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%{
int posint = 0;
int posfrac = 0;
int negint = 0;
int negfrac = 0;
int errors = 0;
%}
d [0-9]
%%
(\+?|-){d}*\.-{d}+ errors++; // invalid numbers
(\+?|-){d}*\.\+{d}+ errors++; // invalid numbers
\+?{d}+\/[1-9]{d}* posfrac++;
-{d}+\/[1-9]{d}* negfrac++;
(\+?|-){d}+\/{d}+ errors++;
\+?{d}+ posint++;
-{d}+ negint++;
\+?{d}*\.{d}+ posfrac++;
-{d}*\.{d}+ negfrac++;
\n ;
. ;
%%
int main(void) {
yylex();
printf("%d positive integers\n" , posint);
printf("%d positive fractions\n" , posfrac);
printf("%d negative integers\n" , negint);
printf("%d negative fractions\n" , negfrac);
printf("%d errors\n" , errors);
}
int yywrap()
{
return(1);
}
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