connect(ui.button0,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button1,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button2,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button3,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button4,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button5,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button6,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button7,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button8,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button9,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button10,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button11,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button12,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button13,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button14,SIGNAL(clicked()),this,SLOT(digitClicked()));
connect(ui.button15,SIGNAL(clicked()),this,SLOT(digitClicked()));
还有像上面的代码 如何修改得最短