connect(ui->addButton,SIGNAL(clicked()),this,SLOT(add()));
connect(ui->editButton,SIGNAL(clicked()),this,SLOT(edit()));
connect(ui->remButton,SIGNAL(clicked()),this,SLOT(rem()));
connect(ui->addButton,SIGNAL(clicked()),this,SLOT(add()));
connect(ui->editButton,SIGNAL(clicked()),this,SLOT(edit()));
connect(ui->remButton,SIGNAL(clicked()),this,SLOT(rem()));