diff --git a/ZCppMain/ZMainHead.H b/ZCppMain/ZMainHead.H
index 0c3eaf9..a10aca9 100644
--- a/ZCppMain/ZMainHead.H
+++ b/ZCppMain/ZMainHead.H
@@ -7288,7 +7288,7 @@ namespace ZNsMain
                 ZCLink* VP_OnePrev =AR_LinkOne.  mp_PrevLink;
 
                 ZCLink::JoinLink(&AR_LinkTwo,  VP_HeadNext) ;
-                ZCLink::JoinLink(VP_OnePrev , &AR_LinkOne ) ;
+                ZCLink::JoinLink( VP_OnePrev, &AR_LinkOne ) ;
                 ZCLink::JoinLink(&AR_LinkOne,  VP_OneNext ) ;
                 ZCLink::MakeRing(&AR_LinkTwo,  mp_TailLink) ;
 
@@ -7300,10 +7300,10 @@ namespace ZNsMain
                 ZCLink* VP_OneNext =AR_LinkOne.  mp_NextLink;
                 ZCLink* VP_OnePrev =AR_LinkOne.  mp_PrevLink;
 
-                ZCLink::JoinLink(VP_OnePrev , &AR_LinkTwo ) ;
-                ZCLink::JoinLink(&AR_LinkTwo,  VP_OneNext ) ;
-                ZCLink::JoinLink(VP_TailPrev, &AR_LinkTwo ) ;
-                ZCLink::MakeRing(mp_HeadLink, &AR_LinkTwo ) ;
+                ZCLink::JoinLink( VP_OnePrev , &AR_LinkTwo ) ;
+                ZCLink::JoinLink(&AR_LinkTwo,   VP_OneNext ) ;
+                ZCLink::JoinLink( VP_TailPrev, &AR_LinkTwo ) ;
+                ZCLink::MakeRing( mp_HeadLink, &AR_LinkTwo ) ;
 
                 mp_TailLink = &AR_LinkTwo ; return *this;
             }
diff --git a/ZCppMainTest/ZtCBaseList_000.cpp b/ZCppMainTest/ZtCBaseList_000.cpp
index 38d067a..3a6ffe6 100644
--- a/ZCppMainTest/ZtCBaseList_000.cpp
+++ b/ZCppMainTest/ZtCBaseList_000.cpp
@@ -601,6 +601,24 @@ namespace ZNsMain
                 cout<<"*****************************************************"<<endl;
                 VO_ZCBaseListEx10_2.IterElemLink(&ShowNode10_3, ZftMCP(VI_CallCnt=0));
 
+                cout<<endl<<"# after VO_ZCBaseListEx10_2.SwapLink(6th, 2th)"<<endl;
+                VO_ZCBaseListEx10_2.SwapLink
+                    ( VO_ZCBaseListEx10_2.HeadRef(5), VO_ZCBaseListEx10_2.HeadRef(1) );
+                cout<<"*****************************************************"<<endl;
+                VO_ZCBaseListEx10_2.IterElemLink(&ShowNode10_3, ZftMCP(VI_CallCnt=0));
+
+                cout<<endl<<"# after VO_ZCBaseListEx10_2.SwapLink(6th, 5th)"<<endl;
+                VO_ZCBaseListEx10_2.SwapLink
+                    ( VO_ZCBaseListEx10_2.HeadRef(5), VO_ZCBaseListEx10_2.HeadRef(4) );
+                cout<<"*****************************************************"<<endl;
+                VO_ZCBaseListEx10_2.IterElemLink(&ShowNode10_3, ZftMCP(VI_CallCnt=0));
+
+                cout<<endl<<"# after VO_ZCBaseListEx10_2.SwapLink(6th, 1th)"<<endl;
+                VO_ZCBaseListEx10_2.SwapLink
+                    ( VO_ZCBaseListEx10_2.HeadRef(5), VO_ZCBaseListEx10_2.HeadRef() );
+                cout<<"*****************************************************"<<endl;
+                VO_ZCBaseListEx10_2.IterElemLink(&ShowNode10_3, ZftMCP(VI_CallCnt=0));
+
                 return 0;
             }/*
             static int Main(int AI_ArgCnt=0, char* APP_ArgVal[]=0)*/