Compilare: user.cpp: In function ‘bool CheckDivisor(int)’: user.cpp:92:23: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(D[vec] == 1 & !Viz[vec]) { ^ user.cpp: In function ‘int main()’: user.cpp:135:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("divizori2.in", "r", stdin); ^ user.cpp:136:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("divizori2.out", "w", stdout); ^