Merge branch 'master' of /Users/ernestoestrada/IdeaProjects/PPL-Fall-2018 with conflicts.

Corgi/Lexer.java

@@ -50,8 +50,7 @@ public class Lexer {
 // System.out.println("current symbol: " + sym + " state = " + state );
 
             if ( state == 1 ) {
-               if ( sym == 9 || sym == 10 || sym == 13 ||
+               if ( sym == 9 || sym == 10 || sym == 13 || sym == 32 ) {// whitespace
-                    sym == 32 ) {// whitespace
                   state = 1;
                }
                else if ( 'a'<=sym && sym<='z' ) {// lowercase

Corgi/Node.java

@@ -137,12 +137,7 @@ System.out.println("has " + number + " children");
    public void execute() {
 
       if ( kind.equals("stmts") ) {
-         if ( first != null ) {
+          // insert code here for Exercise 15
-            first.execute();
-            if ( second != null ) {
-               second.execute();
-            }
-         }
       }
 
       else if ( kind.equals("prtstr") ) {
@@ -150,8 +145,7 @@ System.out.println("has " + number + " children");
       }
       
       else if ( kind.equals("prtexp") ) {
-         double value = first.evaluate();
+          // insert code here for Exercise 15
-         System.out.print( value );
       }
       
       else if ( kind.equals("nl") ) {
@@ -159,8 +153,7 @@ System.out.println("has " + number + " children");
       }
       
       else if ( kind.equals("sto") ) {
-         double value = first.evaluate();
+          // insert code here for Exercise 15
-         table.store( info, value );
       }
       
       else {
@@ -177,25 +170,25 @@ System.out.println("has " + number + " children");
       }
 
       else if ( kind.equals("var") ) {
-         return table.retrieve( info );
+          return table.retrieve( info );
       }
 
       else if ( kind.equals("+") || kind.equals("-") ) {
-         double value1 = first.evaluate();
+          double val1 = first.evaluate();
-         double value2 = second.evaluate();
+          double val2 = second.evaluate();
-         if ( kind.equals("+") )
+          if (kind.equals("+"))
-            return value1 + value2;
+              return val1 + val2;
-         else
+          else
-            return value1 - value2;
+              return val1 - val2;
       }
 
       else if ( kind.equals("*") || kind.equals("/") ) {
-         double value1 = first.evaluate();
+          double val1 = first.evaluate();
-         double value2 = second.evaluate();
+          double val2 = second.evaluate();
-         if ( kind.equals("*") )
+          if (kind.equals("*"))
-            return value1 * value2;
+              return val1 * val2;
-         else
+          else
-            return value1 / value2;
+              return val1 / val2;
        }
  
        else if ( kind.equals("input") ) {
@@ -219,25 +212,24 @@ System.out.println("has " + number + " children");
              error("unknown function name [" + kind + "]");
              return 0;
           }
-            
        }
        
        else if ( kind.equals("pow") ) {
-          double value1 = first.evaluate();
+           double val1 = first.evaluate();
-          double value2 = second.evaluate();
+           double val2 = second.evaluate();
-          return Math.pow( value1, value2 );
+           return Math.pow(val1, val2);
        }
 
        else if ( kind.equals("opp") ) {
-          double value = first.evaluate();
+           double val = first.evaluate();
-          return -value;
+           return -val;
        }
 
        else {
           error("Unknown node kind [" + kind + "]");
           return 0;
        }
-       
+
    }// evaluate
 
 }// Node

Corgi/Parser.java

@@ -179,14 +179,13 @@ public class Parser {
       
    }// <factor>
 
-  // check whether token is correct kind
+   //private Node parseFuncDefs() {}
-  private void errorCheck( Token token, String kind ) {
+
-    if( ! token.isKind( kind ) ) {
+   //private Node parseFuncDef() {}
-      System.out.println("Error:  expected " + token + 
+
-                         " to be of kind " + kind );
+   //private Node parseParams() {}
-      System.exit(1);
+
-    }
+   //private Node parseArgs() {}
-  }
 
   // check whether token is correct kind and details
   private void errorCheck( Token token, String kind, String details ) {

Corgi/partialNode.txt

@@ -0,0 +1,87 @@
+  // ask this node to execute itself
+  // (for nodes that don't return a value)
+   public void execute() {
+
+      if ( kind.equals("stmts") ) {
+          // insert code here for Exercise 15
+      }
+
+      else if ( kind.equals("prtstr") ) {
+         System.out.print( info );
+      }
+      
+      else if ( kind.equals("prtexp") ) {
+          // insert code here for Exercise 15
+      }
+      
+      else if ( kind.equals("nl") ) {
+         System.out.print( "\n" );
+      }
+      
+      else if ( kind.equals("sto") ) {
+          // insert code here for Exercise 15
+      }
+      
+      else {
+         error("Unknown kind of node [" + kind + "]");     
+      }
+
+   }// execute
+    
+   // compute and return value produced by this node
+   public double evaluate() {
+
+      if ( kind.equals("num") ) {
+         return Double.parseDouble( info );
+      }
+
+      else if ( kind.equals("var") ) {
+          // insert code here for Exercise 15
+      }
+
+      else if ( kind.equals("+") || kind.equals("-") ) {
+          // insert code here for Exercise 15
+      }
+
+      else if ( kind.equals("*") || kind.equals("/") ) {
+          // insert code here for Exercise 15
+       }
+ 
+       else if ( kind.equals("input") ) {
+          return keys.nextDouble();          
+       }
+       
+       else if ( kind.equals("sqrt") || kind.equals("cos") ||
+                 kind.equals("sin") || kind.equals("atan")    
+               ) {
+          double value = first.evaluate();
+
+          if ( kind.equals("sqrt") )
+             return Math.sqrt(value);
+          else if ( kind.equals("cos") )
+             return Math.cos( Math.toRadians( value ) );
+          else if ( kind.equals("sin") )
+             return Math.sin( Math.toRadians( value ) );
+          else if ( kind.equals("atan") )
+             return Math.toDegrees( Math.atan( value ) );
+          else {
+             error("unknown function name [" + kind + "]");
+             return 0;
+          }
+            
+       }
+       
+       else if ( kind.equals("pow") ) {
+          // insert code here for Exercise 15
+       }
+
+       else if ( kind.equals("opp") ) {
+          // insert code here for Exercise 15
+       }
+
+       else {
+          error("Unknown node kind [" + kind + "]");
+          return 0;
+       }
+       
+   }// evaluate