phanso

[Duynguyen1819]

using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Reflection.Metadata.Ecma335;
using System.Text;

namespace ConsoleApp3
{
    public class PhanSo
    {
        private int tu;
        private int mau;
        // constructor
        public PhanSo()
        {
            this.tu = 0;
            this.mau = 1;
        }
        public PhanSo(int tu, int mau)
        {
            this.tu = tu;
            this.mau = mau;
        }
        // set,get
        public int Tu
        {
            get { return tu; }
            set { tu = value; }
        }
        public int Mau
        {
            get { return mau; }
            set { mau = value; }
        }
        public static PhanSo operator +(PhanSo phanso1, PhanSo phanso2)
        {
            return new PhanSo
            {
                Tu = phanso1.Tu * phanso2.Mau + phanso1.Mau * phanso2.Tu,
                Mau = phanso1.Mau * phanso2.Mau
            };
        }
        public static PhanSo operator -(PhanSo phanso1, PhanSo phanso2)
        {
            return new PhanSo
            {
                Tu = phanso1.Tu * phanso2.Mau - phanso2.Tu * phanso1.Mau,
                Mau = phanso1.Mau * phanso2.Mau
            };
        }
        public static PhanSo operator *(PhanSo phanso1, PhanSo phanso2)
        {
            return new PhanSo
            {
                Tu = phanso1.Tu * phanso2.Tu,
                Mau = phanso1.Mau * phanso2.Mau
            };
        }
        public static PhanSo operator /(PhanSo phanso1, PhanSo phanso2)
        {
            return new PhanSo
            {
                Tu = phanso1.Tu * phanso2.Mau,
                Mau = phanso1.Mau * phanso2.Tu
            };
        }
        public void hoanvi(int a, int b)
        {
            int temp = a;
            a = b;
            b = temp;
        }
        public static int USCLN(int a, int b)
        {
            if (a == 0 || b == 0)
                return a + b;
            while (a != b)
                if (a > b)
                    a = a - b;
                else
                    b = b - a;
            return a;
        }
        public bool latoigian()
        {
            return USCLN(tu, mau) == 1;
        }
        public PhanSo rutgon()
        {
            if (latoigian())
            {
                return this; 
            }
            else
            {
                return new PhanSo
                {
                    Tu = Tu / USCLN(Tu, Mau),
                    Mau = Mau / USCLN(Tu, Mau)
                };
            }
        }
    }
}