Accepted
/in/foo.cc: In function 'char read()':
/in/foo.cc:11:6: warning: unused variable 'res' [-Wunused-variable]
int res=0;
^~~
/in/foo.cc: In function 'char read()':
/in/foo.cc:11:6: warning: unused variable 'res' [-Wunused-variable]
int res=0;
^~~
