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sintatico.y~
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sintatico.y~
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%{
#include "global.h"
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
extern char buffer;
//extern FILE *stdin;
//stdin = fopen ("texto.txt", "r");
%}
%token INTEGER FLOAT STRING
%token NEG
%token PLUS MINUS TIMES DIVIDE POWER
%token LEFT_PARENTHESIS RIGHT_PARENTHESIS
%token LEFT_COLCHETES RIGHT_COLCHETES
%token LEFT_KEYS RIGHT_KEYS
%token IF IF2 THEN ELSE AND OR NOT DEFAULT
%token EQUALS SMALLER_THAN BIGGER_THAN COMPARATION SMALLER_EQUALS BIGGER_EQUALS
%token PRINT SCANF QUOTATION ARROW
%token TYPING
%token END_LINE VIRGULA
%%
Input:
/* Empty */
| Input Line
;
Line:
END_LINE
| Expression END_LINE { }
| Atribuicao
| If
| Write END_LINE { }
| Read END_LINE { }
| Comparacao
;
Integer:
INTEGER
;
Float:
FLOAT
;
Atribuicao:
STRING EQUALS Expression { printf("%s = %f", &buffer, $3); }
|STRING EQUALS STRING { printf("Atribuicao2"); }
;
Boolean:
AND { printf(" && "); }
| Boolean OR { printf(" || "); }
| Boolean NOT { printf(" ! "); }
;
Expression:
Integer { $$=$1; }
|Float { $$=$1; }
| Expression POWER Expression { $$=pow($1,$3); }
| LEFT_PARENTHESIS Expression RIGHT_PARENTHESIS { $$=$2; }
| LEFT_COLCHETES Expression RIGHT_COLCHETES { $$=$2; }
| LEFT_KEYS Expression RIGHT_KEYS { $$=$2; }
| Expression PLUS Expression { $$ = $1 + $3; printf("%f\n",$$);}
| Expression MINUS Expression { $$=$1-$3; }
| Expression TIMES Expression { $$=$1*$3; }
| Expression DIVIDE Expression { $$=$1/$3; }
| MINUS Expression %prec NEG { $$ = -$2; }
;
If:
IF LEFT_PARENTHESIS {printf ("if(");} Comparacao RIGHT_PARENTHESIS { printf(")"); }
| IF2 { printf("if(");} Comparacao { printf(")"); }
;
Comparacao:
Comparacao Boolean Comparacao
| Expression SMALLER_THAN Expression {printf ("%f < %f", $1, $3);}
| Expression BIGGER_THAN Expression {printf ("%f > %f", $1, $3);}
| Expression COMPARATION Expression {printf ("%f == %f", $1, $3);}
| Expression SMALLER_EQUALS Expression {printf ("%f <= %f", $1, $3);}
| Expression BIGGER_EQUALS Expression {printf ("%f >= %f", $1, $3);}
;
Write:
PRINT LEFT_PARENTHESIS QUOTATION STRING QUOTATION RIGHT_PARENTHESIS { printf( "printf(\"%s\"); \n", &buffer); }
;
Read:
STRING ARROW SCANF {printf("scanf(\"%%s\", &%s);", &buffer);}
;
/*
List:
EQUALS LEFT_COLCHETES INTEGER VIRGULA Term RIGHT_COLCHETES { }
;
Term:
INTEGER
| VIRGULA Term { }
;
*/
%%
int yyerror(char *s) {
printf("%s\n",s);
}
int main(void) {
yyparse();
}