%{
#include<stdio.h>
%}
digit [0-9]+
%%
@ printf
(“\n Enter the
number:”
); \+?
{digit
} printf
(“\n
Number is positive…\n”
); \-{digit
} printf
(“\n
Number is negative…\n”
); %%
int yywrap()
{
return 1;
}
int main()
{
yylex();
}
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