// sp phu'c

#include<iostream.h>

#include<math.h>

#include<conio.h>

class SP

{

int pt,pa;

public:

void nhap();

void in();

SP operator*(SP);

void chia(SP);

SP operator+(SP);

SP operator-(SP);

friend float tinh(SP);

};

void SP::nhap()

{

cout<<"nhap phan thuc: ";cin>>pt;

cout<<"nhap phan ao: ";cin>>pa;

}

void SP::in()

{

cout<<pt<<"+"<<pa<<"i

";

}

SP SP::operator*(SP a)

{ SP kq;

kq.pt=pt*a.pt;

kq.pa=pa*a.pa;

return(kq);

}

SP SP::operator+(SP a)

{ SP kq;

kq.pt=pt+a.pt;

kq.pa=pa+a.pa;

return(kq);

}

SP SP::operator-(SP a)

{ SP kq;

kq.pt=pt-a.pt;

kq.pa=pa-a.pa;

return(kq);

}

void SP::chia(SP a)

{ float x,y;

cout<<(x=float(pt)/float(a.pt))<<"+"<<(y=float(pa)/float(a.pa))<<"i

";

}

float tinh(SP a)

{ return(sqrt(a.pt*a.pt+a.pa*a.pa)); }

void main()

{

SP a,b,k,h,i;

a.nhap() ; cout<<'

'; b.nhap();

k=a+b;k.in();

h=a-b;h.in();

i=a*b;i.in();

a.chia(b);

cout<<tinh(a)<<'

'<<tinh(b);// hoac co the sd qua ham ban

getch();

}