C# Algebraic Expression Automaton: TC2037.603 Project 1

main.cs

//Davide Dunne Sanchez A01642355@tec.mx
//Raúl Antonio Castillejos Santillán A01174919@tec.mx
using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;

// Listado de estados tanto en cada char como cada conjunto de chars en la cadena
enum State{
  Empty,
  Entero,
  Flotante,
  Suma,
  Resta,
  Multiplicacion,
  Division,
  Asignacion,
  Variable,
  Punto,
  AbreParentesis,
  CierraParentesis,
  Death
}

class Program{
  static public State getCharState(char c){
    State whatIsNow=State.Empty;
    if((int)c==32) whatIsNow=State.Empty;
    else if((int)c==40) whatIsNow=State.AbreParentesis;
    else if((int)c==41) whatIsNow=State.CierraParentesis;
    else if((int)c==42) whatIsNow=State.Multiplicacion;
    else if((int)c==43) whatIsNow=State.Suma;
    else if((int)c==45) whatIsNow=State.Resta;
    else if((int)c==46) whatIsNow=State.Punto;
    else if((int)c==49) whatIsNow=State.Division;
    else if((int)c>=48 && (int)c<=57) whatIsNow=State.Entero;
    else if((int)c==61) whatIsNow=State.Asignacion;
    else if((int)c>=65 && (int)c<=90) whatIsNow=State.Variable;
    else if((int)c>=97 && (int)c<=122) whatIsNow=State.Variable;
    else whatIsNow=State.Death;
    return whatIsNow;
  }

  
  static public void lexerAritmetico(string linea){
    List<Tuple<string,State>>myTable=new List<Tuple<String,State>>();
    State myState=getCharState(linea[0]);
    State whatIsNow=State.Empty;
    string currentContinuous=Char.ToString(linea[0]);
    if(linea.Length==1) myTable.Add(new Tuple<String,State>(currentContinuous,myState));
    else{
      for(int i=1;i<linea.Length;i++){
        whatIsNow=getCharState(linea[i]);
        if(whatIsNow==State.Punto && myState==State.Entero){
          currentContinuous+=linea[i];
          myState=State.Flotante;
        }
        else if(whatIsNow==State.Entero && myState==State.Flotante){
          currentContinuous+=linea[i];
        }
        else if(whatIsNow==State.Empty) continue;
        else if(whatIsNow==State.Death){
          myTable.Add(new Tuple<string,State>(currentContinuous,myState));
          myState=State.Death;
          currentContinuous=Char.ToString(linea[i]);
          myTable.Add(new Tuple<string,State>(currentContinuous,myState));
          break;
        }
        else if(whatIsNow==State.Entero && myState==State.Resta){
          currentContinuous+=linea[i];
          myState=State.Entero;
        }
        else if(whatIsNow==myState){
          currentContinuous+=linea[i];
        }
        else if(whatIsNow!=myState){
          myTable.Add(new Tuple<string,State>(currentContinuous,myState));
          currentContinuous=Char.ToString(linea[i]);
          myState=whatIsNow;
        }
      }
      myTable.Add(new Tuple<string,State>(currentContinuous,myState));
    }
    foreach(Tuple<string,State>i in myTable) Console.WriteLine(i.Item1+" "+i.Item2);
  }
  
  static void Main(){
    foreach(string line in File.ReadLines("file.txt")){
      Console.WriteLine(line);
      lexerAritmetico(line);
      Console.WriteLine();
    }
  }
}