Compilare: user.cpp: In function ‘int rezolva()’: user.cpp:16:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j; ^ user.cpp:16:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^