code. compile. run. debug. share.
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
Point a = new Point();
Point b = new Point();
Point c = new Point();
System.out.println("enter A: ");
a.read(scanner);
System.out.println("enter B: ");
b.read(scanner);
System.out.println("enter C: ");
c.read(scanner);
Triangle triangle = new Triangle(a, b, c);
System.out.println("square: " + triangle.square());
System.out.println("perimeter: " + triangle.perimeter());
System.out.print("median_crossing: ");
triangle.median_crossing().print();
}
}
class Triangle {
private Point a, b, c;
public Triangle(Point a_, Point b_, Point c_) {
a = a_;
b = b_;
c = c_;
}
public double square() {
// формула Герона
double ab = Point.distance(a, b);
double bc = Point.distance(b, c);
double ac = Point.distance(a, c);
double p = (ab+bc+ac)/2;
return Math.sqrt(p*(p-ab)*(p-bc)*(p-ac));
}
public double perimeter() {
double ab = Point.distance(a, b);
double bc = Point.distance(b, c);
double ac = Point.distance(a, c);
return ab + bc + ac;
}
public Point median_crossing() {
// вывод формулы тут: https://otvet.mail.ru/question/48208344
return new Point((a.x+b.x+c.x)/3, (a.y+b.y+c.y)/3);
}
public void print() {
System.out.print("A: ");
a.print();
System.out.print("B: ");
b.print();
System.out.print("C: ");
c.print();
}
}
import java.util.Scanner;
class Point {
public double x, y;
public Point(double x_, double y_) {
x = x_;
y = y_;
}
public Point() {
this(0, 0);
}
public static double distance(Point a, Point b) {
double dx = a.x - b.x;
double dy = a.y - b.y;
return Math.sqrt(dx*dx + dy*dy);
}
public void print() {
System.out.println("x: " + x + ", y: " + y);
}
public void read(Scanner scanner) {
System.out.print("x: ");
x = scanner.nextDouble();
System.out.print("y: ");
y = scanner.nextDouble();
}
}
Compiling Program...
Standard Input:
Interactive Console
Text
Program is not being debugged. Click "Debug" button to start program in debug mode.
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