Reading a file into Qt



I am using Qt5.2.1 and I made a program that stores some data into a file and then reads the data.



```
it stores some variables values.

```

After I restart my program... I want to read those values and re-store the values of those variables... How can I do this? I am fairly new to Qt (programming altogether).


Thank you in advance.


this is some text inside the file -  

500 - 1000 : 29  

1000 - 1500 : 0  

1500 - 2000 : 0  

2000 - 2500 : 0


here the 29,0,0,0 are the values and I would like to assign them to the variables.
It' just standard c++ ifstream and ofstream. When the program starts, try to open the file, if it success then read it.
[image] dueck456:

is there an easy way to detect when new code is flashed to the device so i can reinitialize the retained variables?

below is a link to a post by [@rickkas7](/u/rickkas7) about storing retained data in a struct.

[image] dueck456:

saving a know value to eeprom jumps to mind

there is … c = input()  

t = len(c)  

temp = ""  

for i in range(0,len(c)):  

    if t<3:  

        break  

    else:  

        if i in (0,1,t-2,t-1):  

            temp = temp+c[i]  

        else:  

            continue  

print(temp) for sequence wise validation please choose the validation fold in the range [0, n-1].

then the folder you selected will be a validation set.

if you want to change the validation set, please modify it in the spec manually.

running tlt-evaluate will do validation against the validation set you sp… cheat engine searches through the memory for values that you input, then locates the memory address of them so that you can change that value later on.

for example:

lets say we would cheat in pinball.

in cheat engine you select pinball as the process.

if your score is 10, you search for 10, when cheat engine is done, change the value in the game (get more / less score), then search for that value, after repeating this a few times, it will have found the address to the value of the score. then you can change it to whatever you want, you can do the same for amounts of balls and so on.

i remember i used to cheat in diablo 2 with it, get infinite stat-points and skillpoints, you could even change the experience to instantly get lvl 99, all games uses values for almost everything, (hp, mana, experience, damage) and so on, just gotta find it in ce so you can change it!

there are tutorials on cheat engines webpage.

http://www.cheatengine.org/tutorials.php the compiler will throw the following errors:  


10: error: increment of read-only variable **k**,  


12: error: **lvalue** required as increment operand. i use a mac as well. you can set textedit to ‘plain text’ instead of ‘rich text’ and make sure it’s saving as a utf-8 .txt file in the preferences, but there isn’t an easy way to show the line numbers. if it’s saving as .rtf, that might be one reason your code isn’t working for you currently.

as fo… you can use the repmat function here
if you have to print the patter n (here 10) times, use the following code:
a = [5 4 3 2 1 0]';
n = 10;
b =repmat(a, n,1) How you do this will depend on a number of factors: since you haven't tried to explain in any detail, I'll assume you know nothing, and just give you the basics.  

  

The easiest way to do this is to read the text file into a single string, and then use the .NET framework to find the match:  


```
Dim text As String = File.ReadAllText("D:\Temp\MyFile.txt")
Dim index As Integer = text.IndexOf("hello")
If index >= 0 Then
   ' String is in file, starting at character "index"
End If
```
  

There are other ways, but that is pretty much the simplest. hello,

there are more possibilities how write output to file. first is by standard methods of jscript by “scripting.filesystemobject”.

var fso = new activexobject(“scripting.filesystemobject”);

var forreading = 1;

var forwriting = 2;

if (fso.fileexists(‘c:\test.txt’))

var f1 = fso.opentextfile… well, transferring your data and transferring that and your settings are different. data, such as music, letters, video, pictures can burn to disk or copy/move to external drive. installed applications won't go, you'll have to reinstall from disk or download. on the other hand, you can transfer settings, favorites etc. use files and settings transfer wizard. or laplink software and cable.