ziele 10.12.20

2020-students.txt

@@ -4,5 +4,4 @@ vincent.rigter@students.fhnw.ch;marvin.tritz@students.fhnw.ch;kim.schenk@student
 BB
 alper.arslan@students.fhnw.ch;roger.syfrig@students.fhnw.ch;marco.meier5@students.fhnw.ch;marc.friedli@students.fhnw.ch;lars.zihlmann@students.fhnw.ch;joelle.hoechle@students.fhnw.ch;cedric.achermann@students.fhnw.ch;maurice.steiner@students.fhnw.ch;nicola.perrin@students.fhnw.ch;marc.bischoff@students.fhnw.ch;johnny.jordi@students.fhnw.ch;philippe.wiedmer@students.fhnw.ch;yanlung.hauser@students.fhnw.ch;joshua.hirsbrunner@students.fhnw.ch;rolf.haberstich@students.fhnw.ch;sandro.good@students.fhnw.ch;philippe.schenk@students.fhnw.ch;daniele.sentina@students.fhnw.ch;laxen.sivarajah@students.fhnw.ch;yannick.hmina@students.fhnw.ch;fabio.franz@students.fhnw.ch
 
-
-
+ 

6-cia/src/geo2d-vz.cc

@@ -15,7 +15,9 @@ class Point
                             //non default constructor
   Point(const Point& other); //copy constructor
  ~Point();                 //destructor no parameters
-  double distance(Point& other); //other is a c++ reference
+  double distance(const Point& other) const; 
+                 //|                  |--- my own variables cannot be changed
+                 //other cannot be changed
   
   static double distance(Point p,Point q);
  private:
@@ -50,14 +52,17 @@ double Point::distance(Point p,Point q) //is not a member of Point
                 //   |private
 }
 
-double Point::distance(Point& other)     //is a member of Point
+double Point::distance(const Point& other) const    //is a member of Point
                          // |----------c++ reference
 {
-/* hack
- other.xc=0;
- other.yc=0;
+/* hack 
+ other.xc=0; error
+ other.yc=0; error
 */
- 
+/* other hack 
+ xc=0; error
+ yc=0; error
+*/  
  return std::hypot(xc- other.xc,  
                    yc- other.yc);  
 } 
@@ -99,6 +104,16 @@ constructor of Point 6,8
 d=5
 destructor of Point 6,8
 destructor of Point 3,4
+*/
+
+/*
+with other as  const c++ reference
+     distance cannot change the variable of instance
+constructor of Point 3,4
+constructor of Point 6,8
+d=5
+destructor of Point 6,8
+destructor of Point 3,4
 
 */
 

ziele-bb.md

@@ -95,3 +95,10 @@
         - C++ Referenz
         - keyword ``const``
 
+## 10.12.2020 
+ - Prüfung besprechen
+ - 6-cia: Folien Seite 14-19
+    - `class Line`
+      - constructor
+      - by value vs. by reference
+

ziele-vz.md

@@ -95,5 +95,12 @@
         - pointer Referenz
         - C++ Referenz
         - keyword ``const``
-   
+ 
+## 10.12.202
+ - Prüfung besprechen
+ - 6-cia: Folien Seite 14-19
+    - `class Line`
+      - constructor
+      - by value vs. by reference
+