Program in YACC to recognize the string „abbb^n, „ab^n „a^n of the langauge (a^n b^n , n>=1) //Program in YACC to recognize the string „abbb^n, „ab^n „a^n of the langauge (a^n b^n , n>=1) File Name : pr11.y %{ # include<stdio.h> int yylex ( void ); int yyerror ( char *); %} %token A B %% statement : expr ; expr :A expr B | A B ; %% int main () { printf( "Enter the string :" ); yyparse(); return 0 ; } int yyerror ( char *s) { printf( "Invalid" ); } File Name : pr11.l %{ # include "y.tab.h" extern int yylval; %} A [a] B [b] %% {A} {yylval=yytext[ 0 ]; return A;} {B} {yylval=yytext[ 1 ]; return B;} \ n { return 0 ;} . { return yytext[ 0 ];} %% // Output of the Above Program. Program in YACC to recognize the string „abbb^n, „ab^n „a^n of the langauge (a^n b^n , n>=1)
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