File operations

[thorunkilici]

Hi friends, my problem is only about file operations. When i type any file operation code, it doesn't create any text file or doesn't edit that i created manually text files...
I searched on web and i tried all solutions but they didn't effect. One of solutions is gave me an error but I didn't look to what was it(it was something like library error)
Between i sent my codes to friends but they worked on their PCs...
Also i am using Dev C++.(tried visual studio too for solve this problem but this didn't change anything for me)
Here is my (creating and) adding to text file function;

void ekleme() {
        cout << "Eklemek istediginiz kullanici adini giriniz: ";
        cin >> kullaniciAdi;
        ofstream kullaniciDos;
        kullaniciDos.open("Kullanicilar.txt", ios::app);
        kullaniciDos << kullaniciAdi;
        kullaniciDos.close();
        cout<<"Kullanici basariyla eklendi!"<<endl;
    }

[Ganado]

Can you show a minimal example that compiles and reproduces the issue?

And please format your code.

[code]

    // { code here }

[/code]

[thorunkilici]

Oops sorry, I didn't understand the question clearly.

#include <iostream>
#include <fstream>
#include <stdlib.h>
#include "string"

void adding() {
string userName;
cout << "Enter your nickname: ";
cin >> userName;
ofstream userFile;
userFile.open("users.txt", ios::app);
userFile<< userName;
userFile.close();
cout<<"The user is succesfully added!"<<endl;
}

[Ganado]

I'm asking for code that I can copy and successfully compile, without needing to modify the code myself.

I cannot reproduce your issue with the following code, based off your excerpt:

#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <string>

using namespace std;

void adding() {
    string userName;
    cout << "Enter your nickname: ";
    cin >> userName;
    ofstream userFile;
    userFile.open("users.txt", ios::app);
    userFile<< userName;
    userFile.close();
    cout<<"The user is succesfully added!"<<endl;
}

int main()
{
    adding();
}

Running this program the first time successfully creates a file, when I entered "hello" as my nickname.
Running the program the second time successfully then continues appending onto the file.

What happens when you run the above code?

[dhayden]

userFile.open("users.txt", ios::app); This opens the file in the current working directory. I suspect that the CWD isn't where you think it is.

[thorunkilici]

I created a new source code with above codes on Dev C++(also opened it as administrator) on my D disc and I give all rights to all users to which folder i save it for be sure. "Ide or compiler didn't give me any error" but "the codes didn't create a text file."

[Ganado]

Good suggestion. Assuming Windows, you can add system("cd"); to your program to print your current working directory. Just as a quick check for debugging.
(On *nix this is system("pwd");)

[thorunkilici]

I added it like that;

#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <string>

using namespace std;

void adding() {
    string userName;
    cout << "Enter your nickname: ";
    cin >> userName;
    ofstream userFile;
    userFile.open("users.txt", ios::app);
    userFile<< userName;
    userFile.close();
    cout<<"The user is succesfully added!"<<endl;
}

int main()
{
	cout<<system("cd");
    adding();
}

and it is same with my .cpp directory. As you saw on the pic https://imgur.com/a/dZfuZve

[Ganado]

I don't know then. The only thing that is odd to me in that picture is that there is a '0' before your "Enter your nickname" text, which suggests that you're running code that doesn't match the above code.

What shows up when you do,

    ofstream userFile;
    userFile.open("users.txt", ios::app);
    if (!userFile)
    {
        cout << "failure\n";
    }
    else
    {
        cout << "success\n";
    }

    if (userFile<< userName)
    {
        cout << "write success\n";
    }
    else
    {
        cout << "write failure\n";
    }

[thorunkilici]

I copied and pasted the last codes from my program already so they must be same. Also the you said quick check but it took about one minute, i don't know is that normal because normally it works after a few seconds.

And the output;

D:\TEST
0Enter your nickname: ali
failure
The user is succesfully added!

[thorunkilici]

After you edit your message i tried the new one and the result a bit changed;

D:\TEST
0Enter your nickname: nick
success
write success
The user is succesfully added!

--------------------------------
Process exited after 46.77 seconds with return value 0

[Ganado]

But still no file exists in D:\TEST? I'm at a dead-end.

Edit:
Just as one more measure.
Add system("dir"); to the end of your program. What files does it show?

[thorunkilici]

Here;

D:\TEST
0Enter your nickname: ss
success
write success
The user is succesfully added!
Volume in drive D is Depo

Directory of D:\TEST

26.05.2020 18:06 <DIR> .
26.05.2020 18:06 <DIR> ..
26.05.2020 18:06 713 deneme.cpp
26.05.2020 18:06 1.922.352 deneme.exe
26.05.2020 18:07 28 users.txt
3 File(s) 1.923.093 bytes
2 Dir(s) 204.726.333.440 bytes free

--------------------------------
Process exited after 118.6 seconds with return value 0

[thorunkilici]

After this result, I opened "Show secret file, folder or drivers" from general folder options. Still I can't see the txt here.

[Ganado]

Well, the file exists in your system. So your program is working correctly.

Do you have a screenshot of your File explorer?

[swordofthor]

Hi it's me again, i don't know why but "thorunkilici" can't reply or creates new topic. I guess because of i tried to paste imgur link again for show inside of the TEST folder.

There are only two files still, deneme.cpp and deneme.exe . So I can't see still...

[swordofthor]

After open "Show secret file, folder or drivers", I can see even secret temp files but i can't see the text file...

[Ganado]

If you open cmd, then cd to D:\TEST, and then do dir, does the file show up in the list?
- If it does, that means it's indeed a display issue with your file explorer
- If it does not show up, it means something else is deleting your file

[swordofthor]

Directory of D:\TEST

26.05.2020 18:39 <DIR> .
26.05.2020 18:39 <DIR> ..
26.05.2020 18:06 713 deneme.cpp
26.05.2020 18:39 1.922.352 deneme.exe
2 File(s) 1.923.065 bytes
2 Dir(s) 208.606.879.744 bytes free

[Ganado]

Okay so now my hypothesis is that something else is deleting your users.txt file without your knowledge.

First, temporarily turn off any anti-virus/anti-malware you have, then re-run the program.

If the problem is still happening, you'll have to try some deeper troubleshooting.
There is a program called procmon by sysinternals (owned by Microsoft) that can monitor a variety of events that processes on your computer are doing.
https://docs.microsoft.com/en-us/sysinternals/downloads/procmon

You can filter process monitor to only show file deletions:
https://blog.zensoftware.co.uk/2013/03/06/support-queries-shared-using-process-monitor-to-see-when-files-are-being-deleted/

This should help figure out what process is deleting your file, if that is in fact what's happening (again, just my hypothesis).