Compilare: main.cpp: In function 'int main()': main.cpp:11:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv2.in","r",stdin); ^ main.cpp:12:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv2.out","w",stdout); ^ main.cpp:38:24: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<st<<" "<<dr<<" "<<sm; ^~~ main.cpp:38:15: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<st<<" "<<dr<<" "<<sm; ^~~