static void Main3() { Console.WriteLine("Nhap thong tin da thuc thu 1"); DATHUC t1 = new DATHUC(4); t1.Nhap(); Console.WriteLine("Nhap thong tin da thuc thu 2"); DATHUC t2 = new DATHUC(4); t2.Nhap(); DATHUC t3 = t1.Tong(t2); if (t3 == null) { Console.WriteLine("Hai da thuc co kich co khac nhau"); } else { Console.WriteLine("Tong hai da thuc"); t3.Hien(); } DATHUC t4 = t1.Hieu(t2); if (t4 == null) { Console.WriteLine("Hai da thuc co kich co khac nhau"); } else { Console.WriteLine("Hieu hai da thuc"); t4.Hien(); } Console.ReadKey(); }
public DATHUC Hieu(DATHUC T2) { if (this.n == T2.n) { DATHUC t = new DATHUC(this.n); for (int i = 0; i < n; i++) { t.a[i] = this.a[i] - T2.a[i]; } return(t); } else { return(null); } }