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- %%
- nnn { exit(0); }
- <<EOF>> { exit(1); }
- nn { ; }
- n { ; }
- . { ; }
- %%
- $ CFLAGS=-lfl make tresn
- lex -o lex.tresn.c tresn.l
- cc -lfl -o tresn lex.tresn.c -ll
- rm -f lex.tresn.c
- $ printf "nn" | ./tresn ; echo $?
- 1
- $ printf "nnn" | ./tresn ; echo $?
- 0
- stream | tr 'xn' '