Example run of assignment 3.
Things to note:
  -cell referencing is legal in get and eval commands (i.e, 'get A1')
  -white space around parentheses is not guaranteed



starting Spreadsheet
set 1 1 5.2
get 1 1
5.2
get A1
5.2
set 1 1 =4 sqrt
eval 1 1
2.0
set 1 1 =-2.5 chs
eval 1 1
2.5
set 1 1 =( 2 + 2 )
eval A1
4.0
set 1 1 =( sin ( 2 - 2 ) - cos ( 3.141593 ) )
eval 1 1
1.0
set 123 2437 3.141593
set 1 1 =(cos(COS123))
eval A1
-1.0
set 1 1 =( sqrt(4) * sin(COS123) + sqr(5) )
eval 1 1
25.0
exiting Spreadsheet