Eroare de compilare: main.cpp:4:13: error: variable 'std::ifstream fin' has initializer but incomplete type ifstream fin("derdelus.in"); ^ main.cpp:5:14: error: variable 'std::ofstream fout' has initializer but incomplete type ofstream fout("derdelus.out"); ^ main.cpp: In function 'int main()': main.cpp:12:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("derdelus.in","r",stdin); ^ main.cpp:13:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("derdelus.out","w",stdout); ^ Non zero exit status: 1