YYY=StrLeft(XXX.DESC,1); E=StrToInt(StrMid(XXX.DESC,1,1)); F=StrToInt(StrMid(XXX.DESC,2,2)); IF YYY=="D" THEN SWITCH (E) CASE 1: MsgBox("敌对信号机开放")； CASE 2: MsgBox("道岔四开")； CASE 3: MsgBox("防护信号灯不能开放")； CASE 4: MsgBox("进路无法解锁")； CASE 5: MsgBox("轨道不空闲")； CASE 6: MsgBox("所选按钮不能办理进路")； CASE 7: MsgBox("无法单操道岔")； CASE 8: MsgBox("轨道锁闭失败")； CASE 9: MsgBox("道岔没有单操到位")； ENDSWITCH ELSE IF YYY<>"D"&&E==0 THEN SWITCH (F) CASE 01: DC1_3.DESC=XXX.DESC; CASE 02: DC2_4.DESC=XXX.DESC; CASE 05: DC5.DESC=XXX.DESC; CASE 10: DC10.DESC=XXX.DESC; CASE 09: DC7_9.DESC=XXX.DESC; CASE 08: DC6_8.DESC=XXX.DESC; ENDSWITCH ELSE IF YYY<>"D"&&E==1 THEN SWITCH (F) CASE 90: XXJJ.DESC=XXX.DESC; CASE 03: 3DG.DESC=XXX.DESC; CASE 57: 5_7DG.DESC=XXX.DESC; CASE 30: 3G.DESC=XXX.DESC; CASE 11: IG.DESC=XXX.DESC; CASE 60: 6_10DG.DESC=XXX.DESC; CASE 04: 4DG.DESC=XXX.DESC; CASE 15: XXLQ.DESC=XXX.DESC; CASE 91: SXLQ.DESC=XXX.DESC; CASE 13: IIAG.DESC=XXX.DESC; CASE 01: 1DG.DESC=XXX.DESC; CASE 09: 9DG.DESC=XXX.DESC; CASE 12: IIG.DESC=XXX.DESC; CASE 08: 8DG.DESC=XXX.DESC; CASE 02: 2DG.DESC=XXX.DESC; CASE 36: IIBG.DESC=XXX.DESC; CASE 17: SXJJ.DESC=XXX.DESC; ENDSWITCH ELSE SWITCH (F) CASE 03: D3.DESC=XXX.DESC; CASE 01: D1.DESC=XXX.DESC; CASE 13: S3.DESC=XXX.DESC; CASE 11: SI.DESC=XXX.DESC; CASE 12: SII.DESC=XXX.DESC; CASE 53: X3.DESC=XXX.DESC; CASE 51: X1.DESC=XXX.DESC; CASE 52: XII.DESC=XXX.DESC; CASE 24: D4.DESC=XXX.DESC; CASE 81: SF.DESC=XXX.DESC; CASE 22: D2.DESC=XXX.DESC; CASE 83: S.DESC=XXX.DESC; ENDSWITCH ENDIF ENDIF ENDIF 系统提示说“发现多余操作数”“SWITH语句出错” 请各位指教!