Qbytearray 与 float , int 等互转

#include <QCoreApplication>

#include <QDebug>

int main(int argc, char *argv[])

{

    QCoreApplication a(argc, argv);

    QByteArray buff;

    float ff = 1.234f, f2;

    int ii = 345,i2;

//    int len = sizeof(int) + sizeof(float);

//    buff.resize(8);

//    qDebug()<< "size=" << buff.size();

    buff.append(reinterpret_cast<const char*>(&ii),sizeof(ii));

    buff.append(reinterpret_cast<const char*>(&ff),sizeof(ff));

//    i2 = *reinterpret_cast<const int*>(buff.data());

//    f2 = *reinterpret_cast<const float*>(buff.data()+sizeof(int));

//    qDebug() << len << " " <<  buff.size() << " " <<  ii << " " << i2 << " " << ff <<" " << f2;

    i2 = *reinterpret_cast<const int*>(buff.data());

    f2 = *reinterpret_cast<const float*>(buff.data()+sizeof(ii));

    qDebug() <<  buff.size() << " " <<  ii << " " << i2 << " " << ff <<" " << f2;

    return a.exec();

}