#include <QPushButton>#include <QSlider>#include <QLabel>#include <QDial>#include <QLCDNumber>#include <QVBoxLayout>#include <QHBoxLayout>#include <QGridLayout>#include <QSettings>#include <QApplication>#include <QCoreApplication>#include <unistd.h>#include <sys/types.h>#include "CopServ.h"CopServ::CopServ() : QWidget(){    createScreen();}void CopServ::createScreen(){    QPushButton* celBtn = new QPushButton("Cel");    QPushButton* fahBtn = new QPushButton("Fah");    QPushButton* quitBtn = new QPushButton("Quit");    QGridLayout *mainLayout = new QGridLayout;    mainLayout->addWidget(celBtn, 0, 0);    mainLayout->addWidget(fahBtn, 0, 1);    mainLayout->addWidget(quitBtn, 1, 0);    setLayout(mainLayout);    connect(celBtn, SIGNAL(clicked()), this, SLOT(launchCel()));    connect(fahBtn, SIGNAL(clicked()), this, SLOT(launchFah()));    connect(quitBtn, SIGNAL(clicked()), qApp, SLOT(quit()));    setGeometry(0, 50, 240, 320);    setWindowTitle("Server Window");}void CopServ::launchApp(const char* path){    if (path == NULL)    {        qDebug("Launch path is NULL!\n");    }        pid_t pid = fork();    if (pid == 0)    {        qDebug("new process forked. PID is:%d\n", getpid());        int result = execl(path, path, 0);        if (result < 0)        {            qDebug("failed to launch application!\n");        }        _exit(-1);    }}void CopServ::launchCel(){    launchApp("./cel/cel");}void CopServ::launchFah(){    launchApp("./fah/fah");}