Eroare de compilare: user.cpp: In function ‘void gen()’: user.cpp:14: error: ‘srand’ was not declared in this scope user.cpp:18: error: ‘rand’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:42: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result