error while accessing STRUCT alement in qt .cpp file

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Hi,
I am trying to get STRUCT value in my .cpp file but dont know exactly how to do this because i am using this first time.
here is the code how i am trying to do..
in WorkerThreadClass.h file

class WorkerThreadClass : public QObject
{
    Q_OBJECT
public:
    explicit WorkerThreadClass(QObject *parent = 0);
    struct WorkerThreadStr
    {
    double SyncTimeMilliSec;

    }workerthreadstr;

in WorkerThreadClass.cpp file

WorkerThreadClass::WorkerThreadStr.SyncTimeMilliSec=14989897.1005; // going to assign value to the struct element

when i try to COUT the value of the struct element to check outout is empty. would be nice if you can guide me with your experience how to go with it??

Posted 20-Jan-16 6:36am

XamBEE

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CPallini 20-Jan-16 12:42pm

Could you please show the code you use for checking the value?

XamBEE 20-Jan-16 12:48pm

just trying to check the value
std::cout << WorkerThreadClass::WorkerThreadStr.SyncTimeMilliSec << "\n";

Sergey Alexandrovich Kryukov 20-Jan-16 13:29pm

It should not even compile because SyncTimeMilliSec is an instance (non-static) member.
—SA

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Jochen Arndt · Answer 1 · 2016-01-20T09:09:00

See Data structures - C++ Tutorials[^] about structure type names and object names.

In you case WorkerThreadStr is the type and workerthreadstr is an object (here a member of WorkerThreadClass).

So you have to use the object name if you want to assign a value from a class function:

void WorkerThreadClass::SomeFunc()
{
    workerthreadstr.SyncTimeMilliSec=14989897.1005;
}

When using the type outside the class you must declare a variable of the type:

WorkerThreadClass::WorkerThreadStr workerthreadstrVal;
workerthreadstrVal.SyncTimeMilliSec=14989897.1005;

[EDIT]
If you have an instance of your class, access the member via that:

WorkerThreadClass threadClass;
threadClass.workerthreadstr.SyncTimeMilliSec=14989897.1005;
std::cout << threadClass.workerthreadstr.SyncTimeMilliSec << "\n";

[/EDIT]