Arithmetical expressions

Many input values can be entered as expressions, for instance

USCALE = 100*2

 

Allowed operators are: + - * /

 

1) - as a range separator takes precedence over - as a negative.

IAFILE=*

1-10 2-2

*

1-10 is the item range 1 to 10, and then 2-2 is the value 0.

 

2) no blanks or tabs are allowed between operators and numbers:

valid:  2*2

invalid: 2 * 2

 

3)  error codes include:

1: one of ^*/-+ followed by one of /^

2: one of ^*/-+" followed by *, or ***

4: floating point operators d, e, D, E must be followed by + or -

8: leading or trailing operators not allowed: ^*/-+

9: division by zero /0

10: operator ^*/-+ expected between numbers. No blanks allowed.

11: parenthesis or blank in unexpected place

13: unexpected character, such as A, in your arithmetic expression