#include <QtCore/QCoreApplication>
#include <QFile>
#include <QDataStream>
#include <QString>
#include <iostream>
using namespace std;
class Dog {
public:
Dog() { _number = 0; }
Dog(int number, const QString &name)
{
_number = number;
_name = name;
}
void setNumber(int number)
{
_number = number;
}
int number() const { return _number; }
void setName(const QString &name)
{
_name = name;
}
QString name() const { return _name; }
private:
int _number;
QString _name;
};
QDataStream &operator<<(QDataStream &out, const Dog &dog)
{
out << dog.number() << dog.name();
return out;
}
QDataStream &operator>>(QDataStream &in, Dog &dog)
{
int number = 0;
QString name;
in >> number >> name;
dog.setNumber(number);
dog.setName(name);
return in;
}
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QFile file("data.dat");
Dog dog1(1, "caterpillar");
Dog dog2(2, "momor");
if(!file.open(QIODevice::WriteOnly))
{
cerr << "Cannot open file for writing: "
<< qPrintable(file.errorString()) << endl;
return false;
}
QDataStream out(&file);
out.setVersion(QDataStream::Qt_4_3);
out << dog1 << dog2;
file.close();
if(!file.open(QIODevice::ReadOnly))
{
cerr << "Cannot open file for reading: "
<< qPrintable(file.errorString()) << endl;
return false;
}
QDataStream in(&file);
in.setVersion(QDataStream::Qt_4_3);
in >> dog1 >> dog2;
cout << dog1.number() << ", " << qPrintable(dog1.name()) << endl
<< dog2.number() << ", " << qPrintable(dog2.name()) << endl;
return a.exec();
}
