Listing out the items from a text file

Question

1.00/5 (2 votes)

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i need to list out the items from the notepad in ascending or descending order.
how do i go about doing that. need some codes
ur help is appreciated

C++

int main(int argc, char *argv[]);
{
    std::ifstream output_file("stockdatabase.txt");
    std::string value;
    std::vector<std::string xmlns:std="#unknown"> getItemID;
    if (output_file)
    {
        while (!output_file.eof())
        {
            std::getline(output_file, value, '\n');
            getItemID.push_back(value);
            std::sort(getItemID.begin(), AscendingOrderSorter());
        }
        for (int x = 0; x < stockVectorTemp.size(); x++)
        {
            cout << "[" << x+1 << "]\t" << stockVectorTemp[x].getItemID()
            << "\t" << stockVectorTemp[x].getTotalQty()
            << "\t\t" << stockVectorTemp[x].getItemDesc() << endl;
        }
        for (int y =0; y>stockVectorTemp.size(); y--)
        {
            cout << "[" << y-1 << "]\t" << stockVectorTemp[y].getItemID()
            << "\t" << stockVectorTemp[y].getTotalQty()
            << "\t\t" << stockVectorTemp[y].getItemDesc() << endl;
        }

Posted 20-Oct-13 21:33pm

Member 10334475

Updated 22-Oct-13 21:28pm

Richard MacCutchan

v3

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Comments

Richard MacCutchan 21-Oct-13 4:05am

Please don't post questions like this, no one is going to write your assignment for you.

Captain Price 22-Oct-13 5:32am

Your Duplicate : http://www.codeproject.com/Questions/670436/need-help-with-codes-on-edit-stock Why are you asking the same question twice ?

Richard MacCutchan 23-Oct-13 3:29am

Your code is incomplete.

Dark Darkling 23-Oct-13 4:36am

No such overloading for std::sort. It's needed to add 'getItemID.end()' as the second parameter.

Richard MacCutchan 23-Oct-13 9:12am

Sorry, what?

Dark Darkling 24-Oct-13 3:53am

Sorry, I commented the code above.

Richard MacCutchan 24-Oct-13 4:21am

What are you talking about?

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Dark Darkling · Answer 1 · 2013-10-21T23:28:00

Solution 1

Just read all items from file to 'std::vector<std::string xmlns:std="#unknown">' and call 'std::sort' function to this vector.

P.S. You could use a predicate for 'std::sort' function to implement your own sorting logic.

Good luck!

Posted 21-Oct-13 23:28pm

Dark Darkling

Comments

Member 10334475 22-Oct-13 5:32am

could u show me the coding? I get the concept but I duno how to begin

Dark Darkling · Answer 2 · 2013-10-22T00:09:00

C++

#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <algorithm>


struct AscendingOrderSorter
{
  bool operator()(const std::string& lhs, const std::string& rhs)
  {
    return lhs < rhs;
  }
};

struct DecsendingOrderSorter
{
  bool operator()(const std::string& lhs, const std::string& rhs)
  {
    return lhs > rhs;
  }
};

struct RowPrinter
{
  void operator()(const std::string& value)
  {
    std::cout << value << "\n";
  }
};

int main(int argc, char *argv[])
{
  std::ifstream input_file("D:\\123.txt");
  std::string value;
  std::vector<std::string> file_data;

  if (input_file)
  {
    while (!input_file.eof())
    {
      std::getline(input_file, value, '\n');
      file_data.push_back(value);
    }
  }
  std::cout << "Before sort: \n";
  std::sort(file_data.begin(), file_data.end(), AscendingOrderSorter());
  // now file_data is sorted.
  std::cout << "After sort: \n";
  std::for_each(file_data.begin(), file_data.end(), RowPrinter());
}