implement lexical analysis function for c-minus

src/globals.h

@@ -23,17 +23,17 @@
 #endif
 
 /* MAXRESERVED = the number of reserved words */
-#define MAXRESERVED 8
+#define MAXRESERVED 6
 
 typedef enum 
     /* book-keeping tokens */
    {ENDFILE,ERROR,
     /* reserved words */
-    IF,THEN,ELSE,END,REPEAT,UNTIL,READ,WRITE,
+    IF,ELSE,WHILE,RETURN,INT,VOID,
     /* multicharacter tokens */
     ID,NUM,
     /* special symbols */
-    ASSIGN,EQ,LT,PLUS,MINUS,TIMES,OVER,LPAREN,RPAREN,SEMI
+    ASSIGN,EQ,NE,LT,LE,GT,GE,PLUS,MINUS,TIMES,OVER,LPAREN,RPAREN,LBRACE,RBRACE,LCURLY,RCURLY,SEMI,COMMA
    } TokenType;
 
 extern FILE* source; /* source code text file */