Compilare: user.c: In function 'scan': user.c:8: warning: unused variable 'tmp' user.c:7: warning: unused variable 'i' user.c:7: warning: unused variable 'poz' user.c:7: warning: unused variable 'aux' user.c:6: warning: unused variable 'buffer' user.c: In function 'valid': user.c:58: warning: unused variable 'tma' user.c: In function 'comb': user.c:67: warning: unused variable 'i' user.c: In function 'solve': user.c:105: warning: unused variable 'i' user.c:116:2: warning: no newline at end of file user.c: In function 'main': user.c:116: warning: control reaches end of non-void function