Compilare: main.cpp: In function 'int main()': main.cpp:40:10: warning: unused variable 'noua' [-Wunused-variable] bool noua , gasit; ^~~~ main.cpp:37:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("char.in","r",stdin); ^ main.cpp:38:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("char.out","w",stdout); ^