我编的程序如下turtles-own [energy], R3 y7 r0 f6 j
to setup
( n6 K9 ?; q h' L7 |# j clear-all
" h: p: j5 a$ O6 n* \ setup-patches4 P3 S, c5 R$ t, p
create-turtles 100
: k7 `# f) B0 ?8 \ do-plots
( C2 d6 w/ ]2 g& w. q ask turtles [ setxy random-xcor random-ycor ]8 I$ ] _% Y3 \$ b) |
end8 K/ S; |+ e4 V/ Z
to go
' \8 ~9 R( h" ?& \( R' t move-turtles
6 \5 }7 C+ h* Y4 g$ }! W( w5 C eat-grass
; u( `* O# T8 B6 t# l' X& ~ ` reproduce
1 a- g; V6 S- T% o' F check-death
3 c% H% e; C4 L" a( o* K, ] regrow-grass$ u" `" [: h+ D- K. l) b3 x4 T' ~
do-plots1 t% b6 v. e+ Y+ U0 Y% r1 `+ @
end4 X1 W6 t( O0 D+ B
to move-turtles
; ^9 t9 w( Z: U7 [5 N1 ` ask turtles [
* q9 ?2 c4 R5 H, g right random 360
, l* o0 c3 X2 l$ J forward 1
9 b7 J o3 V4 G% ]6 V. } set energy energy - 16 P/ s$ d5 G: s5 R! g. M! c
]
# {& ~- E/ E- f/ P# V) hend# z' S* N3 t! N/ F0 [6 n3 R
to setup-patches9 S% R; o8 q3 x3 s9 ?- y
ask patches [ set pcolor green ]
- t2 B: u5 J* g3 d; A5 Hend
. W& z" L' v; ~/ Q8 l, m% Jto setup-turtles
9 ~ I; E3 C s+ @0 n. Q create-turtles 100. x' h6 S4 X" v8 C2 w9 e
ask turtles [ setxy random-xcor random-ycor ]& c" a4 P4 S7 l; R3 l
end! P6 f5 h1 ]( K& E. E
to eat-grass
: x& j6 V% D4 D; p8 ? ask turtles [" H5 C: k/ p) G1 O
if pcolor = green [
% x: A, ?6 {( T$ A set pcolor black9 W5 Z- J) K4 i" T/ M* R7 K
set energy (energy + 10)! Z# c" m+ f/ e2 n/ P5 u
]$ T( i$ ~" P$ c2 b# G9 V* U, z
ifelse show-energy?. P4 G9 h9 |. I
[ set label energy ]
5 l' \+ l" ]4 m" S! x5 F( E$ u8 g [ set label "" ]
. m, i" O3 w) j' O ]
3 u* i2 i5 v* k2 m4 }4 J& Oend
8 Z( q- D: }9 Mto reproduce" W' ~9 G; @; v& a
ask turtles [, @9 _5 ]9 m( V! ?" C6 V D# w
if energy > 50 [ ]2 M+ k3 X) i- B- ]" k
set energy energy - 50
e7 q# M' a. F$ }3 T hatch 1 [ set energy 50 ]; r$ r5 u1 Q, C" ^5 R
]5 Y$ l4 k7 p3 D5 \
]
- \+ U5 R( I6 w2 t2 r" Lend
; p" N$ [5 Z, }1 E4 w% Sto check-death
. h3 s+ p! F8 s# t- I* g ask turtles [: W5 f, M# K7 \- J( K' P) s' g# S8 G
if energy <= 0 [ die ]+ [; v2 l" B5 n j8 M" t
]
8 o c5 e. G$ L V4 R- b; z7 ?, qend
) i5 N5 S; h5 Eto regrow-grass
2 p% s U0 p1 T+ w5 h4 v7 R ask patches [
9 q2 k+ N0 p* {9 r if random 100 < 3 [ set pcolor green ]
/ o9 @9 S0 d) o: f" y, Y% z ]: s$ ], n* x% K" w( ]' m8 R, i
end; s! v& h) c0 g g
to do-plots9 n7 u+ e' L- `
set-current-plot "Totals"
5 m; N9 z# c/ D7 L& _* n z8 H set-current-plot-pen "turtles"
- K2 P" {( t. v3 G, s y) u9 s plot count turtles
/ p- Z' x- {' {( } set-current-plot-pen "grass"
* E+ @7 Z* ?- e plot count patches with [pcolor = green]
0 N7 x& Z- y& ]+ _/ t/ W' Vend
0 j/ N y3 y- q+ ~: D可是运行时提示no such plot: "Totals"
! ?. \ B, H7 ]! @) V0 merror while observer running SET-CURRENT-PLOT8 P8 Z: I4 S" [
called by procedure DO-PLOTS8 p7 @, _; @ I4 J6 t7 N9 W
called by procedure SETUP3 j0 Q0 Q5 q e+ c& r
called by 按钮 'setup'" u" g: D' Z7 l
求大神解答啊 |