From d531bf0d4facfa7fbaa3e281ba79bad20b85611c Mon Sep 17 00:00:00 2001
From: "artem.didytschuk" <artem.didytschuk@gmx.de>
Date: Mon, 19 Apr 2021 10:01:44 +0200
Subject: [PATCH] Negative Zahlen implementiert im format (-#)

---
 Rechenmaschine.java | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/Rechenmaschine.java b/Rechenmaschine.java
index d3371db..4488450 100644
--- a/Rechenmaschine.java
+++ b/Rechenmaschine.java
@@ -241,7 +241,11 @@ public class Rechenmaschine {
                             currentToken.append(buchstabe);
                             state = 2;
                         }
-                        case '+', '-', '*', '/' -> {
+                        case '+', '-' -> {
+                            tokenlist.append(new Token("OPERATOR",Character.toString(buchstabe)));
+                            state = 5;
+                        }
+                        case '*', '/' -> {
                             System.out.println("Unmittelbar nach ( darf kein Operator oder ) folgen.");
                             return false;
                         }
@@ -321,7 +325,7 @@ public class Rechenmaschine {
                         state = 1;
                         break;
                     } else if( currentToken.getToken().equals("(")){
-                        state = 0;
+                        state = 2;
                         break;
                     } else if( currentToken.getToken().equals(")")){
                         state = 1;
@@ -345,11 +349,28 @@ public class Rechenmaschine {
                         return false;
                     } else if( currentToken.getToken().equals(")")) {
                         state = 1;
+                        break;
+                    } else {
+                        fehler = "Unbekanntes Token: "+currentToken.getType();
+                        return false;
+                    }
+                case 2:
+                    if( currentToken.getType().equals("OPERATOR") ) {
+                        state = 0;
+                        break;
+                    } else if( currentToken.getType().equals("OPERAND") ) {
+                        state = 1;
+                        break;
+                    } else if( currentToken.getToken().equals("(")){
+                        state = 2;
+                        break;
+                    } else if( currentToken.getToken().equals(")")){
+                        state = 1;
+                        break;
                     } else {
                         fehler = "Unbekanntes Token: "+currentToken.getType();
                         return false;
                     }
-
             }
 
             tokenlist.next();