diff --git a/Makefile b/Makefile
index a9544ee..3a7cffc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,16 @@
-# Basic Makefile example from flex documentation -- provides explicit rules
-# Creates "myprogram" from "scan.l" and "myprogram.c"
-#
-#LEX=flex
-#myprogram: scan.o myprogram.o
-        #$(CC) -o $@ $(LDFLAGS) $^
-#myprogram.o: myprogram.c
-        #$(CC) $(CPPFLAGS) $(CFLAGS) -o $@ -c $^
-#scan.o: scan.c
-        #$(CC) $(CPPFLAGS) $(CFLAGS) -o $@ -c $^
-#scan.c: scan.l
-        #$(LEX) $(LFLAGS) -o $@ $^
-#clean:
-        #$(RM) *.o scan.c
+CC := gcc
+FLEX := flex
+LEX := lexicalStructure.lex
+EXE := lexicalStructure
+
+lexicalStructure:
+	$(FLEX) $(LEX)
+	$(CC) lex.yy.c -o $(EXE)
+
+test_operators:
+	./$(EXE) ./tests/test_operators.alpha
+
+clean:
+	rm -f *.o
+	rm -f lex.yy.c
+	rm -f $(EXE)
diff --git a/lexicalStructure.lex b/lexicalStructure.lex
index baadc20..e658e4d 100644
--- a/lexicalStructure.lex
+++ b/lexicalStructure.lex
@@ -1,11 +1,13 @@
-	/*                                    so we placed the citation here. */
-	/* definitions */
+/* Lexical Analysis with Flex (1.6.0) We used some of the code from this manual */
+/*                                    so we placed the citation here. */
+/* definitions */
+
 %option noyywrap
 
 %{ 
 #include "typedefs.h" 
 %}
-
+        int line_number = 1, column_number = 1;
 
 DIGIT [0-9]
 CHAR \\n|\\t|\\'|[^'\n\t\\]
@@ -18,33 +20,61 @@ COMMENTCHAR [^\*]|\*[^\)]
 	/*Making the contents of a comment anything that is either not a * or not a * followed by ) to terminate comments at the first ENDCOM */
 %%
 
+
+\n      line_number++ column_number = 1;
+.       column_number++;
+
+"integer"       {return T_INTEGER}
+"address"       {return T_ADDRESS}
+"Boolean"       {return T_BOOLEAN}
+"character"     {return T_CHARACTER}
+
+
 	/* rules */
 {DIGIT}+ {printf( "C_INTEGER: %s (%d)\n", yytext, atoi( yytext ) );}
 
 "null" {printf( "C_NULL: %s (%d)\n", yytext, atoi( yytext ) );}
 
+"while"         {return WHILE}
+"if"            {return IF}
+"then"          {return THEN}
+"else"          {return ELSE}
+"type"          {return TYPE}
+"function"      {return FUNCTION}
+"return"        {return RETURN}
+"external"      {return EXTERNAL}
+"as"            {return AS}
+
 '{CHAR}' {printf( "C_CHARACTER: %s (%d)\n", yytext, atoi( yytext ) );} /*using double \ per documentation to show escaped chars*/
 
 "true" {printf( "C_TRUE: %s (%d)\n", yytext, atoi( yytext ) );}
 
+
 "false" {printf( "C_FALSE: %s (%d)\n", yytext, atoi( yytext ) );}
 
+	/* OPERATORS */
+
+"+"		{return ADD;}
+"-"		{return SUB_OR_NEG;}
+"*"		{return  MUL;}
+"/"		{return DIV;}
+"%"		{return REM;}
+"<"		{return LESS_THAN;}
+"="		{return EQUAL_TO;}
+":="		{return ASSIGN;}
+"!"		{return NOT;}
+"&"		{return AND;}
+"|"		{return OR;}
+"."		{return DOT;}
+"reserve"	{return RESERVE;}
+"release" 	{return RELEASE;}
+ 
+
 \"{SCHAR}*\" {printf( "C_STRING: %s (%d)\n", yytext, atoi( yytext ) );}
 
 \(\*{COMMENTCHAR}*\*\) {printf( "COMMENT: %s (%d)\n", yytext, atoi( yytext ) );}
 
 .|\n  
 
+
 %%
-	/* user code */
-
-int main( int argc, char **argv )
-{
-	argc--, argv++; /* skip over program name */
-	if ( argc > 0 )
-		yyin = fopen( argv[0], "r" );
-	else
-		yyin = stdin;
-	yylex();
-
-}
diff --git a/runner.c b/runner.c
index e69de29..3d467b8 100644
--- a/runner.c
+++ b/runner.c
@@ -0,0 +1,38 @@
+#include "runner.h"
+
+
+int main(int argc, char *argv[]) {
+    char *check_input;
+    int token;
+    //check_input can be compared to INVALID_ARG and DIFF_ARG to determine if -tok and holds the generated file name if it is
+    check_input = is_tok(argc, argv);
+    FILE * output = fopen(check_input, "w");
+
+    if (check_input == INVALID_ARG) {
+        return -1;
+    }
+    
+    while (0 != (token = yylex())) {
+        if (check_input != DIFF_ARG) {
+            fprintf(output, "%d %d %3d \"%s\"\n", line_number, column_number, token, yytext);
+        }        
+    }
+
+    return 0;
+}
+
+char *is_tok(int argc, char *argv[]) {
+    if (argc == 3 && strcmp("-tok", argv[1])) {
+        char *input_prog = argv[2];
+        int file_len = strlen(input);
+        //check that input program is a .alpha file
+        if (strcmp(".alpha", input_prog[file_len - ALPHA_OFFSET]) != 0) {
+            return INVALID_ARG;
+        }
+        char *FILE_tok[file_len - ALPHA_OFFSET + TOK_LEN]; 
+        strncpy(input, FILE_tok, file_len - ALPHA_OFFSET); //copy name of prog before .alpha
+        strcpy(".tok", FILE_tok[file_len - ALPHA_OFFSET]); //add .tok to end of file name
+        return FILE_tok;
+    }
+    return DIFF_ARG;
+} 
diff --git a/runner.h b/runner.h
new file mode 100644
index 0000000..080d5c1
--- /dev/null
+++ b/runner.h
@@ -0,0 +1,13 @@
+#define ALPHA_OFFSET 5
+#define TOK_LEN 3
+#define INVALID_ARG "invalid"
+#define DIFF_ARG "diff"
+#include <string.h>
+#include <std.io>
+#include "lex.yy.c"
+
+extern int line_number, column_number;
+extern char *yytext;
+
+int main(int argc, char* argv);
+char *is_tok(int argc, char* argv);#define ALPHA_OFFSET 5
diff --git a/tests/test_operators.alpha b/tests/test_operators.alpha
new file mode 100644
index 0000000..b985387
--- /dev/null
+++ b/tests/test_operators.alpha
@@ -0,0 +1,23 @@
++
+-
+*
+/
+\
+%
+<
+>
+=
+:=
+=:
+:
+=
+!
+&
+|
+.
+relEASE
+release
+RELEASE
+reserve
+RESERVE
+reSERVe
\ No newline at end of file