VC++中文本文件的读写及处理

 

        在View中添加了以下两个函数，第一个函数用于逐行读出Text文件中的以逗号隔开的数据，并进行简单的处理——使得每行中第一个逗号前的数据以1为后缀，第二个逗号前的数据以2为后缀，以此类推；第二个函数用来将处理后的结果保存到一个新的文件中。

std::vector<CString> CDataPreprocessView::DataPreprocess()

{

      

       std::vector<CString> vecResult;

      

    CStdioFile fsin;

    CString str = "";

       CString strTemp, intToStr;

       int iCommaPosition, iItemCount;

    fsin.Open("D://Visual Workspace//Data Mining//DataPreprocess//mushrooms.txt", CFile::modeReadWrite | CFile::typeText);// Open text file

    while(fsin.ReadString(str)) // read data line by line

       {   iItemCount = 1;

              strTemp = "";

              intToStr = "";

              while((iCommaPosition = str.Find(",")) != -1)

              {//find each comma, and add a number as the suffix of the data before the comma

                     intToStr.Format("%d", iItemCount);

                     strTemp = strTemp + str.Left(iCommaPosition) + intToStr + ",";

                     str = str.Right(str.GetLength() - iCommaPosition - 1);

                     iItemCount++;

              }

              intToStr.Format("%d", iItemCount);

              strTemp += str + intToStr + "/n"; 

 

              vecResult.push_back(strTemp);//temporary store each line processed into a vector

       }

       fsin.Close();// close the file

       return vecResult;

}

// function for saving data into a certain file

void CDataPreprocessView::OnFileSave()

{

       CStdioFile fsout;

       std::vector<CString> vecData;

       std::vector<CString>::iterator it_vecData;

       vecData = DataPreprocess();

       it_vecData = vecData.begin();

       fsout.Open("D://Visual Workspace//Data Mining//DataPreprocess//mushroomsProcessed.txt", CStdioFile::modeReadWrite | CStdioFile::typeText); // open a file for saving data

 

       while(it_vecData != vecData.end())

       {            //write each line in the vector into the file

              fsout.WriteString(*it_vecData);

             

              it_vecData++;

       }

 

       fsout.Close();// close the file

      

}