Eroare de compilare: user.cpp:4: error: expected unqualified-id before ‘long’ user.cpp: In function ‘int main()’: user.cpp:8: error: ‘n’ was not declared in this scope user.cpp:8: error: ‘k’ was not declared in this scope user.cpp:9: error: ‘i’ was not declared in this scope user.cpp:9: error: ‘el’ was not declared in this scope user.cpp:9: error: ‘tr’ was not declared in this scope user.cpp:10: error: ‘tr’ was not declared in this scope