我编的程序如下turtles-own [energy]" Z( C/ e2 ]+ c7 D/ L Y; F
to setup. R. t/ b+ ~ m% V6 E
clear-all1 e1 p+ h. A/ N6 H
setup-patches0 w; @- J0 K; G
create-turtles 100* F Y9 |. q: a; A' ~3 b" H
do-plots" D0 C. Q+ l% e- v) b# f
ask turtles [ setxy random-xcor random-ycor ]
# ], E# k# Y! X# H5 I" {end, _% x9 j+ C# `# l7 p5 a8 g
to go
) W l2 n8 i1 w$ ~8 f move-turtles
. ~ ?3 |5 k8 {+ Y \9 P# U; Z eat-grass
0 D% `9 n7 o4 A& I reproduce/ m+ A5 V6 I8 Y5 n7 j! y
check-death/ k' W5 Z* |: w. K
regrow-grass6 P9 m+ E$ T7 f' G1 o/ E+ B
do-plots( w" A L$ v3 R4 W
end
, A% c* l% B' c3 h: y7 |! ^to move-turtles
4 x& ]' R- Q0 z+ s, a ask turtles [
5 i! ?5 C% a) k u right random 360' Q% z2 f1 S. j x
forward 1
5 k0 [6 t3 r) o0 I0 c set energy energy - 1
) f/ g6 U8 u, w5 | ]4 a% p/ P. a! ^
end, [5 H4 ~, ^& o8 P0 @$ o
to setup-patches9 f0 y$ T8 L% Z5 h: F j: P. a6 R
ask patches [ set pcolor green ]0 l `* {* m( z* X' _& h, n
end( u. L3 h2 z8 B, `- Y; |& A) o
to setup-turtles5 b- I1 L. A) ~& I0 ?9 S3 u
create-turtles 100) A0 L4 w8 R7 E. M# q# F
ask turtles [ setxy random-xcor random-ycor ]
0 l: ]# O8 m3 Q7 {" f/ dend
" ~- O2 ~: I3 r6 g" k1 o) I; ?to eat-grass
* p3 a+ {8 @8 K ask turtles [
5 |" I. O% A( J& V* g if pcolor = green [5 t1 X0 y: Q6 `. y0 i
set pcolor black
+ T+ Z1 |( q: d$ c3 @ set energy (energy + 10)
' n; u8 z, F6 J, y, m, I ]
& o8 A6 K9 f# h ifelse show-energy?/ h+ r6 ~1 s! D) r
[ set label energy ]
3 w6 |% X, R! ~4 ?! H [ set label "" ]
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! K9 C1 l6 D. Aend) }7 X% n. F3 E1 R& y3 ~
to reproduce" F' \& F! z1 A& Y1 i
ask turtles [
: X& O! ]7 [. L+ U# y if energy > 50 [
; B& Y4 E% l. b q' Q H set energy energy - 50# w6 r' j" O+ z2 @, V: I* j Z4 H
hatch 1 [ set energy 50 ]; P) h* D8 q* J$ I9 {5 [1 ]- h
]
9 F) W1 B% r5 b# Y4 D: x1 ^ ]
j4 e P2 v) K! w2 _end8 P- n! W( g1 o9 L5 T& N# {# Y
to check-death
+ d( M! A8 i* a+ i ask turtles [- ~, u- p2 F/ M2 f* x
if energy <= 0 [ die ]9 N( |; } C1 S* }$ u; S
]; l$ G$ V! p/ b. N5 X" {: v
end
2 r% J0 y; ] R+ kto regrow-grass
! u' [8 Q6 i: R5 g' N+ F ask patches [
. b: c% _7 |& `. ^8 |% [ if random 100 < 3 [ set pcolor green ]
% B# M! M& X( ?6 p5 r4 C* n) h ]
$ y4 @/ d% m) S% {. x. `( N8 C( mend5 Y, b+ p. Z1 Q: [" H8 u( E& ^8 A+ T
to do-plots
% D; U6 b4 }' y6 t, r/ A; s set-current-plot "Totals"
) O* A ]3 C+ h: H; }9 B* M/ V; X set-current-plot-pen "turtles"0 ]# U( [( C8 @9 H L
plot count turtles
: d0 M+ m2 S1 ~* I- W' k set-current-plot-pen "grass"
/ r( T" N7 S) Z$ z! i: i& C plot count patches with [pcolor = green]* ~/ ]# r5 g+ F
end
% w! ^) E. C8 f- `6 W可是运行时提示no such plot: "Totals"- P3 i0 w" o5 P2 i* u. |
error while observer running SET-CURRENT-PLOT
0 d: C. V9 f* _ c/ u called by procedure DO-PLOTS# I: h8 L& d2 H) o- e0 J, a
called by procedure SETUP) j0 H% ~* X2 [
called by 按钮 'setup'5 T# i3 _6 f6 y6 e0 l" {
求大神解答啊 |