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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		double alfa = 2.0;
  13. 		double beta = 18.0;
  14.  
  15. 		double resultValueOne = valueOne(alfa, beta);
  16.  
  17. 		alfa = 0.0;
  18. 		double resultValueTwo = valueTwo(alfa, beta);
  19.  
  20. 		if(Double.isNaN(resultValueOne))
  21. 		{
  22. 		    System.out.println("No resultValueOne");
  23. 		}
  24. 		if(Double.isNaN(resultValueTwo))
  25. 		{
  26. 		    System.out.println("No resultValueTwo");
  27. 		}
  28. 	}
  29.  
  30. 	public static double valueOne(double alfa, double beta)
  31. 	{
  32. 	    // At least one of the values is invalid.
  33. 	    if (Double.isNaN(alfa) || Double.isNaN(beta))
  34. 	    {
  35. 	        return Double.NaN;
  36. 	    }
  37.  
  38. 	    // Check the alpha or otherwise a div/0 exception may be thrown.
  39. 	    if (alfa == 0.0)
  40. 	    {
  41. 	        return Double.NaN;
  42. 	    }
  43.  
  44. 	    double divResult = (-beta)/alfa;
  45.  
  46. 	    // Check the div result because Math.sqrt accepts only positive values:
  47. 	    // If the argument is NaN or less than zero, the result is NaN. 
  48. 	    if (divResult < 0.0)
  49. 	    {
  50. 	        return Double.NaN;
  51. 	    }
  52.  
  53. 	    return (-(Math.sqrt(divResult)))+alfa;
  54. 	}
  55.  
  56. 	public static double valueTwo(double alfa, double beta)
  57. 	{
  58. 	    // At least one of the values is invalid.
  59. 	    if (Double.isNaN(alfa) || Double.isNaN(beta))
  60. 	    {
  61. 	        return Double.NaN;
  62. 	    }
  63.  
  64. 	    // Check the alpha or otherwise a div/0 exception may be thrown.
  65. 	    if (alfa == 0.0)
  66. 	    {
  67. 	        return Double.NaN;
  68. 	    }
  69.  
  70. 	    double divResult = (-beta)/alfa;
  71.  
  72. 	    // Check the div result because Math.sqrt accepts only positive values:
  73. 	    // If the argument is NaN or less than zero, the result is NaN. 
  74. 	    if (divResult < 0.0)
  75. 	    {
  76. 	        return Double.NaN;
  77. 	    }
  78.  
  79. 	    return ((Math.sqrt(divResult)))+alfa;
  80. 	}
  81. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin 
Standard input is empty
stdout 
No resultValueOne
No resultValueTwo
https://ideone.com/cJQN9T
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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