Eroare de compilare: user.cpp:5: error: ‘N’ was not declared in this scope user.cpp: In function ‘int expresie()’: user.cpp:9: error: ‘termen’ was not declared in this scope user.cpp:10: error: ‘s’ was not declared in this scope user.cpp: In function ‘int termen()’: user.cpp:24: error: ‘s’ was not declared in this scope user.cpp: In function ‘int factor()’: user.cpp:37: error: ‘s’ was not declared in this scope user.cpp:39: error: ‘semn’ was not declared in this scope user.cpp:43: error: ‘s’ was not declared in this scope user.cpp:47: error: ‘semn’ was not declared in this scope user.cpp:36: warning: unused variable ‘sum’