Update Parserv3.h

Parserv3.h

@@ -11,13 +11,20 @@ class Relation
 {
 	string name;
 	
-	public:
+	Relation(string str)
+	{
+		name = str;
+	}
 	
+	void setRelation(string str)
+	{
+		name = str;
+	}	
 	string getName()
 	{
 		return name;
 	}
-}
+};
 
 
 
@@ -36,7 +43,7 @@ class Union
 	{
 		return "Union of " + Un1 + " and " + Un2;
 	}
-}
+};
 
 class Product
 {
@@ -53,9 +60,9 @@ class Product
 	{
 		return "Product of " + Pr1 + " and " + Pr2;
 	}
-}
+};
 
-class Difference()
+class Difference
 {
 	string D1;
 	string D2;
@@ -70,14 +77,14 @@ class Difference()
 	{
 		return "Difference of " + D1 + " and " + D2;
 	}
-}
+};
 
-class Rename()
+class Renaming
 {
 	string newName;
 	string oldName;
 	
-	Rename(string s1, string s2)
+	Renaming(string s1, string s2)
 	{
 		newName = s1;
 		oldName = s2;
@@ -87,29 +94,35 @@ class Rename()
 	{
 		return "Renaming " + oldName + " to " + newName;
 	}
-}
+};
 
-class Projection()
+class Projection
 {
 	string newName;
 	string oldName;
 	
-	Rename(string s1, string s2)
+	Projection(string s1, string s2)
 	{
 		newName = s1;
 		oldName = s2;
 	}
 	
-	string doRename()
+	string doProjection()
 	{
 		return "Projecting " + oldName + " onto " + newName;
 	}
-}
+};
 
-class Operand()
+class Operand
 {
 	string op;
 	
+	public:
+	
+		Operand()
+		{
+		}
+		
 		Operand(string str)
 		{
 			op = str;
@@ -124,12 +137,17 @@ class Operand()
 		{
 			return op;
 		}
-}
+};
 
-class Op()
+class Op
 {
 	string op;
 	
+	public: 
+		Op()
+		{
+		}
+		
 		Op(string str)
 		{
 			op = str;
@@ -144,14 +162,16 @@ class Op()
 		{
 			return op;
 		}
-}
+};
 
-class Comparison()
+class Comparison
 {
 	Op op;
 	Operand operand1;
 	Operand operand2;
 	
+	public:
+	
 		Comparison(string str1, string str2, string str3)
 		{
 			operand1.setOperand(str1);
@@ -168,14 +188,14 @@ class Comparison()
 		
 		string getComparison()
 		{
-		return op1.getOperand() + " " + op.getOp() + " " + op2.getOperand();
+			return operand1.getOperand() + " " + op.getOp() + " " + operand2.getOperand();
 		}
-}
+};
 
-class Conjunction()
+class Conjunction
 {
 	string conj;
-	
+	public:
 		Conjunction(string str)
 		{
 			conj = str;
@@ -190,12 +210,12 @@ class Conjunction()
 		{
 			return conj;
 		}
-}
+};
 
-class Condition()
+class Condition
 {
 	string cond;
-	
+	public:
 		Condition(string str)
 		{
 			cond = str;
@@ -210,12 +230,12 @@ class Condition()
 		{
 			return cond;
 		}
-}
+};
 
-class Selection()
+class Selection
 {
 	string select;
-	
+	public:
 		Selection(string str)
 		{
 			select = str;
@@ -225,18 +245,4 @@ class Selection()
 		{
 			return select;
 		}
-}
+};
-
-class expr
-{
-	Relation r;
-	
-	selection
-    projection
-    renaming
-	Union
-	difference
-    product
-
-}
-