Using Object in another function within the class

[Metshiix]

hello guys! i have a problem, i want to use the server and client object that i create in connectUDP function in my updateChat function but the compiler says that client and server are undeclared. how can i fix this (line 41, 42, 43 error)

#include "myudp.h"
#include <QDebug>

MyUDP::MyUDP(QObject *parent)
    : QObject{parent}
{
    socket = new QUdpSocket(this);
    connect(socket, &QUdpSocket::readyRead, this, &MyUDP::Read);
}

void MyUDP::initServer()
{
    socket->bind(QHostAddress::LocalHost, 7755);
}

void MyUDP::sendMessage(double value)
{
    qDebug() << value; //ok but cant read
    QByteArray Data;
    Data.append(value);
    socket->writeDatagram(Data, QHostAddress::LocalHost, 7755);
}

void MyUDP::Read()
{
    m_Recieved.resize(socket->pendingDatagramSize()); //damit keine infos verloren gehen, wenn daten zu lang sind
    socket->readDatagram(m_Recieved.data(), m_Recieved.size(), &m_sender, &m_senderPort); //readDatagramm befüllt sozusagen das recieved

    emit giveReadValues(m_Recieved, m_sender, m_senderPort);
}

void MyUDP::connectUDP()
{
    MyUDP server;
    MyUDP client;
    server.initServer();
}

void MyUDP::updateChat(double pm10, double pm25)
{
    client->sendMessage(pm10);
    client->sendMessage(pm25);
    server->Read();
}

hope someone can help me. thanks!

[Christian Ehrlicher]

@Metshiix said in Using Object in another function within the class:

MyUDP server;
MyUDP client;
server.initServer();

Basic c++ - what's the lifetime of those two variables?

client->sendMessage(pm10);
server->Read();

dito - where are those pointers initialized?

[Metshiix]

@Metshiix that "->" is just false, i tried something out. Has no meaning in the code. Those arent pointers, just errors.

[SGaist]

Hi,

The question stays valid. You create client and server on the stack in a function hence what are the scope of these variables ?

[Pl45m4]

@Metshiix said in Using Object in another function within the class:

how can i fix this (line 41, 42, 43 error)

Look at your variable socket and the places where you are using it.
Then look at server and client again. Able to spot any difference?!
Also, what @Christian-Ehrlicher and @SGaist have said.