#include"stdio.h"

#include"conio.h"

#include"iostream.h"

#include"math.h"

#include"iomanip.h"

class phanso

    {

            private:

                    int ts,ms;

                public:

                    void nhap(phanso &a);

                        void xuat(phanso &a);

                        friend void rutgon(phanso &a);

                        friend phanso tongps(phanso a,phanso b);

                        friend phanso hieups(phanso a,phanso b);

                        friend phanso tichps(phanso a,phanso b);

                };

void phanso::nhap(phanso &a)

    {

            cout<<"

Nhap tu so:"; cin>>a.ts;

                cout<<"

Nhap mau so:"; cin>>a.ms;

                }

void phanso::xuat(phanso &a)

    {

            cout<<a.ts<<"/"<<a.ms;

                }

int ucln(int x,int y)

    {

            while (x!=y)

                if(x>y)

                    x=x-y;

                else

                    y=y-x;

                        return(x);

                        }

void rutgon(phanso &a)

    {

            int uc;

                uc=ucln(abs(a.ts),abs(a.ms));

                a.ts=a.ts/uc;

                a.ms=a.ms/uc;

                }

phanso tongps(phanso a,phanso b)

    {

            phanso tong;

                tong.ts=a.ts*b.ms+b.ts*a.ms;

                tong.ms=a.ms*b.ms;

                rutgon(tong);

                return(tong);

                }

phanso hieups(phanso a,phanso b)

    {

            phanso hieu;

                hieu.ts=a.ts*b.ms-b.ts*a.ms;

                hieu.ms=a.ms*b.ms;

                rutgon(hieu);

                return(hieu);

                }

phanso tichps(phanso a,phanso b)

    {

            phanso tich;

                tich.ts=a.ts*b.ts;

                tich.ms=a.ms*b.ms;

                rutgon(tich);

                return(tich);

                }

void main()

    {

            phanso ps,a,b;

                clrscr();

                cout<<"

Nhap phan so a:";ps.nhap(a);

                cout<<"

Nhap phan so b:";ps.nhap(b);

                cout<<"

a=";ps.xuat(a);

                cout<<"

b=";ps.xuat(b);

                cout<<"

Tinh toan cho 2 phan so:

";

                cout<<"

a + b ="; ps.xuat(tongps(a,b));

                cout<<"

a - b ="; ps.xuat(hieups(a,b));

                cout<<"

a x b ="; ps.xuat(tichps(a,b));

                getch();

        }