## Search found 2237 matches

Thu Jul 18, 2024 9:55 pm
Forum: Spectrum BASIC
Topic: Recursive functions in BASIC
Replies: 11
Views: 408

### Re: Recursive functions in BASIC

I don’t have much call for recursion in my job (aside from occasional data validation of complex hierarchical structured data in TSQL) so mostly the DEF FN as shown. I once had a query in a tool and it needed a recursive search to do the job, An expert said it was not possible but I solved it. Prob...
Thu Jul 18, 2024 8:50 pm
Forum: Spectrum BASIC
Topic: Recursive functions in BASIC
Replies: 11
Views: 408

### Re: Recursive functions in BASIC

I consider myself to be a reasonably competent programmer (I spend a fair amount of my professional life doing it) but reading stuff like this still blows my mind. Recursion in general or this BASIC-method with DEF FN? During my study (1987) I coded a recursive mazegenerator in Pascal and got a mes...
Thu Jul 18, 2024 5:41 pm
Forum: Spectrum BASIC
Topic: Recursive functions in BASIC
Replies: 11
Views: 408

### Re: Recursive functions in BASIC

Thu Jul 18, 2024 5:39 pm
Forum: Spectrum BASIC
Topic: Recursive functions in BASIC
Replies: 11
Views: 408

### Re: Recursive functions in BASIC

Decimal to binary

Code: Select all

``````   1 DEF FN b\$(d)=VAL\$ ((CHR\$ 19
3+"d" AND d<=1)+(("FN b\$(INT (d/
2))+"+CHR\$ 193+STR\$ ((d/2)<>INT
(d/2))) AND d>1))
``````
Thu Jul 18, 2024 5:31 pm
Forum: Spectrum BASIC
Topic: Recursive functions in BASIC
Replies: 11
Views: 408

### Re: Recursive functions in BASIC

I even had a recursive HANOI solution printed in a string.
Thu Jul 18, 2024 5:29 pm
Forum: Spectrum BASIC
Topic: Recursive functions in BASIC
Replies: 11
Views: 408

### Re: Recursive functions in BASIC

Code: Select all

``````10 Def Fn D\$(n,s\$)=val\$ (("s\$+fn D\$(n-1,s\$)" And N>0)+("""""" And N=0))
20 Print Fn D\$(10,"abc")
``````
Thu Jul 11, 2024 5:43 pm
Forum: Hardware
Topic: Correct tape recorder connection to 48k+
Replies: 5
Views: 699

### Re: Correct tape recorder connection to 48k+

No, there is no problem having EAR and MIC connected but you might need to adjust the azimuth.
Mon Jul 01, 2024 8:46 pm
Forum: Emulators
Topic: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum
Replies: 86
Views: 1350427

### Re: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum

I have an idea to improve speed of quaracterdisplay so I hope to bring out 3.01 soon.
Sun Jun 30, 2024 12:43 pm
Forum: Emulators
Topic: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum
Replies: 86
Views: 1350427

### Re: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum

Sat Jun 29, 2024 10:49 pm
Forum: Emulators
Topic: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum
Replies: 86
Views: 1350427

### Re: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum

I now have Quaracterdisplay working, but now IX-intrupt is not working....

so no new release yet