First published on MSDN on Jul 06, 2015
Authored by Nonki Takahashi
In this blog, Vijaye Raji wrote about arguments in Small Basic v0.1 (to v0.5). But from v0.6, the interface has been changed. So I will rewrite his article for current version of Small Basic.
The
Program
object in the standard library allows you to work with Command Line Arguments from inside a Small Basic program. The
Program
object includes a
ArgumentCount
property that gives the total number of arguments passed to the program, and a
GetArgument(index)
operation that allows you to access each of these arguments using their index.
The following program prints out all the prime numbers less than the number passed at the command line.
If
(
Program
.
ArgumentCount
=
1
)
Then
maxNumber
=
Program
.
GetArgument
(
1
)
If
(
maxNumber
<
2
)
Then
TextWindow
.
WriteLine
(
"No Primes less than 2."
)
EndIf
For
i
=
2
To
maxNumber
CheckPrime
(
)
If
(
isPrime
=
"True"
)
Then
TextWindow
.
WriteLine
(
i
)
EndIf
EndFor
Else
TextWindow
.
WriteLine
(
"Usage: prime count"
)
EndIf
Sub
CheckPrime
isPrime
=
"True"
For
j
=
2
To
Math
.
SquareRoot
(
i
)
If
(
Math
.
Remainder
(
i
,
j
)
=
0
)
Then
isPrime
=
"False"
EndIf
EndFor
EndSub
In this program, Small Basic tries to coerce any passed argument as a number. If you try passing a non-number, the program ends up with “0” and will print out “No Primes less than 2.”
For example:
C:\Users\Nonki\Documents>prime 5
2
3
5
Press any key to continue...
See Also
