CODEWITHSUNDEEP
c++visual-studio-2013mfc
Muhammad Raza
Muhammad Raza

Reputation: 907

What is CStringArray or CSortStringArray. And how to arrange this array in order?

The problem is how to arrange order if i just used CStringArray not CSortStringArray the arrangement of first array sortarray is from (a to m) in order. But if i used CSortStringArray still the arrangement is same. And second array sortarray1 from 1.txt to 15.txt the order is always wrong either using CStringArray or CSortStringArray? 

void CtestmfcDlg::OnBnClickedOk()
    {
        CSortStringArray sortArray;
        sortArray.Add(CString("a"));
        sortArray.Add(CString("b"));
        sortArray.Add(CString("c"));
        sortArray.Add(CString("d"));
        sortArray.Add(CString("e"));
        sortArray.Add(CString("f"));
        sortArray.Add(CString("g"));
        sortArray.Add(CString("h"));
        sortArray.Add(CString("i"));
        sortArray.Add(CString("j"));
        sortArray.Add(CString("k"));
        sortArray.Add(CString("l"));
        sortArray.Add(CString("m"));

        CSortStringArray sortArray1;

        sortArray1.Add(CString("1.txt"));
        sortArray1.Add(CString("2.txt"));
        sortArray1.Add(CString("3.txt"));
        sortArray1.Add(CString("4.txt"));
        sortArray1.Add(CString("5.txt"));
        sortArray1.Add(CString("6.txt"));
        sortArray1.Add(CString("7.txt"));
        sortArray1.Add(CString("8.txt"));
        sortArray1.Add(CString("9.txt"));
        sortArray1.Add(CString("10.txt"));
        sortArray1.Add(CString("11.txt"));
        sortArray1.Add(CString("12.txt"));
        sortArray1.Add(CString("13.txt"));
        sortArray1.Add(CString("14.txt"));
        sortArray1.Add(CString("15.txt"));



        for (int i = 0; i <= sortArray.GetUpperBound(); i++)
            {
                testbox1.AddString(sortArray[i]);
            }
            //sortArray.Sort();

            for (int j = 0; j <= sortArray1.GetUpperBound(); j++)
            {
                testbox2.AddString(sortArray1[j]);
            }

   }

Upvotes: 2

Views: 1189

Answers (2)

Barmak Shemirani
Barmak Shemirani

Reputation: 31629

If minimum system requirement is Vista or higher then you can use CompareStringEx.

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include "windows.h"

using namespace std;

int wmain()
{
    vector<wstring> sa;
    wchar_t temp[50];
    for (int i = 12; i > 0; i--)
    {
        wsprintf(temp, L"%d.txt", i);
        sa.push_back(temp);
    }

    struct {
        bool operator()(const wstring &a, const wstring &b) {
            return CompareStringEx(0, SORT_DIGITSASNUMBERS,
                a.c_str(), a.length(), b.c_str(), b.length(), 0, 0, 0) == CSTR_LESS_THAN;
        }
    } mysort;
    sort(sa.begin(), sa.end(), mysort);

    for (size_t i = 0, count = sa.size(); i < count; i++)
        wcout << sa[i] << endl;

    return 0;
}

output:

1.txt
2.txt
3.txt
...
9.txt
10.txt
11.txt
12.txt

Upvotes: 1

Blacktempel
Blacktempel

Reputation: 3995

You cannot expect from a String sorting algorithm that it sorts Integers.

Filename 10.txt will return at position [0] compared to 2.txt that it is smaller (see ascii code 49 < 50).

If you want to sort by Integers and not Strings, you have to implement your own sort algorithm.



//To remove the last extension for a file you could use this:

std::string RemoveLastExtension(const std::string &fileName)
{
    auto pos = fileName.rfind(".");
    if (pos == std::string::npos)
        pos = -1;
    return std::string(fileName.begin(), fileName.begin() + pos);
}

Upvotes: 1

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