Eroare de compilare: user.c:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'A' user.c:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'B' user.c: In function 'main': user.c:24: error: 'A' undeclared (first use in this function) user.c:24: error: (Each undeclared identifier is reported only once user.c:24: error: for each function it appears in.) user.c:31: error: 'B' undeclared (first use in this function)