Eroare de compilare: user.cpp:4:22: error: iostream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:23: error: ‘strlen’ was not declared in this scope user.cpp:27: warning: operation on ‘j’ may be undefined user.cpp:13: warning: unused variable ‘g’ user.cpp:22: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result