X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=an_faculteit.tex;h=59fd9214cb5cbdf928d1e196b7c3f06e8e834726;hb=d5eb78db13b8b04fdf0a3edf3e636dd9006948af;hp=ae9178f5bda6180f04eda724efdaf869e8796283;hpb=eaf490e7216d0dc1a16a1b407b19931d29a2bec3;p=sec1415.git

diff --git a/an_faculteit.tex b/an_faculteit.tex
index ae9178f..59fd921 100644
--- a/an_faculteit.tex
+++ b/an_faculteit.tex
@@ -14,7 +14,7 @@ do (
 
 In \textit{Piet} ziet dit er als volgt uit...
 \begin{lstlisting}[title=Faculteit in \textit{Piet'}]
-push 5      // x:=5
+push 10     // x:=5
 push 1      // y:=1
 
 MARKERING A:
@@ -60,13 +60,11 @@ push 4      //
 push 1      //
 roll        //
 mul         // x*y
-push 3      // Ass(2)
-push 2
-roll
-pop
-push 2
+push 2      // Ass(1)
 push 1
 roll
+pop
+
             // x:=x-1
 push 2      // Un(2)
 push 1
@@ -80,8 +78,54 @@ roll
 push 1      // 
 sub         // x-1
 push 3      // Ass(2)
+push 2
+roll 
+pop
+push 2
 push 1
 roll
-pop         
             // nu gaat het programma weer via een wit pad naar markering A
 \end{lstlisting}
+
+Wat in piet er uit zit als in \ref{fig:img3}
+\begin{figure}[H]
+	\caption{Factulteit vanuit \textit{While} naar \textit{Piet}}
+	\label{fig:img3}
+	\centering
+	\fbox{\includegraphics[natheight=320px, natwidth=256px, height=320px,
+	width=256px]{img3.png}}
+\end{figure}
+
+\begin{landscape}
+De afleidingsrij voor 1! ziet er als volgt uit:\\
+$
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1;push \: 3;dup;roll;push \: 1;push \: 2;push \: 1;push \: 1, [\:], [\:], [\:]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1;push \: 3;dup;roll;push \: 1;push \: 2;push \: 1, [\:], [\:], [1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1;push \: 3;dup;roll;push \: 1;push \: 2, [\:], [\:], [1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1;push \: 3;dup;roll;push \: 1, [\:], [\:], [2,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1;push \: 3;dup;roll, [\:], [\:], [1,2,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1;push \: 3;dup, [\:], [\:], [1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1;push \: 3, [\:], [\:], [1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll;push \: 1, [\:], [\:], [3,1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1;roll, [\:], [\:], [1,3,1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;push \: 1, [\:], [\:], [1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not;subtract;, [\:], [\:], [1,1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1;not, [\:], [\:], [1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1;push \: 1, [\:], [\:], [1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract;push\:1, [\:], [\:], [1,1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater;subtract, [\:], [\:], [1,1,1,1,1]\rangle \Rightarrow\\
+\langle pointer; not;greater, [\:], [\:], [0,1,1,1]\rangle \Rightarrow\\
+\langle pointer; not, [\:], [\:], [1,1,1]\rangle \Rightarrow\\
+\langle pointer [\:], [\:], [0,1,1]\rangle \Rightarrow\\
+\langle [\:], [\:], [1,1]\rangle\\
+\\
+$
+Eerst worden x en y op de stack gestopt zodat de stack [y,x] = [1,1]. 
+Deze stack is gelijk aan de stack in de termineerende configuratie: 1 = 1! dus y = x!.
+Als bewijs dat de wiskundige operaties op de stack goed zijn uitgevoerd staat in 
+de appendix onder het kopje voorbeelden een stukje code.  In het programma 
+eenfaculteit worden alle wiskundige operaties die bij de commando's horen 
+achter elkaar uitgevoerd op de stack, waarbij het resultaat [1,1] is.\\
+Bij de voorbeelden staan ook nog de programma's tweefaculteit en 
+vijffaculteit die respectievelijk 2! en 5! uitrekenen.
+\end{landscape}
\ No newline at end of file