How can I calculate this?

[junshi]

I can't find out the method of mathematical symbol--- power!
There is no Functin in any RPG references.

I have to do this calculation.

x^y = x multified by x at eight times.
x and y are real numbers.
again,
x^y means "pow(x,y)" in C language.

please Help me.

 

[gpzcrasher]

Try using the exponentiation operator '**'.

i.e.

2**3=8
4**2=16

Hope this helps

--------------------------------
If it ain't broke, don't fix it!

 

[cjkoontz]

If you are good at encorporating c-functions into your RPG programs, you can always use the EXP function. There are others here, too --

http://as400bks.rochester.ibm.com/cgi-bin/bookmgr/BOOKS/QBJATN00/CCONTENTS

 

[junshi]

Huum...
symbol '**' can not work in RPG III.
and "pow(a,b)" subject to a,b are all real number!

 

[gpzcrasher]

True '**' cannot be used in rpgiii.

If your not willing or able to use rpgiv then the only other way I can think off is to use a do loop to multiply x by itself y times.

I have not tried this but I think it should work.

y dowlt 1
mult x x
sub 1 y
enddo


--------------------------------
If it ain't broke, don't fix it!

 

[gpzcrasher]

Sorry that should be DOWGT not dowlt.
--------------------------------
If it ain't broke, don't fix it!

 

[cjkoontz]

I was going to suggest that.

You should probably make it an API, and also consider an if or case statement if the power is --

* 0,
* 1,
* negative.