diff --git a/Opdracht_1/Interface.cpp b/Opdracht_1/Interface.cpp
index abceb10..2157487 100644
--- a/Opdracht_1/Interface.cpp
+++ b/Opdracht_1/Interface.cpp
@@ -1,5 +1,5 @@
 #include "Interface.h"
 
-Interface::Interface(){
+Interface::~Interface(){
     
 }
\ No newline at end of file
diff --git a/Opdracht_1/Interface.h b/Opdracht_1/Interface.h
index e0391b6..fbb415c 100644
--- a/Opdracht_1/Interface.h
+++ b/Opdracht_1/Interface.h
@@ -5,10 +5,9 @@ class Interface
 {
 private:
 public:
-Interface();
-virtual ~Interface(){};
-virtual int x() = 0;
-virtual int y() = 0;
-virtual void move(int, int) = 0;
+    virtual ~Interface();
+    virtual int x() const = 0;
+    virtual int y() const = 0;
+    virtual void move(int, int) = 0;
 };
 #endif
\ No newline at end of file
diff --git a/Opdracht_1/Positie.cpp b/Opdracht_1/Positie.cpp
index f72c8e7..a5664b9 100644
--- a/Opdracht_1/Positie.cpp
+++ b/Opdracht_1/Positie.cpp
@@ -8,11 +8,11 @@ Positie::~Positie(){
     
 }
 
-int Positie::x(){
+int Positie::x() const{
     return X;
 }
 
-int Positie::y(){
+int Positie::y() const{
     return Y;
 }
 
diff --git a/Opdracht_1/Positie.h b/Opdracht_1/Positie.h
index a736854..b3e6e61 100644
--- a/Opdracht_1/Positie.h
+++ b/Opdracht_1/Positie.h
@@ -10,8 +10,8 @@ private:
 public:
     Positie (int, int);
     ~Positie();
-    virtual int x();
-    virtual int y();
+    virtual int x() const;
+    virtual int y() const;
     virtual void move (int, int);
 };
 
diff --git a/Opdracht_1/Robot.cpp b/Opdracht_1/Robot.cpp
index 394bb79..1d82733 100644
--- a/Opdracht_1/Robot.cpp
+++ b/Opdracht_1/Robot.cpp
@@ -1,5 +1,5 @@
 #include "Robot.h"
-#include "Positie.h"
+#include "Interface.h"
 
 #include <iostream>
 
diff --git a/Opdracht_1/Robot.h b/Opdracht_1/Robot.h
index bb7dd56..9a8a04f 100644
--- a/Opdracht_1/Robot.h
+++ b/Opdracht_1/Robot.h
@@ -6,13 +6,12 @@ class Interface;
 
 class Robot{
 private:
-Interface *P;
-//Positie *P = dynamic_cast<Positie*>(I);
+    Interface *P;
 public:
     Robot (Interface*);
-    virtual ~Robot();
-    void run();
-    void show();
+    ~Robot();
+    virtual void run();
+    virtual void show();
 };
 
 #endif
\ No newline at end of file
diff --git a/Opdracht_1/class.drawio b/Opdracht_1/class.drawio
index 047a98c..bea0a17 100644
--- a/Opdracht_1/class.drawio
+++ b/Opdracht_1/class.drawio
@@ -1,42 +1,48 @@
 <mxfile host="65bd71144e">
     <diagram id="hUXen1-xG9g13vyYE9lk" name="Page-1">
-        <mxGraphModel dx="1186" dy="652" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+        <mxGraphModel dx="838" dy="517" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
             <root>
                 <mxCell id="0"/>
                 <mxCell id="1" parent="0"/>
-                <mxCell id="5" value="Positie" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=30;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                <mxCell id="5" value="Positie" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=30;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
                     <mxGeometry x="170" y="320" width="140" height="150" as="geometry"/>
                 </mxCell>
-                <mxCell id="6" value="- x : Int&lt;br&gt;- y : int" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" vertex="1" parent="5">
+                <mxCell id="6" value="- x : Int&lt;br&gt;- y : int" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" parent="5" vertex="1">
                     <mxGeometry y="30" width="140" height="30" as="geometry"/>
                 </mxCell>
-                <mxCell id="7" value="+ move (int, int)&lt;br&gt;+ x : int&lt;br&gt;+ y : int" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" vertex="1" parent="5">
+                <mxCell id="7" value="+ move (int, int)&lt;br&gt;+ x : int&lt;br&gt;+ y : int" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" parent="5" vertex="1">
                     <mxGeometry y="60" width="140" height="90" as="geometry"/>
                 </mxCell>
-                <mxCell id="9" value="Interface" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=30;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                <mxCell id="9" value="Interface" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=30;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
                     <mxGeometry x="170" y="90" width="140" height="110" as="geometry"/>
                 </mxCell>
-                <mxCell id="10" value="+ move (int, int)&lt;br&gt;+ x : int&lt;br&gt;+ y : int" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" vertex="1" parent="9">
+                <mxCell id="10" value="+ move (int, int)&lt;br&gt;+ x : int&lt;br&gt;+ y : int" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" parent="9" vertex="1">
                     <mxGeometry y="30" width="140" height="80" as="geometry"/>
                 </mxCell>
-                <mxCell id="13" value="" style="endArrow=diamondThin;endFill=0;endSize=24;html=1;" edge="1" parent="1" target="10">
+                <mxCell id="13" value="" style="endArrow=diamondThin;endFill=0;endSize=24;html=1;" parent="1" target="10" edge="1">
                     <mxGeometry width="160" relative="1" as="geometry">
                         <mxPoint x="240" y="320" as="sourcePoint"/>
                         <mxPoint x="240" y="210" as="targetPoint"/>
                     </mxGeometry>
                 </mxCell>
-                <mxCell id="16" value="Robot" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=30;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                <mxCell id="16" value="Robot" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=30;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
                     <mxGeometry x="480" y="120" width="140" height="80" as="geometry"/>
                 </mxCell>
-                <mxCell id="17" value="+ show&lt;br&gt;+ run" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" vertex="1" parent="16">
+                <mxCell id="17" value="+ show&lt;br&gt;+ run" style="text;strokeColor=none;fillColor=none;align=left;verticalAlign=middle;spacingLeft=4;spacingRight=4;overflow=hidden;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;rotatable=0;whiteSpace=wrap;html=1;" parent="16" vertex="1">
                     <mxGeometry y="30" width="140" height="50" as="geometry"/>
                 </mxCell>
-                <mxCell id="20" value="" style="endArrow=classic;html=1;exitX=0;exitY=0.5;exitDx=0;exitDy=0;entryX=1;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" target="10">
+                <mxCell id="20" value="" style="endArrow=classic;html=1;exitX=0;exitY=0.5;exitDx=0;exitDy=0;entryX=1;entryY=0.5;entryDx=0;entryDy=0;" parent="1" target="10" edge="1">
                     <mxGeometry width="50" height="50" relative="1" as="geometry">
                         <mxPoint x="480" y="160" as="sourcePoint"/>
                         <mxPoint x="425" y="120" as="targetPoint"/>
                     </mxGeometry>
                 </mxCell>
+                <mxCell id="21" value="1" style="text;html=1;align=center;verticalAlign=middle;resizable=0;points=[];autosize=1;strokeColor=none;fillColor=none;" vertex="1" parent="1">
+                    <mxGeometry x="435" y="125" width="30" height="30" as="geometry"/>
+                </mxCell>
+                <mxCell id="22" value="P" style="text;html=1;align=center;verticalAlign=middle;resizable=0;points=[];autosize=1;strokeColor=none;fillColor=none;" vertex="1" parent="1">
+                    <mxGeometry x="320" y="125" width="30" height="30" as="geometry"/>
+                </mxCell>
             </root>
         </mxGraphModel>
     </diagram>
diff --git a/Opdracht_1/main b/Opdracht_1/main
new file mode 100755
index 0000000..d94592d
Binary files /dev/null and b/Opdracht_1/main differ
diff --git a/Opdracht_2/class_1a.drawio b/Opdracht_2/class_1a.drawio
new file mode 100644
index 0000000..429406a
--- /dev/null
+++ b/Opdracht_2/class_1a.drawio
@@ -0,0 +1,268 @@
+<mxfile host="65bd71144e">
+    <diagram id="wa_eMgdYhT_LmFNCLB-G" name="Page-1">
+        <mxGraphModel dx="1604" dy="1086" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+                <mxCell id="62" value="frame" style="shape=umlFrame;whiteSpace=wrap;html=1;rounded=0;shadow=0;comic=0;labelBackgroundColor=none;strokeWidth=1;fontFamily=Verdana;fontSize=10;align=center;" vertex="1" parent="1">
+                    <mxGeometry x="15" y="10" width="820" height="1060" as="geometry"/>
+                </mxCell>
+                <mxCell id="63" style="edgeStyle=orthogonalEdgeStyle;rounded=0;html=1;dashed=1;labelBackgroundColor=none;startFill=0;endArrow=open;endFill=0;endSize=10;fontFamily=Verdana;fontSize=10;" edge="1" parent="1" source="65" target="95">
+                    <mxGeometry relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="590" y="721"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="64" style="edgeStyle=orthogonalEdgeStyle;rounded=0;html=1;dashed=1;labelBackgroundColor=none;startFill=0;endArrow=open;endFill=0;endSize=10;fontFamily=Verdana;fontSize=10;" edge="1" parent="1" source="65" target="84">
+                    <mxGeometry relative="1" as="geometry">
+                        <Array as="points"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="65" value="Classname" style="swimlane;html=1;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=26;fillColor=none;horizontalStack=0;resizeParent=1;resizeLast=0;collapsible=1;marginBottom=0;swimlaneFillColor=#ffffff;rounded=0;shadow=0;comic=0;labelBackgroundColor=none;strokeWidth=1;fontFamily=Verdana;fontSize=10;align=center;" vertex="1" parent="1">
+                    <mxGeometry x="650" y="628" width="160" height="186" as="geometry"/>
+                </mxCell>
+                <mxCell id="66" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="65">
+                    <mxGeometry y="26" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="67" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="65">
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+                </mxCell>
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+                </mxCell>
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+                </mxCell>
+                <mxCell id="70" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="65">
+                    <mxGeometry y="130" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="71" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="65">
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+                </mxCell>
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+                </mxCell>
+                <mxCell id="73" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="72">
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+                </mxCell>
+                <mxCell id="74" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="72">
+                    <mxGeometry y="52" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="75" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="72">
+                    <mxGeometry y="78" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="76" value="Classname" style="swimlane;html=1;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=26;fillColor=none;horizontalStack=0;resizeParent=1;resizeLast=0;collapsible=1;marginBottom=0;swimlaneFillColor=#ffffff;rounded=0;shadow=0;comic=0;labelBackgroundColor=none;strokeWidth=1;fontFamily=Verdana;fontSize=10;align=center;" vertex="1" parent="1">
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+                </mxCell>
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+                </mxCell>
+                <mxCell id="78" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="76">
+                    <mxGeometry y="52" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="79" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="76">
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+                </mxCell>
+                <mxCell id="80" value="Classname" style="swimlane;html=1;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=26;fillColor=none;horizontalStack=0;resizeParent=1;resizeLast=0;collapsible=1;marginBottom=0;swimlaneFillColor=#ffffff;rounded=0;shadow=0;comic=0;labelBackgroundColor=none;strokeWidth=1;fontFamily=Verdana;fontSize=10;align=center;" vertex="1" parent="1">
+                    <mxGeometry x="650" y="978" width="160" height="83" as="geometry"/>
+                </mxCell>
+                <mxCell id="81" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="80">
+                    <mxGeometry y="26" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="82" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="80">
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+                </mxCell>
+                <mxCell id="83" style="edgeStyle=orthogonalEdgeStyle;rounded=0;html=1;dashed=1;labelBackgroundColor=none;startFill=0;endArrow=open;endFill=0;endSize=10;fontFamily=Verdana;fontSize=10;" edge="1" parent="1" source="84" target="80">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="84" value="Classname" style="swimlane;html=1;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=26;fillColor=none;horizontalStack=0;resizeParent=1;resizeLast=0;collapsible=1;marginBottom=0;swimlaneFillColor=#ffffff;rounded=0;shadow=0;comic=0;labelBackgroundColor=none;strokeWidth=1;fontFamily=Verdana;fontSize=10;align=center;" vertex="1" parent="1">
+                    <mxGeometry x="650" y="838" width="160" height="110" as="geometry"/>
+                </mxCell>
+                <mxCell id="85" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="84">
+                    <mxGeometry y="26" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="86" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="84">
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+                </mxCell>
+                <mxCell id="87" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="84">
+                    <mxGeometry y="78" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="88" style="edgeStyle=orthogonalEdgeStyle;rounded=0;html=1;dashed=1;labelBackgroundColor=none;startFill=0;endArrow=open;endFill=0;endSize=10;fontFamily=Verdana;fontSize=10;" edge="1" parent="1" source="89" target="65">
+                    <mxGeometry relative="1" as="geometry">
+                        <Array as="points"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="89" value="Classname" style="swimlane;html=1;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=26;fillColor=none;horizontalStack=0;resizeParent=1;resizeLast=0;collapsible=1;marginBottom=0;swimlaneFillColor=#ffffff;rounded=0;shadow=0;comic=0;labelBackgroundColor=none;strokeWidth=1;fontFamily=Verdana;fontSize=10;align=center;" vertex="1" parent="1">
+                    <mxGeometry x="650" y="520" width="160" height="83" as="geometry"/>
+                </mxCell>
+                <mxCell id="90" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="89">
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+                </mxCell>
+                <mxCell id="91" value="+ field: type" style="text;html=1;strokeColor=none;fillColor=none;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;whiteSpace=wrap;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;" vertex="1" parent="89">
+                    <mxGeometry y="52" width="160" height="26" as="geometry"/>
+                </mxCell>
+                <mxCell id="92" value="&amp;laquo;interface&amp;raquo;&lt;br&gt;&lt;b&gt;Name&lt;/b&gt;" style="html=1;rounded=0;shadow=0;comic=0;labelBackgroundColor=none;strokeWidth=1;fontFamily=Verdana;fontSize=10;align=center;" vertex="1" parent="1">
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diff --git a/Opdracht_2/main.cpp b/Opdracht_2/main.cpp
new file mode 100644
index 0000000..e69de29