07/07/25 18:23:05
>>886続き
※yaccファイル：ch3-05.y
%{
#include "ch3-05.h"
#include <string.h>
#include <math.h>
%}
%union {
double dval;
struct symtab *symp;
}
%token <symp> NAME
%token <dval> NUMBER
%left '+' '-'
%left '*' '/'
%nonassoc UMINUS
%type <dval> expression
%%
statement_list: statement '\n'
| statement_list statement '\n'
;
statement: NAME '=' expression { $1->value = $3; }
| expression { printf("= %g\n", $1); }
;