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Javakurs/Übungsaufgaben/Fibonacci/Musterlösung
2012-03-08T19:24:32Z
<p>188.103.97.116: </p>
<hr />
<div><pre><br />
public class FibonacciNumbers {<br />
<br />
public static void main(String args[]) {<br />
<br />
printfibonacci(-1, 8);<br />
}<br />
<br />
<br />
/*outputs fibonacci numbers from argument one to argument two*/<br />
public static void printfibonacci( int start, int end ) {<br />
<br />
for( int i= start; i < end; i++ ) {<br />
<br />
System.out.println( "fibonacci("+ i +") = "+ fibonacci(i) );<br />
}<br />
}<br />
<br />
/* calculates a fibonacci number of n */<br />
public static int fibonacci( int n ) { <br />
<br />
if ( 0 == n ) {<br />
return 0;<br />
}<br />
<br />
if ( 1 == n ) {<br />
return 1;<br />
}<br />
<br />
if (n > 1) {<br />
return fibonacci( n-1 ) + fibonacci( n-2 );<br />
} else {<br />
System.out.println ( "Error! Fibonacci undefined for negativ "+<br />
"values");<br />
return -1;<br />
}<br />
}<br />
<br />
}<br />
</pre><br />
<br />
Alternative Lösung<br />
<pre><br />
<br />
<br />
<br />
public class Fibonacci {<br />
<br />
<br />
public static void main(String[] args) {<br />
<br />
System.out.print(fibonacci(5));<br />
}<br />
public static int fibonacci(int n){<br />
if (n<0){<br />
System.out.print("Du hast eine negative Zahl eingegeben:");<br />
}else{<br />
if(n>1){<br />
n = fibonacci(n-1) + fibonacci(n-2); <br />
}}<br />
return n;<br />
}<br />
}<br />
<br />
</pre></div>
188.103.97.116