JAVA Xậy Dựng Lớp đa Thức Vs Các Phương Thức ...

Đây là source của mình : ‘’’

public class dathuc { private int n; private double a[]; public int getN(){ return n; } public void setN(int n){ this.n = n; } public double[] getA(){ return a; } public dathuc() { n = 0; a = null; } public dathuc(int n) { this.n = n; a = new double[n]; } public dathuc(double[] a) { this.n = a.length; this.a = new double[n]; for (int i = 0; i < a.length; i++) { this.a[i] = a[i]; } } public dathuc(dathuc b) { this.n = b.n; this.a = new double[n]; for (int i = 0; i < this.a.length; i++) { this.a[i] = b.a[i]; } } public void Input() { System.out.print("Nhap bac cua da thuc: "); int n = new Scanner(System.in).nextInt(); a = new double[n]; for (int i = 0; i < n; i++) { System.out.print("Bac thu " + i + " "); a[i] = new Scanner(System.in).nextDouble(); } System.out.println(); } public void Output() { for (int i = 0; i < a.length; i++) { if (i == 0) System.out.print(a[i] + " * X^" + i); else System.out.print(" + " + a[i] + " * X^" + i); } System.out.println(" "); } public dathuc Add(dathuc a) { dathuc c = new dathuc(); int x = this.n > a.n ? this.n : a.n; c.n = x; for (int i = 0; i < x; i++) { c.a[i] = this.n > a.n ? this.a[i] : a.a[i]; } int y = this.n <= a.n ? this.n : a.n; for (int i = 0; i < y; i++) { c.a[i] += (this.n < a.n ? this.a[i] : a.a[i]); } return c; } }

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Đây là hàm chính

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public static void main(String[] args) throws Exception{ double x[] = {3, 4, 5, 6}; dathuc a = new dathuc(); a.Input(); a.Output(); //dathuc b = new dathuc(x); //b.Input(); //b.Output(); dathuc d = new dathuc(x); //d.Input(); d.Output(); //d.Output(); d.Add(a).Output(); dathuc c = new dathuc(d.Add(a)); c.Output(); //b.Add(a).Output(); //System.out.println("???"); }

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