China DOS Union

Mathematical calculation commands bc.exe and lmp.exe | Batch processing calculation tools | Command line calculation tools | Batch processing mathematical operation tools | Mathematical operation command line tools

Piling up the above keywords is only for facilitating others' search. The brief introductions of these two command line tools have been posted on my own blog:

Mathematical calculation command lmp.exe http://hi.baidu.com/yinkeju/blog/item/ffd845105dcd97f0c2ce795b.html

Usage of the batch processing bc command, usage of the dc command http://hi.baidu.com/yinkeju/blog/item/bb29d8b4286f067f8bd4b286.html

Is bc the same as the bc for Unix?

Originally posted by HAT at 2010-4-29 17:03:
Is bc similar to the Unix bc?

Yes
The gunwin32 version

Another download page for bc.exe: http://gnuwin32.sourceforge.net/packages/bc.htm

There is also a command-line tool called MATH.EXE, which has very limited functionality. Since it's not straightforward, it's not recommended.

Is lmp.exe tool Windows version ?

lmp.exe has a WINDOWS version: http://sourceforge.net/projects/lmp/files/

I tried it, very disappointed,
lmp calculates 2+1/3
displays result as 2! Why doesn't it even support floating-point numbers!
bc doesn't support infix expressions, and when calculating, you have to convert infix to postfix by yourself. Who has the mood for that?

Still, math is simple and practical,

Haha, is that so?

I use bc.exe and LMP.EXE very well

Only unhappy with MATH.EXE, too weak in function.

You mean support for floating point numbers means using floating point numbers to represent the calculation result?

My math is miserable, probably not even comparable to junior high school level
==I'll take a look/

Also, lmp.exe has not been updated by anyone since 2001

[ Last edited by yishanju on 2010-5-3 at 22:47 ]

bc.exe is a command for evaluating infix expressions
dc.exe is for postfix

```batch
echo off

lmp -p 20 "2+1/3"
echo lmp.exe is so wronged

pause

\Script\Batch Calculation>echo off
2.33333333333333348136
lmp.exe is so wronged
Press any key to continue. . .
```

...This result actually came out. Sweat

I just saw it now. I was going to add 5 points for you, but it turned into deducting 15 points. So sweaty.

This is how I use BC.exe to calculate factorials..
The BC command is claimed to be an arbitrary-precision calculator,
GUNWIN32's BC.EXE can calculate the factorial of 1800.

setlocal EnableDelayedExpansion

for /l %%a in (2,1,18) do (
set m=!m!*%%a
set a=%%a
)

echo %m%|bc.exe


\Scripts\Batch processing calculation>echo 1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18 | bc.exe
6402373705728000

pause

[ Last edited by yishanju on 2010-5-3 at 23:27 ]

How to make the result of math retain a specified number of decimal places?