Using large data structure for storage!

[Kushan]

@jsulm
1)the error is "This application has requested runtime to terminate it in an unusual way!"
2)I will give part of a code-
QList<QStringList> sample;

QStringList List;

List="Testing";

for(int i=0;i<number;i++){
sample<<List;
}

Here number refers to the value entered through line edit(i.e 100 in my scenario)

[jsulm]

@Kushan This code isn't going to compile as "List="Testing";" is invalid.
Would be nice if you would post part of your real code or at least a sample code which you tested and verified that it is crashing.
Did you try to debug your app to see where exactly it is crashing? This is first thing to do in such a situation.

[Kushan]

@jsulm

Sorry I made a mistake(The above mentioned error still exists;) the code is

QList<QStringList> sample;
QString Test="Testing";
QStringList List;

for(int i=0;i<number;i++){
List<<Test;
}

for(int i=0;i<number;i++){
sample<<List;
}

[jsulm]

@Kushan I tested this code: it does not crash (and I don't see why it should).
As I said you should first debug to see where it actually crashes.
And you still did not say how big your strings are. If they are huge then maybe your app gets out of memory and is terminated by the OS.

[Kushan]

@jsulm No this is just a sample the actual QString is very long :(

[jsulm]

@Kushan How long?

[Kushan]

@jsulm actually
QString Test="New,0,0,Instrument1,Order,Buy,100,Amend, Quote"

[jsulm]

@Kushan That's not long.
Please debug you app to see where it is crashing. I'm out of ideas as the code you posted doesn't crash and there is not enough information to tell you why your app is crashing.

[Kushan]

@jsulm Thanx alot how to use the debug?

[jsulm]

@Kushan Take a look at http://doc.qt.io/qtcreator/creator-debugging-example.html
and http://doc.qt.io/qtcreator/creator-debugging.html

[Kushan]

@jsulm Thanx for sparing your time

[jsulm]

@Kushan No problem

[Kushan]

@jsulm Actually the error is indexout of bound but I havent declared any size anywhere in my code for all the structures I have used!

[jsulm]

@Kushan Are you accessing list elements using [] anywhere in your code like

QList<QString> list;
qDebug() <<list[0];

?

[Kushan]

@jsulm yes :( But the problem is that I have never declared a specific size but only used size() method in for loops!

[Kushan]

@jsulm Got it solved it was in the textfile that I used to read into the QList because the value I gave is more than the number of elements in the text file that I read!