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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Quaternion {
  6. 	private double a;
  7. 	private double b;
  8. 	private double c;
  9. 	private double d;
  10.  
  11. 	public Quaternion() {
  12. 		a = 0;
  13. 		b = 0;
  14. 		c = 0;
  15. 		d = 0;
  16. 	}
  17. 	public Quaternion(double a) {
  18. 		this.a = a;
  19. 		b = 0;
  20. 		c = 0;
  21. 		d = 0;
  22. 	}
  23. 	public Quaternion(double a, double b, double c, double d) {
  24. 		this.a = a;
  25. 		this.b = b;
  26. 		this.c = c;
  27. 		this.d = d;
  28. 	}
  29.  
  30. 	public Quaternion conjug() {
  31. 		return new Quaternion(a, -b, -c, -d);
  32. 	}
  33. 	public double abs() {
  34. 		return Math.sqrt(a * a  + b * b + c * c + d * d);
  35. 	}
  36. 	public Quaternion inverse() throws ArithmeticException {
  37. 		return Quaternion.divide(this.conjug(), this.abs() * this.abs());
  38. 	}
  39. 	public boolean isZero() {
  40. 		return (a == 0 && b == 0 && c == 0 && d == 0);
  41. 	}
  42.  
  43. 	public static Quaternion sum(Quaternion a, Quaternion b) {
  44. 		return new Quaternion(a.a + b.a, a.b + b.b, a.c + b.c, a.d + b.d);
  45. 	}
  46. 	public static Quaternion sub(Quaternion a, Quaternion b) {
  47. 		return new Quaternion(a.a - b.a, a.b - b.b, a.c - b.c, a.d - b.d);
  48. 	}
  49. 	public static Quaternion mul(Quaternion a, double mult) {
  50. 		return new Quaternion(a.a * mult, a.b * mult, a.c * mult, a.d * mult);
  51. 	}
  52. 	public static Quaternion mul(Quaternion a, Quaternion b) {
  53. 		return new Quaternion(a.a * b.a - a.b * b.b - a.c * b.c - a.d * b.d,
  54. 							  a.a * b.b + a.b * b.a + a.c * b.d - a.d * b.c,
  55. 							  a.a * b.c - a.b * b.d + a.c * b.a + a.d * b.b,
  56. 							  a.a * b.d + a.b * b.c - a.c * b.b + a.d * b.a);
  57. 	}
  58. 	public static Quaternion divide(Quaternion a, double divider) throws ArithmeticException {
  59. 		if (divider == 0) throw new ArithmeticException("Zero divider");
  60. 		return new Quaternion(a.a / divider, a.b / divider, a.c / divider, a.d / divider);
  61. 	}
  62. 	public static Quaternion divide(Quaternion a, Quaternion b) throws ArithmeticException {
  63. 		if (b.isZero()) throw new ArithmeticException("Zero divider");
  64. 		return Quaternion.mul(a, b.inverse());
  65. 	}
  66.  
  67. 	public String toString() {
  68. 		return new String(a +
  69. 						  ((b < 0)? " - " : " + ") + Math.abs(b) + "*i" +
  70. 						  ((c < 0)? " - " : " + ") + Math.abs(c) + "*j" +
  71. 						  ((d < 0)? " - " : " + ") + Math.abs(d) + "*k\n");
  72. 	}
  73. }
  74. class Main {
  75. 	public static void main (String[] args) {
  76. 		Quaternion qt1 = new Quaternion();
  77. 		Quaternion qt2 = new Quaternion(5);
  78. 		Quaternion qt3 = new Quaternion(1, 2, 3, 4);
  79. 		Quaternion qt4 = new Quaternion(0.1, 1.4, -2.5, -1.7);
  80. 		if (!qt1.isZero()) {
  81. 			System.out.print(Quaternion.sum(qt3, qt4));
  82. 		} else {
  83. 			System.out.print(Quaternion.mul(qt3, qt4));
  84. 		}
  85. 		do {
  86. 			qt2 = Quaternion.sub(qt2, qt3);
  87. 			System.out.print(qt2);
  88. 			System.out.print(qt2.conjug());
  89. 			System.out.print(qt2.inverse());
  90. 		} while (qt2.isZero());
  91. 		try {
  92. 			System.out.print(Quaternion.divide(qt3, qt4));
  93. 		} catch (ArithmeticException e) {
  94. 			System.out.print(e.getMessage());
  95. 		}
  96. 		System.out.print(Quaternion.mul(qt3, 17.2));
  97. 	}
  98. }
Success #stdin #stdout 0.11s 320576KB
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stdin
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Standard input is empty
stdout
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11.600000000000001 + 6.5*i + 6.8*j - 10.499999999999998*k
4.0 - 2.0*i - 3.0*j - 4.0*k
4.0 + 2.0*i + 3.0*j + 4.0*k
0.08888888888888888 + 0.04444444444444444*i + 0.06666666666666665*j + 0.08888888888888888*k
-1.026102610261026 - 0.5490549054905489*i - 0.5580558055805579*j + 1.017101710171017*k
17.2 + 34.4*i + 51.599999999999994*j + 68.8*k
https://ideone.com/2HXzqt
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
secret

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