skill small question BUG or Specification ?

I using skill language on IC5.0.33_USR3.16.35

The evalstring function is used to convert the character string into
the
numerical value.

There is a thing with a not correct return value.

110

What is this?

 

This is one of the two common surprises that a new comer would see in SKILL.
The thing is when the numerical value in the string is preceded by zero
it is evaluated as octal code.

The other surprise you may see in future is with the internal
representation of floating point numbers and their print values.
Search the older forums for this topic also to save your precise time.

regards,
Suresh

 

This is one of the two common surprises that a new comer would see in SKILL.
The thing is when the number in the string starts with a zero
it is evaluated as octal code. [This is documented in Skill Users Guide.
0x is used for Hexadecimal]

The other surprise you may see in future is with the internal
representation of floating point numbers and their print values.
Search the older forums for this topic also to save your precious time.

regards,

 

This is not unusual either - other languages (Tcl for example) do the same
sort of thing. It's something that always used to come up when I was actively reading the
tcl newsgroup.

I would generally advise against using evalstring to convert numbers. What happens if the string
you're converting contains the value "(exit)", for example...

You can use atoi() to convert strings to integers, and this always works in base 10.

Regards,

Andrew.

 

Absolutely. Preceding an integer with a zero is a pretty standard way of
indicating that it is octal, not decimal (although whether it is intuitive if
you're not a programmer is debatable). Same thing as using '0x' for hex, but
less obvious since there is no visual separator between the prefix and actual
number (like the 'x' in 0x1234). Perl is exactly the same.

Graeme.

 

thanks !

My doubt was solved.

 

It's correct. The leading zero means Octal (base 8). 010 == 8.

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()

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