LEX TOOL ECHO AND REJECT KEY WORD COMPILER DESIGN GTU

%{
%}
%%
[a-z]+ {
printf("\nString containing lowercase=");
ECHO;
}
[A-Z]+ {
printf("\nString containing uppercase =");
ECHO;
REJECT;
}
%%
main()
{
yylex();
}
int yywrap()
{
return 1;
}