1.在循环使用数组时需要清理数组

　　CString str;

　　memset(str,0,strlen(str));

判断两个字符串包含数字大小是否相等

　　CString str="22";

　　if(str!="22"){}

2.读取文件

//2.读人员文件renyuan.txtHANDLE rFile;    DWORD dwRet;    memset(str,0,2000);    rFile = CreateFile(_T("\\NANDFlash\\renyuan.txt"),GENERIC_READ ,0,NULL,OPEN_EXISTING,0,NULL);    if(rFile == INVALID_HANDLE_VALUE)    {         AfxMessageBox(_T("打开失败"));         return false;    }else{                    ReadFile(rFile,str,5000,&dwRet,NULL);        ss=str;        do{            index = ss.Find( ';' );            temp=ss.Left( index ) ;            n = temp.Find( ':' );            renyuan_name[num_renyuan]=temp.Left(n);            arr=temp.Right( temp.GetLength( )-n-1 ) ;            m = arr.Find( ',' );            renyuan_gonghao[num_renyuan]=arr.Left(m);            renyuan_danwei[num_renyuan]=arr.Right( arr.GetLength( )-m-1 ) ;            ss=ss.Right( ss.GetLength( )-index-1 );                num_renyuan++;        }while(ss.Find( ';' )!=-1);    }    CloseHandle(rFile);

或者

memset(str,0,2000);	num_renyuan=0;	hFile =file.Open(_T("\\NANDFlash\\renyuan.txt"),CFile::modeRead );	if(hFile == -1){		AfxMessageBox(_T("file open error\n"));      	}	file.Read(str, 2000);	ss=str;	do{	index = ss.Find( ';' );	temp=ss.Left( index ) ;	n = temp.Find( ':' );	renyuan_name[num_renyuan]=temp.Left(n);	arr=temp.Right( temp.GetLength( )-n-1 ) ;	m = arr.Find( ',' );	renyuan_gonghao[num_renyuan]=arr.Left(m);	renyuan_danwei[num_renyuan]=arr.Right( arr.GetLength( )-m-1 ) ;	ss=ss.Right( ss.GetLength( )-index-1 );		num_renyuan++;	}while(ss.Find( ';' )!=-1);	file.Close();

　　写文件代码：

//写入数据		HANDLE hFile;		DWORD dwRet;		char str[2000];		hFile = CreateFile(_T("\\NANDFlash\\renyuan.txt"),GENERIC_READ | GENERIC_WRITE,0,NULL,TRUNCATE_EXISTING,0,NULL);		if(hFile == INVALID_HANDLE_VALUE)		{			 AfxMessageBox(_T("打开失败"));					}else{			if(MessageBox(_T("确认删除用户，密码？"),_T("提示"),MB_OKCANCEL)==1)				{				int i,j;				//1.先将数据更新到数组，				for(i=0,j=0;i
     
      flag){						renyuan_name[j]=renyuan_name[i];						renyuan_gonghao[j]=renyuan_gonghao[i];						renyuan_danwei[j]=renyuan_danwei[i];					}else if(i==flag){						i++;						renyuan_name[j]=renyuan_name[i];						renyuan_gonghao[j]=renyuan_gonghao[i];						renyuan_danwei[j]=renyuan_danwei[i];					}				}				num_renyuan--;				//2.然后将数据从数组更新到文件中				for(i=0;i