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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5.  
  6. class Ideone
  7. {
  8. 	public static void main (String[] args) 
  9. 	{
  10. 		double xA, yA, xB, yB, xC, yC, S; // описание переменных
  11. 		Scanner sc = new Scanner(System.in);
  12.         System.out.println("Coordinates of point A:\n"); //ввод координат вершин треугольника
  13.         xA = sc.nextDouble();
  14.         yA = sc.nextDouble();
  15.     	System.out.println("Coordinates of point B:\n");
  16.     	xB = sc.nextDouble();
  17.         yB = sc.nextDouble();
  18.     	System.out.println("Coordinates of point C:\n");
  19.     	xC = sc.nextDouble();
  20.         yC = sc.nextDouble();
  21.     	S=Math.abs((xB-xA)*(yC-yA)-(xC-xA)*(yB-yA))/2.0; //вычисление площади
  22.         System.out.printf("Square=%f",S);
  23. 	}
  24. }
Success #stdin #stdout 0.15s 321344KB
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stdin
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stdout
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Coordinates of point A:

Coordinates of point B:

Coordinates of point C:

Square=10.000000
https://ideone.com/5daeIJ
Ю1.22(Java)
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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