C++ 如何在qt GUI应用程序中使用null初始化数组？

这是我想要的数组的初始化。我试着把main.cpp和我的头文件qt creator放进去，以显示错误

这是我的.h头文件代码：

char totalbuffer[2048] = {0};

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我认为初始化列表不能放在头文件和main.cpp中，那么如何初始化数组呢？与C++ VisualStudio一样，使用公共变量…

< P>可以使用MeSET或B0UCH函数

error assigning to an array from an initializer list

或

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<>这与QT无关，但基本C++。

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类成员在构造函数中初始化。您可以在那里使用

std:：fill

。

为什么不显示错误？另外，您应该使用

QString

或

QByteArray

来操作字符数组。显示什么错误？请用更完整的代码（最好是a）编辑您的问题，同时请添加完整的和未编辑的错误列表。对不起，伙计们，我已经编辑过了。我正在开发一个QtGUI应用程序，有一个main.cpp qtproject2.h qtproject2.cpp我不知道该放在哪里作为公共初始化列表

    #include "qtproject2.h"
    #include <QApplication>

    int main(int argc, char *argv[])
    {
        QApplication a(argc, argv);
        QtProject2 w;
        w.show();
        char totalbuffer[2048]={0};
        return a.exec();
    }

QtProject2::QtProject2(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::QtProject2)
{
    ui->setupUi(this);

}

QtProject2::~QtProject2()
{
    delete ui;
    QtProject2 Client2;
    Client2.close();

}


void QtProject2::startTransfer()
{
  ui->slabel->setText("Connected!");
}

void QtProject2::disconnected()
{
    ui->slabel->setText("Disconnected!");
}

void QtProject2::readyRead()
{

    client->waitForBytesWritten(1000);
    client->waitForReadyRead(3000);
    char CustomerData_MacAdd[][18]={"14:13:12:11:67:11","52:22:22:22:22:22", "14:22:44:55:22" };
    char CustomerData_Username[][10]={"Robert","Alex","Ivan"};

    QByteArray buffer1 = client->readLine();
    char *temp = buffer1.data();
    char buffer[1024]={0};

    if (strncmp(temp,"*CLIENT",6)==0)
    {
        int j;
        for(j=9;j<26;j++)
        { buffer[j-9]=temp[j];}
    }else if(strncmp(temp,"*ALERT",5)==0)
    {
        int j;
        for(j=8;j<25;j++)
        {buffer[j-8]=temp[j];}
    }

    //char totalbuffer[2048]={0};

    int k;
    for (k=0;k<3;k++){
              if (strncmp(buffer,CustomerData_MacAdd[k],16)==0){
                  strncat(totalbuffer,"User is in Queue : ",19);
                  strncat (totalbuffer,CustomerData_Username[k],size_t(CustomerData_Username[k]));
                  strncat(totalbuffer,"\n",2);

                  ui->label->setText(totalbuffer);

        }}

    ui->slabel->setText(buffer1);

}

void QtProject2::on_pushButton_clicked()
{ 
    client = new QTcpSocket(this);
    connect(client, SIGNAL(connected()),this, SLOT(startTransfer()));
    connect(client, SIGNAL(disconnected()), this, SLOT(disconnected()));
    connect(client, SIGNAL(readyRead()), this, SLOT(readyRead()));


    /*Connect to User Define Port Address*/
    client->connectToHost("127.0.0.1", 1234);
}

error assigning to an array from an initializer list

memset((void*)&totalbuffer, 0, sizeof(totalbuffer));

bzero((void*)&totalbuffer, sizeof(totalbuffer));