How can I save real time data in a text file

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Hi, I have the following code

if (StartMonitor) //StartMonitor
{

    TotalVoltage5s += CalculatePower();
    //TotalVoltage5s += 20;
    xx123++;

    CString sad;
    m_power_edit.GetWindowText(sad);

    int num1 = _ttoi(sad);
    if(xx123 >= num1){
        if(TotalTime > 19){

            Power_Log_Chart.ClearChart();
            TotalTime = 0;

        }

        CTime tm;
        tm=CTime::GetCurrentTime();
        CString str=tm.Format("%X");
        ostringstream os;
        float ds= (float)atof((char *)(LPTSTR)(LPCTSTR)sad);
        os << TotalVoltage5s/ds;
        ostringstream os1;
        m_power_list.InsertColumn(Current_columns,"",LVCFMT_CENTER,80,0);
        m_power_list.SetItemText(0, Current_columns, str);
        m_power_list.SetItemText(1, Current_columns, os.str().c_str());
        m_power_list.SetItemState(Current_columns, LVIS_SELECTED|LVIS_FOCUSED, LVIS_SELECTED|LVIS_FOCUSED);
        m_power_list.EnsureVisible(Current_columns, FALSE);


        Power_Log_Chart.SetXYValue(TotalTime, TotalVoltage5s/ds, TotalTime, 0);
        TotalTime++;
        TotalVoltage5s = 0;

What it simply does, it takes the calculated value of Calculatepower() function and display the results in every 5 seconds using Totalvoltage5s and and TotalTime. I need a way to save these data in a txt file every 19 seconds.

What I have tried:

I have tried to save the data using a FOR loop but I keep getting an error.

Posted 2-Aug-18 7:39am

Baderd94

Updated 22-Aug-18 14:33pm

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Comments

jeron1 2-Aug-18 13:45pm

and that error would be?

Baderd94 2-Aug-18 13:54pm

that is what i tried to do,

for (int q =0; q< 19; q++)
{
SavePowerData[q] = TotalVoltage5s;
}

but when i display the data, it gives no results so empty file, where SavePowerData is a global variable

jeron1 2-Aug-18 14:06pm

What file are you referring to?

Patrice T 2-Aug-18 14:13pm

and the error message is ?

Baderd94 2-Aug-18 14:12pm

I have the following code

for (int q =0; q< 19; q++)
{
SavePowerData[q] = TotalVoltage5s;
SaveTimeData[q] = TotalTime;
}

To store the data, then i have another function called onsavedata, in side this function i put the following

CString str10;
CFileDialog FileDlg10(FALSE," ","Power Log Data.txt",OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT , "TXT File(*.txt)|*.txt|All(*.*)|*.*|");
if(FileDlg10.DoModal()==IDOK)
{
ofstream ofs(FileDlg10.GetPathName());
ofs.write(str10,str10.GetLength());
ofs.close();
AfxMessageBox("Saved!");
}
else
{
AfxMessageBox("Failed to Save!");
}
ofstream PowerData(FileDlg10.GetPathName(), ios::out);

PowerData<<SavePowerData<<endl;

PowerData.close();

Patrice T 2-Aug-18 14:27pm

Use Improve question to update your question.
So that everyone can pay attention to this information.

jeron1 2-Aug-18 15:25pm

The file 'ofs' will contain nothing because CString 'str10' is empty. For 'PowerData' file, you have to write each entry in the SavePowerData array, which you can use a for loop to do.

[no name] 19-Aug-18 13:01pm

Where is this for..loop?

2 solutions

Solution 1

No need for a for loop, the following code will save the data for us in an excel file:

std::ofstream outfile;
outfile.open("Real-Time.csv", std::ios_base::app);
outfile<<TotalTime<<", "<<os.str().c_str()<<", "<<os1.str().c_str()<<endl;
outfile.close();

Posted 20-Aug-18 17:05pm

Baderd94

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Baderd94 · Accepted Answer · 2018-08-22T14:34:00

Solution 2

This code works for me:

std::ofstream outfile;
outfile.open("Real-Time.csv", std::ios_base::app);
outfile<<TotalTime<<", "<<os.str().c_str()<<", "<<os1.str().c_str()<<endl;

Posted 22-Aug-18 14:34pm

Baderd94