6-6 TDVector (10分)
6-6 TDVector (10分)
There is a class TDVector that is incompleted. Please complete the class according to the test code in Main.
函数接口定义：
class TDVector {
private double x;
private double y;
public String toString() {
return “(”+this.x+","+this.y+")";
}
}
裁判测试程序样例：
import java.util.Scanner;
class TDVector {
private double x;
private double y;
public String toString() {
return “(”+this.x+","+this.y+")";
}
/** 你所提交的代码将被嵌在这里（替换此行） **/
}
public class Main {
public static void main(String[] args) {
TDVector a = new TDVector(); // default ctor, x and y are zeros
Scanner sc = new Scanner(System.in);
double x,y,z;
x = sc.nextDouble();
y = sc.nextDouble();
z = sc.nextDouble();
TDVector b = new TDVector(x, y); // ctor by x and y
TDVector c = new TDVector(b); // ctor by another TDVector
a.setY(z);
System.out.println(a);
System.out.println(b);
System.out.println©;
c.setX(z);
a = b.add©;
System.out.println(a);
System.out.println(“b.x=”+b.getX()+" b.y="+b.getY());
sc.close();
}
}
输入样例：
3.14 1.9 2.72
输出样例：
(0.0,2.72)
(3.14,1.9)
(3.14,1.9)
(5.86,3.8)
b.x=3.14 b.y=1.9
/*
作者:马志勇
*/
public TDVector() {
}
public TDVector(double x, double y) {
this.x = x;
this.y = y;
}
public void setX(double x) {
this.x = x;
}
public void setY(double y) {
this.y = y;
}
public TDVector(TDVector b) {
x = b.x;
y = b.y;
}
public TDVector add(TDVector r) {
TDVector tmp = new TDVector(this);
tmp.x =tmp.x+r.x;
tmp.y =tmp.y + r.y;
return tmp;
}
public double getX() {
return x;
}
public double getY() {
return y;
}
