QT Framework beginner level programmatic GUI programming
QPushButton *btnAdd = new QPushButton("+", this);
QPushButton *btnSubtract = new QPushButton("-", this);
QPushButton *btnMultiply = new QPushButton("*", this);
QPushButton *btnDivide = new QPushButton("/", this);
QPushButton *btnClear = new QPushButton("Clear", this);
QPushButton *btnRow = new QPushButton("Add Equation", this);