I've placed a CSV file into an array with C++ with each row being a single array element, but the file contains many, many columns that I don't need. I only need columns 1,2,3,4,6,7 out of about 50. Is is best to read the full value into the array and then edit it or only read in those values that I need?

Remember I'm new at this, so I'm sure my code is horrible. This is in Visual Studio 2005. The Console::WriteLine and the cout of the lineCount are only for my purposes to make sure the program was actually working. They will be removed later.

C++ Syntax (Toggle Plain Text)

 
#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
using namespace System;
using namesapce System::IO;
using namespace System::Collections;
 
int _tmain()
{
StreamReader^ reader;
int lineCount = 0;
reader = gcnew StreamReader("<a rel="nofollow" href="http://www.daniweb.com/techtalkforums/" target="_blank">\\\\<server>\\<file>.csv</a>");
String^ data;
 
ArrayList^ theArray = gcnew ArrayList(lineCount);
 
while(0<reader->Peek())
{
data = reader->ReadLine();
theArray->Add(data);
Console::WriteLine(theArray[lineCount]);
lineCount++;
}
 
cout << lineCount << endl;

#include "stdafx.h" #include <iostream> #include <string> using namespace std; using namespace System; using namesapce System::IO; using namespace System::Collections; int _tmain() { StreamReader^ reader; int lineCount = 0; reader = gcnew StreamReader("<a rel="nofollow" href="http://www.daniweb.com/techtalkforums/" target="_blank">\\\\<server>\\<file>.csv</a>"); String^ data; ArrayList^ theArray = gcnew ArrayList(lineCount); while(0<reader->Peek()) { data = reader->ReadLine(); theArray->Add(data); Console::WriteLine(theArray[lineCount]); lineCount++; } cout << lineCount << endl;

I've placed a CSV file into an array with C++ with each row being a single array element, but the file contains many, many columns that I don't need. I only need columns 1,2,3,4,6,7 out of about 50. Is is best to read the full value into the array and then edit it or only read in those values that I need?

This depends on what you are going to do with the data read. If you are going to edit the data in those columns and write it back to a file, along with the rest of the columns, you will have to read and store all the data. If you only want the values, and they are discarded after use, you can create an array of only 6 elements with multiple rows, and store the columns you need to that array.

Remember I'm new at this, so I'm sure my code is horrible. This is in Visual Studio 2005. The Console::WriteLine and the cout of the lineCount are only for my purposes to make sure the program was actually working. They will be removed later.

This response doesn't seem to answer any of WolfPack's questions. We still don't know enough to answer your question. And yes, your format is horrible. After every { indent 4 spaces. Before every } unindent. Then you program can be followed.