Eroare de compilare: user.c: In function 'main': user.c:7: error: 'n' undeclared (first use in this function) user.c:7: error: (Each undeclared identifier is reported only once user.c:7: error: for each function it appears in.) user.c:8: error: expected ';' before 'printf' user.c:10: warning: unknown conversion type character 'U' in format user.c:10: warning: too many arguments for format user.c:12:2: warning: no newline at end of file