|Command||ue.0190 User Exit/PROC
Applicable release versions: R83 3.1, R83 3.0, R83 2.2
|Description||performs arithmetic on a reverse-Polish notation string which has been built in the current output buffer.
"string.delimiter" is a single-character delimiter which may be any character of the user's choosing, as long as it does not appear in the calculation string.
"calculation.string" is the arithmetic function to perform, in reverse-Polish notation. It is built in the primary input buffer prior to the user exit call. The final argument in the calculation string is always a "?" to indicate that the calculation is to be performed.
The line following the user exit contains the closing string.delimiter.
"output.target" specifies where the output is to be placed. "Output.targets" are : "S" for current output buffer, "P" for primary input buffer, "A" for secondary output buffer. Any other entry is taken to mean output to terminal, however "T" is usually used.
The calculation string is evaluated, the input buffer is cleared, and the result is output to the specified "output.target".
The following arithmetic operators are available for use within the calculation string:
& Logical AND.
! Logical OR.
< Less than.
<= Less than or equal to.
= Equal to.
= Not equal.
>= Greater than or equal to.
> Greater than.
< Not less than.
> Not greater than.
001 pq 002 OEnter A and B 003 ip 004 st on 005 h: 006 a1 007 h 008 a2 009 h + 010 a1 011 h 012 a2 013 h - * ? 014 u0190 015 : t 016 x Builds the calculation string ":<a><b>+ <a><b>- * ?:", which evaluates to "(<a>+<b>) * (<a>-<b>)" 002 s2 003 h: 0 ? 004 u0190 005 : P Places a zero in the second position of the primary input buffer.