FXY Function

[AN7805]

Hi at all,

How to activate the FXY function on the keybord?
I don't find this function.

Thanks,

Matt

[XavSnap]

"FXY function" don't exist in the Zx81.
May be an array variable: DIM FXY(10) >>> LET A=FXY(INT(RND*10)+1)

[AN7805]

Thanks Xav.

I text "FXY" normally with the keyboard?

Thanks,

Matt

[1024MAK]

Are you trying to type in a program listing? If yes, could you please post up a copy so we can see it.

Or are you trying to write your own program? In which case, can you tell us what you are trying to do?

The ZX81 only accepts the keywords as printed on the keyboard. It will not accept keywords typed in letter by letter.

Mark

[AN7805]

Thanks, Mak.

I'm not able to plotting this program:



To the string 80 i have a syntax error.

Where is the error?

Thanks.

Matt

[XavSnap]

Mark is right, "F"+"X"+"Y"...

In a type in program, if the there is a function in a PRINT or VAL(), you had to type the keyboard quick function:

A=VAL "NOT PI" must be type "NOT"+"PI"... two tokens in basic.
In case of natural type in, value by value, the Basic will stop with the 2/x error.

In case of :
IF A$="" THEN
OR
LOAD ""
Type two cotes, the special key "" is only used in a PRINTed coted lines.

[XavSnap]

Cap0103.jpg (4.76 KiB) Viewed 2342 times

just add a comma in the PLOT command...
80 IF L(K)>=F(K) THEN PLOT K+4,10+L(K)

Code: Select all

10 DIM F(24)
20 DIM L(24)
30 FOR Y=1 TO 10
40 FOR X=1 TO 12
50 LET K=X+Y-1
60 LET A=(X-6)*(X-6)+(Y-5)*(Y-5)
65 LET FXY=15*EXP (-A/5)
70 LET L(K)=FXY+Y
80 IF L(K)>=F(K) THEN PLOT K+4,10+L(K)
90 IF L(K)>=F(K) THEN LET F(K)=L(K) 
100 NEXT X
110 NEXT Y

[PokeMon]

FXY is not a function, it is simply a numeric variable (name) in the listing. And it is not an array.

[AN7805]

Xavier now i see the error;

80 IF L(K)>=F(K) THEN PLOT K+4,10+L(K)

I don't put the comma after 10.
On the program list is an error, the comma are missing.

Thanks,

Matt

[AN7805]

Yes !!



Thanks at all m(_ _)m

Matt