Voting
Category
real language
Bookmarking
Language Yacc
| Date: | 04/20/05 |
| Author: | James Copher |
| URL: | n/a |
| Comments: | 0 |
| Info: | n/a |
| Score: |  (3.32 in 22 votes) |
%{
/*
** 99 bottles of beer yacc-like
** by: James Copher jec@netcom.com
*/
#include<stdio.h>
static int bottles=99;
%}
%union{ int bottle; }
%token <bottle> BOTTLES NOMORE
%type <bottle> beer nomore
%start round
%%
round : beer nomore {
YYACCEPT;
};
beer : BOTTLES {
printf("%d bottles of beer on the wall\n%d bottles of beer\n"
"Take one down,\npass it around\n",$1,$1);
}
| beer BOTTLES {
printf("%d bottle%s of beer on the wall\n\n"
"%d bottle%s of beer on the wall\n%d bottle%s of beer\n"
"Take one down\npass it around\n",
$2,$2!=1?"s":"",$2,$2!=1?"s":"",$2,$2!=1?"s":"");
};
nomore : NOMORE {
printf("No more bottles of beer on the wall\n");
};
%%
yyerror(){}
yylex(){ if(bottles){ yylval.bottle=bottles--; return BOTTLES; } return NOMORE; }
main(){ yyparse(); }
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