Eroare de compilare: user.c: In function 'main': user.c:7: error: redeclaration of 'b' with no linkage user.c:7: error: previous declaration of 'b' was here user.c:8: error: 'n' undeclared (first use in this function) user.c:8: error: (Each undeclared identifier is reported only once user.c:8: error: for each function it appears in.) user.c:9: error: 'nj' undeclared (first use in this function) user.c:9: error: expected ';' before ')' token user.c:20:2: warning: no newline at end of file