Compilare: user.cpp: In function ‘int main()’: user.cpp:7:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sotron.in","r",stdin); ^ user.cpp:8:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sotron.out","w",stdout); ^ user.cpp:22:35: warning: ‘cc’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(l!=0&&l<=n&&c!=0&&c<=n){ ^ user.cpp:22:13: warning: ‘ll’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(l!=0&&l<=n&&c!=0&&c<=n){ ^