#define TOK_INT         1
#define TOK_DOUBLE      2
#define TOK_IF          3
#define TOK_THEN        4
#define TOK_BEGIN       5
#define TOK_END         6
#define TOK_PROCEDURE   7
#define TOK_FUNCTION    8
#define TOK_EQUAL       9
#define TOK_SEMICOLON   10
#define TOK_ID          11
#define TOK_PLUS        12
#define TOK_MINUS       13
#define TOK_TIMES       14
#define TOK_DIV         15