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  1. package laba3;
  2.  
  3. public class Laba3
  4. {
  5.     public static void main(String[] args) {
  6. 	{
  7. 		double a = Math.PI/5;
  8. 		double b = 9*Math.PI/5;
  9. 		int k = 10;
  10. 		int n = 40;
  11. 		double delta = (b - a)/k;
  12. 		double e = 0.0001;
  13. 		for (double i = a; i <= b; i += delta)
  14. 		{
  15. 		double y_an, y_n, y_e, err_e, err_n;
  16.  
  17. 		y_an = f(i);
  18. 		y_n = S(i, n);
  19. 		y_e = S(i, e);
  20. 	System.out.printf("X=% 8.8f Y=% 8.8f  SN=% 8.8f SE=% 8.8f  о_погрSN=% 8.8f  о_погрSE=% 8.8f\n", i, y_an, y_n, y_e, err_e, err_n);
  21.  
  22. 		}
  23. 	}
  24.     }
  25. 	public static double f(double x) //Аналитическая формула
  26. 	{
  27. 		double y = (-Math.log(2)*Math.abs((2)*Math.sin(x/2)));
  28.  
  29. 		return y;
  30. 	}
  31.  
  32. 	public static double S(double x, int n) {
  33.         double y = 0.;
  34.         for (int i = 1; i <= n; i++) {
  35.             y += Math.cos(i * x) / (double) i;
  36.         }
  37.         return y;
  38.     }
  39.  
  40. 	public static double S(double x, double e) //Конечная сумма с погрешностью e
  41. 	{
  42. 		double y = 0;
  43. 		double y_an = f(x);
  44.  
  45. 		for (int i = 1; Math.abs(y - y_an) > e; i++)
  46. 		{
  47. 			y += (Math.acos((2*i - 1)*x))/Math.pow((2*i - 1), 2);
  48. 		}
  49. 		return y;
  50. 	}
  51. }
  52.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
Main.java:3: error: class Laba3 is public, should be declared in a file named Laba3.java
public class Laba3
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/75nAFV
language:
Java (12.0.1)
created:
7 years ago
visibility:
public

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