摘要： linux下c程序使用postgresql 8.4连接数据库时编译出现的问题。1. 问题：In function `main': `PGconn' undeclared (first use in this function) `PGresult' undeclared (first use in this function) `CONNECTION_BAD' undeclared (first use in this function) `PGRES_COMMAND_OK' undeclared (first use in this function) 阅读全文