载

来源：互联网发布：android 数据库加密编辑：程序博客网时间：2024/05/13 00:49
为了更深入的理解返回引用和对象，以及运算符重载，做了int的运算符重载：
这里写图片描述
#include <iostream>using namespace std;class Int;ostream& operator<<(ostream &out, const Int &i);class Int{    friend ostream& operator<<(ostream &out, const Int &i);public:    Int(int i = 0) : m_i(i)    {}    ~Int()    {}public:    Int operator+(const Int &i);    Int operator-(const Int &i);    Int operator*(const Int &i);    Int operator/(const Int &i);    Int operator+=(const Int &i);    Int operator-=(const Int &i);    Int operator*=(const Int &i);    Int operator/=(const Int &i);     Int operator%(const Int &i);    Int operator^(const Int &i);    Int operator%=(const Int &i);    Int operator^=(const Int &i);    Int& operator++();  //前置++    Int operator++(int);  //后置++    Int& operator--();    Int operator--(int);    Int& operator+();   //正a    Int& operator-();   //负a    Int& operator~();   //取反    Int& operator!();   //取非    Int& operator>>(int n);  //右移    Int& operator<<(int n);  //左移    Int& operator>>=(int n);   //右移等    Int& operator<<=(int n);   //左移等    bool operator>(const Int &i);    bool operator<(const Int &i);    bool operator>=(const Int &i);    bool operator<=(const Int &i);    bool operator==(const Int &i);    bool operator!=(const Int &i);    Int operator&(const Int &i);  //与运算（位）    Int operator|(const Int &i);  //或运算（位）    bool operator&&(const Int &i);    bool operator||(const Int &i);private:    int m_i;};ostream& operator<<(ostream &out, const Int &i){    out << (i.m_i);    return out;}Int Int::operator+(const Int &i){    return Int(m_i + i.m_i);}Int Int::operator-(const Int &i){    return Int(m_i - i.m_i);}Int Int::operator*(const Int &i){    return Int(m_i * i.m_i);}Int Int::operator/(const Int &i){    return Int(m_i / i.m_i);}Int Int::operator+=(const Int &i){    return Int(m_i += i.m_i);}Int Int::operator-=(const Int &i){    return Int(m_i -= i.m_i);}Int Int::operator*=(const Int &i){    return Int(m_i *= i.m_i);}Int Int::operator/=(const Int &i){    return Int(m_i /= i.m_i);}Int Int::operator%(const Int &i){    return Int(m_i % i.m_i);}Int Int::operator^(const Int &i){    return Int(m_i ^ i.m_i);}Int Int::operator%=(const Int &i){    return Int(m_i %= i.m_i);}Int Int::operator^=(const Int &i){    return Int(m_i ^= i.m_i);}Int& Int::operator++()  //前置++{    m_i++;    return *this;}Int Int::operator++(int)  //后置++{    Int tmp(m_i);    m_i  += 1;    return tmp;}Int& Int::operator--()   //前置--{    m_i--;    return *this;}Int Int::operator--(int)   //后置--{    Int tmp(*this);    m_i -= 1;    return tmp;}Int& Int::operator+()   //正a{    m_i = +m_i;    return *this;}Int& Int::operator-()   //负a{    m_i = -m_i;    return *this;}Int& Int::operator~()   //取反{    m_i = ~m_i;    return *this;}Int& Int::operator!()   //取非{    m_i = !m_i;    return *this;}Int& Int::operator>>(int n)  //右移{    m_i = (m_i >> n);    return *this;}Int& Int::operator<<(int n)  //左移{    m_i = (m_i << n);    return *this;}Int& Int::operator>>=(int n)   //右移等{    m_i >>= n;    return *this;}Int& Int::operator<<=(int n)   //左移等{    m_i <<= n;    return *this;}bool Int::operator>(const Int &i){    return m_i > i.m_i;}bool Int::operator<(const Int &i){    return m_i < i.m_i;}bool Int::operator>=(const Int &i){    return m_i >= i.m_i;}bool Int::operator<=(const Int &i){    return m_i <= i.m_i;}bool Int::operator==(const Int &i){    return m_i == i.m_i;}bool Int::operator!=(const Int &i){    return m_i != i.m_i;}Int Int::operator&(const Int &i)  //与运算（位）{    Int tmp;    tmp.m_i = (m_i & i.m_i);    return tmp;}Int Int::operator|(const Int &i)  //或运算（位）{    Int tmp;    tmp.m_i = m_i | i.m_i;    return tmp;}bool Int::operator&&(const Int &i){    return m_i && i.m_i;}bool Int::operator||(const Int &i){    return m_i || i.m_i;}int main(){    Int i;    Int i1(1);    Int i2(2);    cout << "i1 + i2 = " << i1 + i2 << endl;    cout << "i1 - i2 = " << i1 - i2 << endl;    cout << "i1 * i2 = " << i1 * i2 << endl;    cout << "i1 / i2 = " << i1 / i2 << endl;    cout << "i1 += 2 = " << (i1 += 2) << endl;    cout << "i1 -= i2 = " << (i1 -= i2) << endl;    cout << "i1 *= i2 = " << (i1 *= i2) << endl;    cout << "i1 /= i2 = " << (i1 /= i2) << endl;    cout << "i1 % i2 = " << (i1 % i2) << endl;    cout << "i1 ^ i2 = " << (i1 ^ i2) << endl;    cout << "i1 %= 1 = " << (i1 %= 1) << endl;    cout << "i2 ^= 3 = " << (i2 ^= 3) << endl;    Int i3(1);    Int i4(1);    cout << "++i3 = " << ++i3 << endl;    cout << "i4++ = " << i4++ << endl;    cout << "--i3 = " << --i3 << endl;    cout << "i4-- = " << i4-- << endl;    Int i5(2);    Int i6(3);    cout << (i5 == i6) << endl;    cout << (i5 != i6) << endl;    cout<< "(i5 <<= 1) = " << (i5 <<= 1) << endl;    cout<< "(i5 <<= 1) = " << (i5 <<= 1) << endl;    cout<< "(i6 || 1) = " << (i6 || 1) << endl;    cout<< "(i6 && 0) = " << (i6 && 0) << endl;    cout<< "(i6 | 1) = " << (i6 | 1) << endl;    cout<< "(i6 & 1) = " << (i6 & 1) << endl;    cout<< "-i6 = " << -i6 <<endl;    cout<< "~i6 = " << ~i6 <<endl;    return 0;}
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