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  1. // import java.util.Scanner;
  2.  
  3. public abstract class Funktion {
  4.  
  5. 	/**
  6. 	 * @param args
  7. 	 */
  8. 	double xmin, xmax, abstand;
  9. 	public abstract double f(double x);
  10. 	public abstract double g(double x);
  11. 	public void tabelle () {
  12.  
  13. 		for (double x = xmin; x <= xmax; x = x + abstand) {
  14. 			System.out.println("f(" + java.lang.Math.round( x * 100 ) / 100. + ") = " + f(x));
  15. 			}
  16. 		} 
  17.  
  18. 	public void newton (double s) { 	}
  19. }
  20.  
  21. class Parabel extends Funktion {
  22.  
  23. 	int a, b, c;
  24. 	double xmin, xmax, abstand;
  25.  
  26. 	public double f(double x) {
  27. 		//return x*x*a+b*x+c;
  28. 		return x*x*x*a + b*x*x + c*x + 30;
  29. 	}
  30.  
  31. 	public double g(double x) {
  32. 		return 2*a*x+b;
  33. 	}
  34.  
  35. 	Parabel(double xmin,double xmax,double abstand, int a, int b, int c) {
  36. 		// Funktion.xmin = this.xmin;
  37. 		this.xmin = xmin;
  38. 		this.xmax = xmax;
  39. 		this.abstand = abstand;
  40. 		this.a = a;
  41. 		this.b = b;
  42. 		this.c = c;
  43. 		/*Funktion.xmin = this.xmin;
  44. 		Funktion.xmax = this.xmax;
  45. 		Funktion.abstand = this.abstand;*/
  46. 	}
  47.  
  48. 	public static void main(String[] args) {
  49.  
  50. 		Parabel para = new Parabel(1.0,2.0,0.1,2,-20,-6);
  51. 		para.tabelle();
  52.  
  53. 	}
  54. }
  55.  
  56.  
  57.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:3: error: class Funktion is public, should be declared in a file named Funktion.java
public abstract class Funktion {
                ^
1 error
stdout
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Standard output is empty
https://ideone.com/vMaNPp
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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