Eroare de compilare: user.cpp: In function ‘void sortare()’: user.cpp:30: error: ‘strcmp’ was not declared in this scope user.cpp:33: error: ‘strcpy’ was not declared in this scope user.cpp:35: error: ‘strcmp’ was not declared in this scope user.cpp:37: error: ‘strcpy’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:81: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result