Which of the following are incorrect declarations and why?  If you
think a declaration may be correct in a given situation (but not
everywhere) then say what the situation would be.

a) ReAl :: x

    Correct, but quirky.

b) CHARACTER :: name

    Correct.

c) CHARACTER(LEN=10) :: name

    Correct.

d) REAL :: var-1

    INCORRECT - you can't declare an expression.

e) INTEGER :: 1a

    INCORRECT - names must start with a letter.

f) INTEGRAL :: loji

    INCORRECT - there is no statement 'INTEGRAL'.

g) CHARACTER(LEN=5) :: town = "Glasgow"

    Correct, but town will contain "Glasg".

h) CHARACTER(LEN=*), PARAMETER :: city = "Glasgow"

    Correct.

i) INTEGER :: pi = +22/7

    Correct, but not useful - the value of pi will be 3.

j) CHARACTER(LEN=*), PARAMETER :: "Bognor"

    INCORRECT - no constant name was given.

k) REAL, PARAMETER :: pye = 22.0/7.0

    Correct.

l) REAL, PARAMETER :: two_pie = pye*2

    Correct, provided pye is defined previously as a PARAMETER.

m) REAL :: a = 1., b = 2

    Correct, but it is not good practice.

n) CHARACTER(LEN=6) :: you_know = 'y'know"

    INCORRECT - that is a mangled character constant.

o) CHARACTER(LEN=6) :: you_know = "y'know"

    Correct.

p) INTEGER :: ia ib ic id 

    INCORRECT - you can't separate lists by spaces.

q) REAL :: poie = 4.*atan(1.)

    Either - atan is not allowed in initialisation in Fortran 95, but
    is in Fortran 2003.