#include "CEpsonEscControl/cepsonesccontrol.h"
...
...

int main(int argc, char *argv[])
{
    ...
    ...
    
    CEpsonEscControl m_ctrl;
    m_ctrl.setPortName("COM1");
    if(!m_ctrl.openSerialPort(QSerialPort::WriteOnly)) {
        qDebug() << "open fails";
        ...
        ...
    }
    int sendBytes = m_ctrl
            .c_init()
            .c_addFont("im mark")
            .c_objLayout('c')
            .c_beginFontSize(2)
            .c_addFont("big font")
            .c_endFontSize()
            .c_lineSpace_b(2)
            .c_addFont("我是繁體中文 hello!!")
            .c_cutPaper(false,1,20)
            .sendBufferToPrinter();
    qDebug() << "actual send = " << sendBytes;


    ...
    ...
}