Undefined symbol '_DBConnect@4' referenced in "Login.c".
Undefined symbol '_DBDeactivateSQL@4' referenced in "Login.c".
Undefined symbol '_DBFetchNext@4' referenced in "Login.c".
Undefined symbol '_DBActivateSQL@8' referenced in "Login.c".
Undefined symbol '_DBDisconnect@4' referenced in "Login.c".
请问这五个错误是什么原因啊?帮忙解决一下,急用。谢谢