diff --git a/src/grammar.h b/src/grammar.h
new file mode 100644
index 0000000..58cedbd
--- /dev/null
+++ b/src/grammar.h
@@ -0,0 +1,10 @@
+#ifndef GRAMMAR_H
+#define GRAMMAR_H
+
+#include "../src/runner.h"
+
+void yyerror(const char *err);
+int token_tracker;
+TableNode * tn;
+
+#endif
\ No newline at end of file
diff --git a/src/lexicalStructure.h b/src/lexicalStructure.h
new file mode 100644
index 0000000..c7baafe
--- /dev/null
+++ b/src/lexicalStructure.h
@@ -0,0 +1,33 @@
+#ifndef LEXICALSTRUCTURE_H
+#define LEXICALSTRUCTURE_H
+
+#include "../tmp/grammar.tab.h"
+#include "../src/symbol_table.h"
+
+extern SymbolTable * cur;
+extern FILE* tok_flag;
+extern TableNode *funprime;
+extern TableNode *funtypeprime;
+extern TableNode *arrayprim;
+extern TableNode *recprime;
+extern TableNode *integ;
+extern TableNode *addr;
+extern TableNode *chara;
+extern TableNode *stri;
+extern TableNode *boo;
+extern TableNode *undefined;
+extern void incr(int lnum,int cnum, int tok);
+extern void print_tok(int tok);
+
+extern int line_number;
+extern int column_number;
+extern int yycolumn;
+#define YY_USER_ACTION {                            \
+    yylloc.first_line = yylineno;                   \
+    yylloc.last_line = yylineno;                    \
+    yylloc.first_column = yycolumn;                 \
+    yylloc.last_column = yycolumn + yyleng - 1;     \
+    yycolumn += yyleng;                             \
+}
+
+#endif
\ No newline at end of file