Compilare: user.cpp: In function ‘bool verif(int, int)’: user.cpp:43:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(!ok1 && ok2==1) ^ user.cpp:38:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(ok1==1 && !ok2) ^ user.cpp: In function ‘int main()’: user.cpp:90:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:90:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^