Hi,
I am developing a TM simulation program. But got stuck in execution as it goes wrong. The Code is the follwing.
1. Java Code
import java.io.IOException;
public class TMSimulation{
public static void main(String args[]) throws IOException{
InputReader reader=new InputReader();
reader.tmFileNamereader();
reader.tmFileReader();
//fileReader.display(anArray)
}
}import java.io.*;
public class InputReader{
private String tmFileName;
private String inputString;
public InputReader(){
System.out.println("Welcome To The Turing Machine Simulation Program");
System.out.println("Please Enter The input as described");
}
public String tmFileNamereader() throws IOException{
BufferedReader myReader=new BufferedReader(new InputStreamReader(System.in));
System.out.println("The file name with extension which contains the TM code");
this.tmFileName=myReader.readLine();
return(this.tmFileName);
}
public String inputStringReader() throws IOException{
BufferedReader myReader=new BufferedReader(new InputStreamReader(System.in));
System.out.println("The input string you want to run on the TM");
this.inputString=myReader.readLine();
return (this.inputString);
}
public void tmFileReader() throws IOException{
SimulationWork sw=new SimulationWork();
FileInputStream fstream = new FileInputStream(this.tmFileName);
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
//Read File Line By Line
while ((strLine = br.readLine()) != null) {
// Print the content on the console
// System.out.println (i+"--index--"+strLine);
sw.simulateTM(strLine);
}
in.close();
}
}import java.io.IOException;
public class SimulationWork{
private String inputString;
private char currentState;
private char endState;
private char readSymbol;
private char writeSymbol;
private char direction;
private char prevEndState;
private int prevTapeHead;
private int tapHeadPosition;
//private int i=0;
public SimulationWork() throws IOException{
this.inputString=new InputReader().inputStringReader();
prevEndState='1';
prevTapeHead=0;
tapHeadPosition=0;
}
public void simulateTM(String tmCodeLine){
currentState=tmCodeLine.charAt(1);
endState=tmCodeLine.charAt(5);
readSymbol=tmCodeLine.charAt(3);
writeSymbol=tmCodeLine.charAt(7);
direction=tmCodeLine.charAt(9);
if(prevTapeHead==-1){
System.out.println("The Machine is Crashed");
}
else if(endState=='2'){
System.out.println("Machine is Halted at state:---"+endState);
}
else if(currentState==prevEndState){
if(readSymbol==inputString.charAt(tapHeadPosition)&& direction=='R'){
char[]anArray=inputString.toCharArray();
anArray[tapHeadPosition]=writeSymbol;
prevTapeHead=tapHeadPosition++;
prevEndState=endState;
inputString=String.copyValueOf(anArray);
System.out.println(currentState+"--"+inputString+"--"+tapHeadPosition);
}
else if(readSymbol==inputString.charAt(tapHeadPosition)&& direction=='L'){
char[]anArray=inputString.toCharArray();
anArray[tapHeadPosition]=writeSymbol;
prevTapeHead=tapHeadPosition--;
prevEndState=endState;
inputString=String.copyValueOf(anArray);
System.out.println(currentState+"--"+inputString+"--"+tapHeadPosition);
}
else{
System.out.println("Your Input was incorrect");
}
}
}
}2.. Sample file for TM Code (Increment TM)
(1,$,3,$,R)
(3,0,3,0,R)
(3,1,3,1,R)
(3,#,4,#,L)
(4,1,4,0,L)
(4,0,2,1,R)Thanks very much for help in advance