void CMinInsertDlg::OnGetC() 
{
    // TODO: Add your control notification handler code here
    UpdateData(TRUE);
    if (m_A==""||m_B=="") return;
    int Alengh=m_A.GetLength();
    int Blengh=m_B.GetLength();
    LPCTSTR pA=LPCTSTR(m_A);
    LPCTSTR pB=LPCTSTR(m_B);

    int i;
    for (i=0;i<Alengh;i++)
    {
        if(pA[i]<pB[0]) continue;
        else if (pA[i]>pB[0]) break;
        else if (pA[i]==pB[0])
        {

            int j;
            BOOL bmoveflag=TRUE;
            BOOL bendflag=FALSE;
            int end=Alengh;    //end是以A为索引的
            for (j=1;j<Blengh;j++)
            {
                int k=i+j;
                if (k>=end)    k=i+j%(end-i);
                if (pA[k]==pB[j]) 
                {
                    continue;
                }
                else
                {
                    if(!bendflag)
                    {
                        if(pA[k]<pB[j]) break;
                        end=i+j;
                        j=j-1;
                        bendflag=TRUE;
                        continue;
                    }
                    if(pA[k]>pB[j])
                    {
                        bmoveflag=FALSE;
                        break;    

                    }
                    else
                    {

                        break;
                    }

                }
            }
            if (!bmoveflag) break;
        }
    }
    
    m_C=m_A.Left(i)+m_B+m_A.Mid(i);
    UpdateData(FALSE);

}