复数类的实现，写出三种构造函数，算术运算符、关系运算符、逻辑运算符重载尝试实现自增、自减运算符的重载 

#include <iostream>
using namespace std;
class Num
{int rel;   //实部int vir;   //虚部
public:Num():rel(2),vir(1){}Num(int rel,int vir):rel(rel),vir(vir){}Num &operator=(const Num &other){cout << "Num的拷贝赋值函数" << endl;this->rel = other.rel;this->vir = other.vir;return *this;}friend Num operator+(const Num n1,const Num n2);Num operator-(Num &other);friend Num operator*(const Num n1,const Num n2);Num operator/(const Num n1);friend Num operator%(const Num n1,const Num n2);friend bool operator>(const Num n1,const Num n2);bool operator<(const Num n1);friend bool operator>=(const Num n1,const Num n2);bool operator==(const Num n1);friend bool operator<=(const Num n1,const Num n2);friend bool operator&&(const Num n1,const Num n2);bool operator||(const Num n1);friend Num operator++(Num &n1);Num operator++(int);friend Num operator--(Num &n1);Num operator--(int);void show();
};
Num operator+(const Num n1,const Num n2)
{Num temp;temp.rel = n1.rel+n2.rel;temp.vir = n1.vir+n2.vir;return temp;
}
Num Num::operator-(Num &other)
{Num temp;temp.rel = this->rel-other.rel;temp.vir = this->vir-other.vir;return temp;
}
Num operator*(const Num n1,const Num n2)
{Num temp;temp.rel = n1.rel*n2.rel;temp.vir = n1.vir*n2.vir;return temp;
}
Num Num::operator/(const Num n1)
{Num temp;temp.rel = this->rel/n1.rel;temp.vir = this->vir/n1.vir;return temp;
}
Num operator%(const Num n1,const Num n2)
{Num temp;temp.rel = n1.rel%n2.rel;temp.vir = n1.vir%n2.vir;return temp;
}
bool operator>(const Num n1,const Num n2)
{if(n1.rel>n2.rel){return n1.rel>=n2.rel;}else if(n1.rel==n2.rel){return n1.vir>=n2.vir;}return n1.rel>=n2.rel;
}
bool Num::operator<(const Num n1)
{if(this->rel<n1.rel){return this->rel<n1.rel;}else if(this->rel==n1.rel){return this->vir<n1.vir;}return this->rel<n1.rel;
}
bool operator>=(const Num n1,const Num n2)
{if(n1.rel>n2.rel){return n1.rel>n2.rel;}else if(n1.rel==n2.rel){return n1.vir>=n2.vir;}return n1.vir>n2.vir;
}
bool Num::operator==(const Num n1)
{if(this->rel<n1.rel){return this->rel>n1.rel;}else if(this->rel==n1.rel){return this->vir==n1.vir;}return this->rel<n1.rel;
}
bool operator<=(const Num n1,const Num n2)
{if(n1.rel<n2.rel){return n1.rel<n2.rel;}else if(n1.rel==n2.rel){return n1.vir<=n2.vir;}return n1.vir<n2.vir;
}bool operator&&(const Num n1,const Num n2)
{return (n1.rel&&n2.rel)||(n1.vir&&n2.vir);
}
bool Num::operator||(const Num n1)
{return (this->rel||n1.rel)&&(this->vir||n1.vir);
}
Num operator++(Num &n1)
{++(n1.rel);++(n1.vir);return n1;
}
Num Num::operator++(int)
{Num temp;temp.rel=this->rel++;temp.vir=this->vir++;return temp;
}
Num operator--(Num &n1)
{--(n1.rel);--(n1.vir);return n1;
}
Num Num::operator--(int)
{Num temp;temp.rel=this->rel--;temp.vir=this->vir--;return temp;
}
void Num::show()
{cout << rel << " + " << vir << "i" << endl;
}
int main()
{Num n1;Num n2(1,4);Num n3;n3 = n1+n2;n3.show();Num n4;n4=n1-n2;n4.show();n4++;n4.show();--n4;n4.show();cout<<(n4>=n3)<<endl;Num n5;n5--;n5.show();++n5;n5.show();cout<<(n2&&n3)<<endl;cout<<(n2||n5)<<endl;return 0;
}