The specific task that you will perform is to create a calculator that will add, subtract, multiply, or divide two numbers using a case structure depicted in Fig. 9.14.
This will require that you to use two inputs, an output, and a ring on the front panel.
You will need a case structure in the block diagram window, which initially will
have only two cases {0,1} but can be extended by right-clicking on the condition
statement in the block diagram. The case structure itself can be found in the structures subpalette of the functions palette. The ring should be added to the front panel
of the VI and can be found on the modern subpalette of the controls palette. The
properties dialog box of the ring, which opens up by right-clicking on the ring,
allows you to add cases as you need (in this case, four cases). Make sure the order of
the list on the ring corresponds to the same subset in the case list and that you set a
default case.