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   W:´ú±íWIDE£¬Ò²¾ÍÊÇOLE,´ú±í¿í×Ö½Ú×Ö·û
   P:´ú±íPOINTER
   A:´ú±íANSIC,Ò²¾ÍÊÇMBCS¶à×Ö½Ú×Ö·û
   S:´ú±íString,ÓÐʱÓÃSTR±íʾ
   C:´ú±íConst
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2. charºÍCString
   ÀýÈç:(1)char * a="hello";
           CString str=a;
        (2)CString str="hello";
           char * a;
           a=str.GetBuffer(str.GetLength());
           str.ReleaseBuffer();
        (3)CString str="hello";
           char a;
           a=str.GetAt(i);
           str.ReleaseBuffer();
        (4)CString str="hello";
           char a[100];
           strcpy(a,str);
        (5)CString mCS=_T("cxl");
           char mch[20];
           memcpy(mch,mCS,20);
        (6)char *ch;
           CString str;
           ch=(LPSTR)(LPCTSTR)str;
3.int,float,doubleºÍCString
   ÀýÈç:(1)CString strval="12.43aa";