%{
int line_count=0;
%}

%%

"("		{ printf("LEFT_PAREN\n"); }
")"		{ printf("RIGHT_PAREN\n"); }
","		{ printf("COMMA\n"); }
":"		{ printf("COLON\n"); }
";"		{ printf("SEMI\n"); }
":="		{ printf("ASSIGN\n"); }
"<"		{ printf("LESS_THAN\n"); }
"+"		{ printf("PLUS\n"); }
"."		{ printf("PERIOD\n"); }


program |
input |
output |
var |
integer |
float |
begin |
while |
do |
end		{ printf("%d: Keyword %s found\n",
                       line_count+1, yytext); }

[A-Za-z][A-Za-z0-9]*	{ printf("ID val=%s\n", yytext); }

[0-9]+		{ printf("INTEGER val=%d\n", atoi(yytext)); }

[0-9]+\.[0-9]+	{ printf("FLOAT val=%s\n", yytext); }

.		/* ignore */ ;

"\n"		line_count ++;

%%

main() {
  yylex();
  printf("%d lines found\n", line_count);
}