Compilare: user.cpp: In function ‘bool cauta(int)’: user.cpp:58:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(nr==1) ^ user.cpp: In function ‘int diagonal_sum(int, int, int)’: user.cpp:80:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^