diff -r a751aa1ee4f7 -r 7545b1bc1514 Fahad/MCG-CS/AST.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Fahad/MCG-CS/AST.cs	Wed Nov 12 12:24:26 2014 +0000
@@ -0,0 +1,160 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+
+public abstract class Statement
+{
+}
+
+public class DeclareVariable : Statement
+{
+    public string Identifier;
+    public Expression Expression;
+}
+
+public class DeclareFunction : Statement 
+{
+    public string FunctionName;
+    public DeclareVariable Parameter1;
+    public DeclareVariable Parameter2;
+    public DeclareVariable Parameter3;
+    public String ReturnType;
+    public Statement Body;
+}
+
+public class CallFunction : Statement 
+{
+    public string FunctionName;
+    public Expression Parameter1;
+    public Expression Parameter2;
+    public Expression Parameter3;
+    public Identifier ReturnVariable;
+}
+
+public class Write : Statement
+{
+    public Expression Expression;
+}
+
+public class Assignment : Statement
+{
+    public string Identifier;
+    public Expression Expression;
+}
+
+public class For : Statement
+{
+    public string Identifier;
+    public Expression From;
+    public Expression To;
+    public Statement Body;
+}
+
+public class IfThenElse : Statement
+{
+    public Expression If;
+    public Statement Then;
+    public Statement Else;
+}
+
+public class IfThen : Statement
+{
+    public Expression LeftExpression;
+    public RelationalOperands Operand;
+    public Expression RightExpression;
+    public Statement ThenBody;
+    public Statement ElseBody;
+}
+
+public class While : Statement
+{
+    public Expression LeftExpression;
+    public RelationalOperands Operand;
+    public Expression RightExpression;
+    public Statement Body;
+}
+
+public class ReadInput : Statement
+{
+    public string Identifier;
+}
+
+public class StatementSequence : Statement
+{
+    public Statement Left;
+    public Statement Right;
+}
+
+public abstract class Expression
+{
+}
+
+public class AlphaNumericValue : Expression
+{
+    public string Value;
+}
+
+public class NumericValue : Expression
+{
+    public int Value;
+}
+
+public class Identifier : Expression
+{
+    public string IdentifierName;
+}
+
+public class ArithmaticExpression : Expression
+{
+    public Expression Left;
+    public Expression Right;
+    public ArithmaticOperands Operand;
+}
+
+public enum ArithmaticOperands
+{
+    Add,
+    Subtract,
+    Multiply,
+    Division
+}
+
+public class LogicalExpression : Expression
+{
+    public Expression Left;
+    public Expression Right;
+    public LogicalOperands Operand;
+}
+
+public enum LogicalOperands
+{
+    Or,
+    And,
+    Xor,
+    Not
+}
+
+public class RelationalExpression : Expression
+{
+    public Expression Left;
+    public Expression Right;
+    public RelationalOperands Operand;
+}
+
+public class CompareVariable : Statement
+{
+    public string Identifier;
+    public Expression Expression;
+    public RelationalOperands Operand;
+}
+
+public enum RelationalOperands
+{
+    EqualTo,
+    NotEqualTo,
+    LessThan,
+    LessThanOrEqualTo,
+    GreaterThan,
+    GreaterThanOrEqualTo
+}