CString s_str[5];
     CString s_strs;
    UpdateData(1);
    m_totalScore=m_unitScore+m_teacherScore+m_respondentScore;
    m_averageScore=(m_unitScore+m_teacherScore+m_respondentScore)/3;

    // s_str=CString(m_idNum)+m_Name+m_workUnit+CString(m_unitScore)+CString(m_teacherScore)+CString(m_respondentScore)+CString(m_averageScore)+CString(m_totalScore);
                        s_str[0].Format("%d",m_idNum); 这里是转换
                        s_str[1].Format("%d",m_unitScore);
                        s_str[2].Format("%d",m_teacherScore);
                        s_str[3].Format("%d",m_respondentScore);
                        s_str[4].Format("%d",m_averageScore);
                        s_str[5].Format("%d",m_totalScore);

       
    s_strs=CString("编号")+CString("姓名")+CString("实习单位")+CString("单位评分")+CString("老师评分")+CString("答辩成绩")+CString("平均成绩")+CString("总成绩\n")+s_str[0]+m_Name+m_workUnit+s_str[1]+s_str[2]+s_str[3]+s_str[4]+s_str[5];  将他们连接起来
   
    //     +m_Name+m_workUnit+m_unitScore+m_teacherScore+m_respondentScore+m_averageScore+m_totalScore;
    m_studentShow = s_strs;
    UpdateData(0);

  编译的时候没问题，生成EXE也没问题，就是执行这个的时候就提示错误！内存问题

你定义的对象数组为CString s_str[5];
但却分别有s_str[0]、s_str[1]、s_str[2]、s_str[3]、s_str[4]、s_str[5],不发生溢出错才怪！