c++ получение текста с консоли

 double MyFr::GetCashReg(int reg)
 {
 string comm = "getcashreg#";
 comm += ftoa(reg);
 comm += "#";
 comm += "\n";
 pr->write(encodeToKKM(comm.c_str()).c_str());
 char data[1024];
 pr->readLine(data,sizeof(data));
 return atof(data);
 }
 

#include <QCoreApplication>
#include <QProcess>

int main(int argc, char *argv[]) {
        QCoreApplication a(argc, argv);

        QProcess p;
        p.start("/bin/sh");
        p.waitForStarted();

        p.write("echo hello world\n");
        QByteArray reply;
        while (p.waitForReadyRead(3000)) {
                reply += p.readAllStandardOutput();
                if (reply.endsWith('\n'))
                        break;
        }
        qDebug("Reply is '%*s'\n", reply.size(), reply.data());

        p.write("exit\n");
        p.waitForFinished();
        //return a.exec();
}