all compilation errors are gone. Function Types are properly entering Symbol Table. Some Type checking is taking place among expressions.

src/symbol_table.c

@@ -316,19 +316,25 @@ SymbolTable* init(SymbolTable* start){
 	return start;
 }
 	
-TableNode* CreateEntry(SymbolTable* table, char* typeOf, char* id, AdInfo* ad) {
+TableNode* CreateEntry(SymbolTable* table, TableNode* typeOf, char* id, AdInfo* ad) {
 
 if(table ==NULL){
         printf("Null reference to table");
         return NULL;
 }
+/*
 TableNode* topDef = (table_lookup(getAncestor(table),typeOf));
 if(topDef == NULL){
 	printf("This type is not defined at the top level\n");
 	return NULL;
+}
+*/
+if(typeOf == NULL){
+	printf("This is not pointing to a proper definition\n");
+	return NULL;
 }
   TableNode* newEntry = (TableNode*)malloc(sizeof(TableNode));
-  newEntry->theType = topDef;
+  newEntry->theType = typeOf/*topDef*/;
   newEntry->theName = id;
   newEntry->additionalinfo = ad;
   if (table->entries == NULL) {