#include <QtNetwork>#include <cstdlib>#include "clientsocket.h"using namespace std;ClientSocket::ClientSocket(QObject *parent)    : QTcpSocket(parent){    connect(this, SIGNAL(readyRead()), this, SLOT(readClient()));    connect(this, SIGNAL(disconnected()), this, SLOT(deleteLater()));    nextBlockSize = 0;}void ClientSocket::readClient(){    QDataStream in(this);    in.setVersion(QDataStream::Qt_4_1);    if (nextBlockSize == 0) {        if (bytesAvailable() < sizeof(quint16))            return;        in >> nextBlockSize;    }    if (bytesAvailable() < nextBlockSize)        return;    quint8 requestType;    QString from;    QString to;    QDate date;    QTime time;    quint8 flag;    in >> requestType;    if (requestType == 'S') {        in >> from >> to >> date >> time >> flag;        srand(from.length() * 3600 + to.length() * 60 + time.hour());        int numTrips = rand() % 8;        for (int i = 0; i < numTrips; ++i)            generateRandomTrip(from, to, date, time);        QDataStream out(this);        out << quint16(0xFFFF);    }    close();}void ClientSocket::generateRandomTrip(const QString & /* from */,        const QString & /* to */, const QDate &date, const QTime &time){    QByteArray block;    QDataStream out(&block, QIODevice::WriteOnly);    out.setVersion(QDataStream::Qt_4_1);    quint16 duration = rand() % 200;    out << quint16(0) << date << time << duration << quint8(1)        << QString("InterCity");    out.device()->seek(0);    out << quint16(block.size() - sizeof(quint16));    write(block);}