Reading a tab separated text file, visual C++ 6 URGENT

[tarkes]

Purpose of MFC SDI: read a text file having floating values with tab separated not comma

I added a menu Contour plot menu and 1. colour and 2. Gray Scale as sub menu. On pressing Colour a dialog box appears, whose purpose is to browse a text file. I browse and selct it and the path is visible in an EDIT box beside the browse button
and a plot button in dialog box to plot on the SDI window.

I am successful in browsing and selecting the text file. When I click plot button it should read and further porcess it which i am not able to implement. I ahve the logic to process it. I need to read the text file and store the floating point values in an 2D array. Anyone can help me please. its urgent!!
Dialog box picture looks somewhat like this

--------------------------------------------------------------------------|
|
-----------------------------------------------| |
|C://Mytext.txt | Browse Button |
| | |
------------------------------------------------

PLOT BUTTON
--------------------------------------------------------------------------








The dialog class i am attaching the code


void CColourdlg::OnBrowse() //BROWSE BUTTON
{
// TODO: Add your control notification handler code here

//Code to Browse Button and display in the edit box
CFileDialog FileDialog(TRUE,
"*.*",
NULL,
OFN_HIDEREADONLY,
"Text Files: (*.txt)|*.txt||");

if(FileDialog.DoModal() == IDOK)
{
CString path = FileDialog.GetPathName();
SetWindowText (path);
CEdit* cedit;
cedit = reinterpret_cast<CEdit *>(GetDlgItem(IDC_EDIT1));
cedit->SetWindowText(path);



}
}

void CColourdlg::OnPlot() //PLOT BUTTON
{
// TODO: Add your control notification handler code here
int i=0;
double array[10];
char cNum[10];
ifstream ifs;
ofstream ofs;

ifs.open(m_path,ios::nocreate); //m_Path is a variable atached
//to edit box but i am not able
// to get the path of the txt fil
while (ifs.good())
{
ifs.getline(cNum,256,' ');
array[i]= atof(cNum);
i++;

}
//OnOK();


}

[tarkes]

I got how to take from edit box the path of the selected file...

Now i am stuck in reading the text file

My data is somewhat like this

24.54 /t 45.54 /t 34.5/t 34.4 /n
......../t..../t......................./n
I have tab delimiters and /n

As i could find i need to use ifstream, vector and string..
istream::getline function doesnot work as expected ..
Can any one help me out in this aspect.. please...

[kbw]

If you don't care about the lines, you can just read each value in a loop. If the lines are significant, you need to read an entire line at a time, then read the value from that as in:

#include <fstream>
#include <sstream>
#include <string>

int main()
{
	std::string line;
	std::ifstream is("test.csv");
	while (std::getline(is, line))	// read one line at a time
	{
		double value;
		std::istringstream iss(line);
		while (iss >> value)	// read one value at at time from the line
		{
			;		// do something with the value
		}
	}

	return 0;
}

[tarkes]

ok

[tarkes]

ok

[tarkes]

iss>>value... doesnot works it says illegal left operand is double

[tarkes]

Yess now the code works properly.. small mistakess.. now its fine

[tarkes]

When i click the dialog box open and does processing and a 2D vector lies in the dialog pushbutton function. How do i send it to ONDRAW function defined in VIEW.CPP file There i will plot this vector in terms of pixels.. Can u please suggest me with small example code to be written in pushbutton() and ONDRAW().. I would be highly thankful to u.. Please help me out!

[kbw]

You don't talk to views, to talk to the document. You need to call UpdateAllViews on the document. That causes the views to refresh.