Question about pointers.

[Brian Alvarez]

 In my opinion, the second print statement of the following code should print 101 ("e"), instead it prints 72 ("H").

Code: [Select]

        string ss = "Hello World"
        byte ptr bb = strptr(ss)
        long ii = 1
       
        print bb[ii+1] cr     ' Correctly prints 101
        print bb[(ii+1)] cr   ' IMO, should print 101, but prints 72.
        print bb[(ii)+1] cr   ' Correctly prints 101
 I would guess no inline math is allowed in squared brackets, as i kind of recall reading a year or so ago, but the other additions work fine. What causes the inconsistency?

[JRS]

I would be interested to know what you get with this statement.

print bb[(ii+1)+0]

Do nothing () may be the issue Charles didn't anticipate.

PRINT ((1+1)) seems like the same direction.

[Charles Pegge]

The problem was an excessive indexer optimisation. It is quite easy to fix

[Brian Alvarez]

 Thanks Charles. I think you also experience the same things as me... usually removing stuff fixes it. 

[JRS]

I was curious how ScriptBasic would handle my silly example. Glad to see it's smarter than the programmer. 

Code: Script BASIC

1. PRINT ((1+1)),"\n"

C:\ScriptBASIC\examples>sbc ()test.sb
2

C:\ScriptBASIC\examples>

[Brian Alvarez]

I was curious how ScriptBasic would handle my silly example. Glad to see it's smarter than the programmer. 

Code: Script BASIC

1. PRINT ((1+1)),"\n"

C:\ScriptBASIC\examples>sbc ()test.sb
2

C:\ScriptBASIC\examples>

 

[Nicola]

Hello.

Code: OxygenBasic

1. use console
2.  
3. string ss = "Hello World"
4. byte ptr bb = strptr(ss)
5. long ii = 1
6.      
7. print bb[ii+1] cr     ' Correctly prints 101
8. print bb[(ii+1)] cr   ' IMO, should print 101, but prints 72.
9. print bb[(ii+1)+0] cr ' prints 101
10. print bb[(ii)+1] cr   ' Correctly prints 101
11.  
12. waitkey
13.