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Chapter 2

Ex 2.1
  `INT minus thirty five = -35`
Ex 2.2

  (a)
    `1`
  (b)
    `1.0`
  (c)
    `5.0`
  (d)
    `0`
  (e)
    `5`
Ex 2.3

  (a)
    `6`
  (b)
    `-6`
  (c)
    `13.5`
  (d)
    `4.5`

Ex 2.4

  (a)
    `5`
  (b)
    `-45.0`
  (c)
    `-61`

Ex 2.5

  (a)
    `20` `INT`
  (b)
    `1` `INT`
  (c)
    `1.25` `REAL`
  (d)
    `1` `INT`
  (e)
    `17.0` `REAL`
Ex 2.6
  Your answer should be something like this:-

         PROGRAM ex2 6 CONTEXT VOID
         USE standard
         BEGIN
            print(-7 MOD 3);
            print( 7 MOD -3);
            print(-7 MOD -3)
         END
         FINISH

  This will display

               +2          +1          +2

  on your screen.
Ex 2.7
  `REAL two pi = 2 * pi`

Ex 2.8

  (a)
    `4` `INT`
  (b)
    `3.25` `REAL`
  (c)
    `12` `INT`

Ex 2.9

  (a)
    `-3` `INT`
  (b)
    `-9` `REAL`
  (c)
    `2.0` `REAL`
Ex 2.10
  `1.5`

Ex 2.11

  (a)
    `5`
  (b)
    `2`
  (c)
    `345`
  (d)
    `32`
  (e)
    `"1"`
  (f)
    `8`
  (g)
    `0.0`
Ex 2.12
  The first `print` phrase displays

         $0.0000000000000000$

  (16 zeros) and the second displays `+infinity`.
Ex 2.13
  The compiler detects the error and rejects it.
Ex 2.14

  (a)
    The brackets should be replaced with parentheses.
  (b)
    There are more opening than closing parentheses. The first opening parenthesis should be deleted.
  (c)
    The operator `ROUND` has not been declared to use an operand with mode `CHAR`.
  (d)
    The operator `ENTIER` has not been declared for use with an operand with mode `INT`.