I want the answers to problem 3.5.2,5.2.2(2),5.5.5 and 6.7.1(2,3),please send an email to [email protected],thanks. about dragon-book-exercise-answers HOT 2 OPEN

delim [ ]
spaces {delim}{delim}+
letter [A-Za-z]

%%
{letter} printf("%s",yytext);
{delim} printf(" ");
{spaces} printf(" ");
\n printf("\n");
%%

int yywrap(void)
{
    return 1;
}
int main(void)
{
    yyin=fopen("/path/to/file/a.txt","r");
    yylex();
    fclose(yyin);
    return 0;
}