static void Main(string[] args) { Dathuc t1 = new Dathuc(2); t1.nhap(); Console.WriteLine("cac he so dt 1"); t1.hien(); Dathuc t2 = new Dathuc(2); t2.nhap(); Console.WriteLine("cac he so dt 2"); t2.hien(); Dathuc t3 = t1.tong(t2); Dathuc t4 = t1.tong(t3); if (t3 == null) { Console.WriteLine("2 dt khac bac"); } else { Console.WriteLine("tong 2 dt"); } t3.hien(); if (t4 == null) { Console.WriteLine("2 da thuc khac bac"); } else { Console.WriteLine("hieu 2 dt"); } t4.hien(); Console.ReadKey(); }
public Dathuc hieu(Dathuc t2) { if (this.bac == t2.bac) { Dathuc t = new Dathuc(this.bac); for (int i = 0; i < bac; i++) { t.a[i] = this.a[i] - t2.a[i]; } return(t); } else { return(null); } }