Task 4

Extra functionality for DI/High Distinction level)

M   (or m) memory + key (adds display value to memory)

R   (or r) puts contents of memory on display

The memories are (0 to 9) (each is a separate value to be stored in a map structure)

I used the keys M0 , M1 , M2 .... as the key in the map and a double as the value

Therefore after M or R there is now a number indicating the memory number (e.g.  M3 , R0)

After you hit the M or R key I put a M on the display to indicate the next keystroke should be a 0 to 9