29. Aban

Gerade.java

@@ -12,6 +12,15 @@ public class Gerade
     public Gerade( Punkt p1, Punkt p2)
     {
         m = (p2.y -p1.y) / (p2.x - p1.x);
-        c = p1.y - m* p1.x;
+        c = p1.y - m * p1.x;
+    }
+    public Punkt schneide(Gerade g2){
+        double x = (g2.c - c) / (m - g2.m);
+        
+        double y = m * x + c;
+        return new Punkt(x, y);
+    }
+    public String toString() {
+        return "y = " + m + " * x + " + c;
     }
 }

Person.java

@@ -0,0 +1,7 @@
+
+
+public class Person
+{
+  String vorname;
+  String nachname;
+}

Punkt.java

@@ -8,4 +8,8 @@ public class Punkt
         x = _x;
         y = _y;
     }
+    public String toString() {
+        return "(" + x + "| " + y + " )";
+        
+    }
 }

Schueler.java

@@ -0,0 +1,7 @@
+
+
+public class Schueler extends Person
+{
+    int klasse;
+   
+}

Test.java

@@ -0,0 +1,18 @@
+
+public class Test
+{
+    public static void test() {
+        Punkt P = new Punkt(1, -1);
+        Punkt Q = new Punkt(3, 3);
+        
+        Gerade g = new Gerade (P, Q);
+        System.out.println("Gerade g:");
+        System.out.println(g);
+        
+        Gerade h = new Gerade(-0.5, 2);
+        
+        Punkt S = g.schneide(h);
+        System.out.println("Schnittpunkt:");
+        System.out.println(S);
+    }
+}