Eroare de compilare: user.cpp:1:21: error: iostream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:39: error: ‘cin’ was not declared in this scope user.cpp:75: error: ‘cout’ was not declared in this scope user.cpp:75: error: ‘endl’ was not declared in this scope user.cpp:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result