HP 49g+, Руководство пользователя, Страница: 679 / 862

Page 21-34
Note
: For mathematical operations with tagged quantities, the calculator will
"detag" the quantity automatically before the operation. For example, the left-
hand side figure below shows two tagged quantities before and after pressing
the
*
key in RPN mode:
Examples of tagged output
Example 1 – tagging output from function FUNCa
Let’s modify the function FUNCa, defined earlier, to produce a tagged output.
Use
‚
@FUNCa
to recall the contents of FUNCa to the stack. The original
function program reads
«
“
Enter a:
“
{
“
:a:
“
{2 0} V } INPUT OBJ
→ →
a
«
‘
2*a^2+3
‘
NUM
» »
Modify it to read:
«
“
Enter a:
“
{
“
:a:
“
{2 0} V } INPUT OBJ
→ →
a
«
‘
2*a^2+3
‘
NUM
”
F
” →
TAG
» »
Store the program back into FUNCa by using
„
@FUNCa
. Next, run the
program by pressing
@FUNCa
. Enter a value of 2 when prompted, and press
`
. The result is now the tagged result
F:11.
Example 2 – tagging input and output from function FUNCa
In this example we modify the program FUNCa so that the output includes
not only the evaluated function, but also a copy of the input with a tag.
Use
‚
@FUNCa
to recall the contents of FUNCa to the stack:
«
“
Enter a:
“
{
“
:a:
“
{2 0} V } INPUT OBJ
→ →
a
«
‘
2*a^2+3
‘
NUM
”
F
” →
TAG
» »
Modify it to read:
«
“
Enter a:
“
{
“
:a:
“
{2 0} V } INPUT OBJ
→ →
a
«
‘
2*a^2+3
‘
EVAL
”
F
” →
TAG a SWAP
» »