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  1.  
  2. import java.util.*;
  3. import java.lang.*;
  4. import java.io.*;
  5.  
  6. class Ideone
  7. {
  8. 	public static void main (String[] args)
  9. 	{
  10. 		float a, b, c;
  11.         Scanner scanner = new Scanner(System.in);
  12.         System.out.println("Enter values: ");
  13.         a = scanner.nextFloat();
  14.         b = scanner.nextFloat();
  15.         c = scanner.nextFloat();
  16.  
  17.         if (a + b >= c || b + c >= a || a + c >= b) {
  18. 			float p = (a + b + c) / 2;
  19.             float S = (float) Math.sqrt(p * (p - a) * (p - b) * (p - c));
  20.             float R = (a * b * c) / (4 * S);
  21.             float r = S/p;
  22.             System.out.println("Radius of incircle of triangle = " + r + "\nRadius of excircle of triangle = " + R);
  23.  
  24.         } else {
  25.             System.out.println("Wrong input data. Triangle doesn't exist");}
  26. 	}
  27. }
Success #stdin #stdout 0.18s 321344KB
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stdin
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7.5
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stdout
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Enter values: 
Radius of incircle of triangle = 2.450117
Radius of excircle of triangle = 6.5236096
https://ideone.com/Ix3eM7
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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