Accepted
/in/foo.c: In function 'main': /in/foo.c:44:10: warning: variable 'u' set but not used [-Wunused-but-set-variable] char u; ^
/in/foo.c: In function 'main': /in/foo.c:44:10: warning: variable 'u' set but not used [-Wunused-but-set-variable] char u; ^