Undefined reference to myclass::myfunction error

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I am starting to leran QT. doing small tasks for learning. I am getting error "Undefined reference to mymainwindow::mytestfunctiontocall"
here is my code how i am doing

in mymainwindow.h

public
     void mytesfunctioncall();

in mymainwindow.cpp

void myMainwindow::on_Push_Button_clicked()
{
    mytestfunctiontocall()
}
mytestfunctiontocall()
{
   qDebug() << "Hello world msg";
}

Posted 18-Nov-15 0:29am

XamBEE

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2 solutions

Solution 1

Quote:
public
void mytesfunctioncall();

This is not valid C++ code.
It is better if you post the actual code, in order to get proper help.

Posted 18-Nov-15 0:42am

CPallini

v2

Comments

XamBEE 18-Nov-15 6:53am

its
class Mainwindow:public QMainWindow
{
public:
void mytesfunctioncall();
}
in mainwindow.h file

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Richard MacCutchan · Accepted Answer · 2015-11-18T00:56:00

Most of that code is wrong, you should spend more time studying C++ before trying to learn Qt.
Assuming that your header file contains a proper class declaration for myMainwindow, then the .cpp file should look something like the following, and use the same method name as declared in the header:

C++

void myMainwindow::on_Push_Button_clicked()
{
    mytesfunctioncall();
}
void myMainwindow::mytesfunctioncall()
{
   qDebug() << "Hello world msg";
}