Compilare: user.cpp: In function ‘int ok2()’: user.cpp:8: warning: operation on ‘cis’ may be undefined user.cpp: In function ‘int ok3()’: user.cpp:18: warning: operation on ‘cis’ may be undefined user.cpp:19: warning: operation on ‘cjs’ may be undefined user.cpp:20: warning: operation on ‘cis’ may be undefined user.cpp:22: warning: operation on ‘cis’ may be undefined user.cpp:24: warning: operation on ‘cjs’ may be undefined