Eroare de compilare: user.cpp: In function ‘int bun()’: user.cpp:4: error: ‘k’ was not declared in this scope user.cpp:5: error: ‘d’ was not declared in this scope user.cpp:6: error: ‘stie’ was not declared in this scope user.cpp:6: error: ‘elev’ was not declared in this scope user.cpp:6: error: ‘apar’ was not declared in this scope user.cpp:7: error: ‘d’ was not declared in this scope user.cpp:8: error: ‘apar’ was not declared in this scope user.cpp:12: error: ‘apar’ was not declared in this scope user.cpp: In function ‘void back(int)’: user.cpp:19: error: ‘k’ was not declared in this scope user.cpp:21: error: ‘elev’ was not declared in this scope user.cpp:21: error: ‘printf’ was not declared in this scope user.cpp:22: error: ‘printf’ was not declared in this scope user.cpp:26: error: ‘elev’ was not declared in this scope user.cpp:26: error: ‘n’ was not declared in this scope