diff --git a/ZCppMain/ZMainHead.H b/ZCppMain/ZMainHead.H
index 01b4ab1..ededf32 100644
--- a/ZCppMain/ZMainHead.H
+++ b/ZCppMain/ZMainHead.H
@@ -3706,6 +3706,70 @@ namespace ZNsMain
 
 #endif
 
+    template
+        <typename TTypChar, typename TTypLength>
+    static TTypChar* ZftTrimDecimalZero
+        (TTypChar* APC_Data, TTypLength& ARRI_Length)
+    {
+        /*  문자열 APC_Data 이 어떤 소수를 표현할 경우
+            소수점 뒤에 맨 끝에 있는 의미없는 0 을 지운다.
+        */
+        typedef TTypChar   TypeChar   ;
+        typedef TTypLength TypeLength ;
+
+        TypeChar* VPC_StartChar= APC_Data;
+
+        if(ARRI_Length<=0)
+            { ARRI_Length=0;  return 0; }
+
+        TypeLength VL_PeriodPos =0;
+        TypeLength VL_CurrentPos=0;
+
+        for(; VL_PeriodPos<ARRI_Length; ++VL_PeriodPos)
+        {
+            if( *VPC_StartChar++ =='.' ) break;
+        }
+        /*>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>*/
+
+        // 마침표가 없거나, 맨 앞에 오거나 맨 끝에 오는 경우도 유효하지 않다.
+
+        if(VL_PeriodPos<1 || VL_PeriodPos>=ARRI_Length-1)
+            { return APC_Data; }
+        /*>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>*/
+
+
+        VPC_StartChar = APC_Data +
+            ( VL_CurrentPos = ARRI_Length-1 ) ;
+
+        while(VL_PeriodPos<VL_CurrentPos)
+        {
+            if(*VPC_StartChar!=TypeChar('0'))
+                { break; }
+            /*+++++++++++++++++++++++++++++*/
+
+            *VPC_StartChar=0;
+
+            --VL_CurrentPos;
+            --VPC_StartChar;
+            --ARRI_Length  ;
+        }/*
+        while(VL_PeriodPos<VL_CurrentPos)*/
+
+
+        /*  소수부 맨 끝에 0 을 삭제한 결과,
+            마침표가 끝에 온다면 그 마침표도 지운다.
+        */
+        if(VL_PeriodPos==VL_CurrentPos)
+            { * VPC_StartChar   =TypeChar(0); --ARRI_Length; }
+        else{ *(VPC_StartChar+1)=TypeChar(0);                }
+
+        return APC_Data; /*<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<*/
+    }/*
+    template
+        <typename TTypChar, typename TTypLength>
+    static TTypChar* ZftTrimDecimalZero
+        (TTypChar* APC_Data, TTypLength& ARRI_Length)*/
+
 
     // 절대값을 가져온다.
 
diff --git a/ZCppMain/ZtCStringEx.H b/ZCppMain/ZtCStringEx.H
index 2f7d58c..357e344 100644
--- a/ZCppMain/ZtCStringEx.H
+++ b/ZCppMain/ZtCStringEx.H
@@ -1694,6 +1694,8 @@ namespace ZNsMain
                   ? ::sprintf ((char*   )VCA_BuffParam, /*++++++++*/  "%f", AD_DoubleParam)
                   : ::swprintf((wchar_t*)VCA_BuffParam, CI_BuffSize, L"%f", AD_DoubleParam)
                 );
+            ZNsMain::ZftTrimDecimalZero(VCA_BuffParam, RR(VI_ResultSize));
+
             return (*this)(VCA_BuffParam, VI_ResultSize); /*::::::::::::::*/
         }/*
         ZCStringBase& operator()(double AD_DoubleParam)*/
@@ -6476,59 +6478,6 @@ namespace ZNsMain
         }/*
         ZCStringBase& Trim()*/
 
-        static TypeChar* TrimDecimalZero(TypeChar* APC_Data, TypeLength AI_LengthDec=-1)
-        {
-            /*  문자열 APC_Data 이 어떤 소수를 표현할 경우
-                소수점 뒤에 맨 끝에 있는 의미없는 0 을 지운다. */
-
-            TypeChar* VPC_StartChar=APC_Data;
-
-            if(AI_LengthDec<0)
-            {
-                AI_LengthDec = GetLength(APC_Data) ;
-            }/*
-            if(AI_LengthDec<0)*/
-
-            if(AI_LengthDec<1) return 0;
-
-            TypeLength VL_PeriodPos =0;
-            TypeLength VL_CurrentPos=0;
-
-            for(; VL_PeriodPos<AI_LengthDec; ++VL_PeriodPos)
-            {
-                if( *VPC_StartChar++ =='.' ) break;
-            }/*
-            >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>*/
-
-            // 마침표가 없거나, 맨 앞에 오거나 맨 끝에 오는 경우도 유효하지 않다.
-
-            if(VL_PeriodPos<1 || VL_PeriodPos>=AI_LengthDec-1)
-                { return APC_Data; }
-            //////////////////////////////////////////////////
-
-
-            VPC_StartChar = APC_Data +
-                ( VL_CurrentPos = AI_LengthDec-1 ) ;
-
-            while(VL_PeriodPos<VL_CurrentPos)
-            {
-                if(*VPC_StartChar!='0') break;
-
-                *VPC_StartChar=0;
-
-                --VL_CurrentPos;
-                --VPC_StartChar;
-            }/*
-            while(VL_PeriodPos<VL_CurrentPos)*/
-
-
-            /*  소수부 맨 끝에 0 을 삭제한 결과 마침표가 끝에 온다면 그 마침표도 지운다. */
-
-            if(VL_PeriodPos==VL_CurrentPos) *VPC_StartChar=0;
-
-            return APC_Data; /*<<<<<<<<<<<<<<<<<<<<<<<<<<<<*/
-        }/*
-        static TypeChar* TrimDecimalZero(TypeChar* APC_Data, TypeLength AI_Length=-1)*/
 
         ZCStringBase& TrimDecimalZero()
         {
@@ -6574,9 +6523,7 @@ namespace ZNsMain
             {
                 *VPC_StartChar=0; --ml_UseLen;
             }
-            /*>>>>>>>>>>>>>>>>>>>>>>>>>>>*/
-
-            return *this;
+            return *this; /*+++++++++++++*/
         }/*
         ZCStringBase& TrimDecimalZero()*/
 
diff --git a/ZCppMain/ZtCStringStd.H b/ZCppMain/ZtCStringStd.H
index b963306..32a5d7b 100644
--- a/ZCppMain/ZtCStringStd.H
+++ b/ZCppMain/ZtCStringStd.H
@@ -481,6 +481,8 @@ namespace ZNsMain
                   ? ::sprintf ((char*   )VCA_BuffParam, /*++++++++*/  "%f", AD_DoubleParam)
                   : ::swprintf((wchar_t*)VCA_BuffParam, CI_BuffSize, L"%f", AD_DoubleParam)
                 );
+            ZNsMain::ZftTrimDecimalZero(VCA_BuffParam, RR(VI_ResultSize));
+
             return (*this)(VCA_BuffParam, VI_ResultSize); /*::::::::::::::*/
         }/*
         ZtCStringStd& operator()(double AD_DoubleParam)*/
diff --git a/ZCppMainTest/ZtCStringBase_000.cpp b/ZCppMainTest/ZtCStringBase_000.cpp
index 0afbd7c..33a47e3 100644
--- a/ZCppMainTest/ZtCStringBase_000.cpp
+++ b/ZCppMainTest/ZtCStringBase_000.cpp
@@ -137,7 +137,7 @@ namespace ZNsMain
                 ZftMakeStr(VO_ZCStringStd, ZCCharView("_Z_"));
 
 
-                cout<<"* after ZftMakeStr()"<<endl;
+                cout<<"* after ZftMakeStr(VO_ZCStringStd, ~)"<<endl;
                 cout<<"# "<<VO_ZCStringStd<<endl;
                 cout<<"*****************************************************"<<endl;