계산기 소수좀 봐주실레요~

void mywidget::b_plus()
{
    MMemory = textdisplay->text().toDouble();
    Operation(1);
}

void mywidget::Operation(int i)
{
    float value = 0;
    if(i == 1)
    {
        value = textdisplay->text().toDouble();
        MemoryValue = MMemory+value;
        qDebug("+button ok");
        textdisplay->setText(QString::number(MemoryValue));
 
    }