Compilare: user.cpp:163:13: warning: "/*" within comment [-Wcomment] /*rez.clear(); rezz.clear(); ^ user.cpp: In constructor ‘arb::arb()’: user.cpp:28:38: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(next,NULL,sizeof(next)); ^ user.cpp: In function ‘void addUser(char*, arb*)’: user.cpp:50:14: warning: NULL used in arithmetic [-Wpointer-arith] if(*c == NULL){ ^ user.cpp: In function ‘void updateUser(char*, arb*, int)’: user.cpp:66:14: warning: NULL used in arithmetic [-Wpointer-arith] if(*c == NULL){ ^ user.cpp: In function ‘void findUser(char*, arb*)’: user.cpp:84:14: warning: NULL used in arithmetic [-Wpointer-arith] if(*c == NULL) ^ user.cpp: In function ‘void solve()’: user.cpp:154:9: warning: unused variable ‘rel’ [-Wunused-variable] int rel; ^ user.cpp:155:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch,q[35]; ^ user.cpp:155:13: warning: unused variable ‘q’ [-Wunused-variable] char ch,q[35]; ^