我编的程序如下turtles-own [energy]
- A% t: C- s/ \* d0 v- xto setup- _7 I7 M- w7 t5 H9 U1 s
clear-all, u9 L( \ Y5 D
setup-patches: L0 \6 k3 K- {' \# O( Y
create-turtles 1003 q5 Y D0 [8 v7 }
do-plots
5 q0 b. u9 m$ H ask turtles [ setxy random-xcor random-ycor ]' `+ L' j+ [; a" P5 G
end
* J' d, x: V7 A! Dto go
8 o) R/ Y+ v" e$ V% c+ B) c move-turtles/ B$ ^5 Z7 C; i) F6 K
eat-grass, x; e- m) W, y2 d$ U8 N
reproduce% L2 Y( L6 F/ [( a6 ], {; h6 b
check-death- }) b8 p6 e& N `4 |, Q9 m1 K
regrow-grass) c! L, `* P" ?# J: Q- q
do-plots
8 ~6 t9 ]: z1 J. a( L1 aend
& B- v% |' U* q, \* C i* @4 @* w# ?( kto move-turtles/ Q. @9 U( r! W& r
ask turtles [
1 }+ I `: n1 B8 r right random 360
3 q+ n. C' e, \% b forward 1
5 {8 Y' P) z. F. C- F9 ]% ^* { set energy energy - 1
4 |/ a, X0 x6 x! Y0 A( J& i ]
' q+ b4 ]9 v, e4 _8 y1 `+ Tend
$ Y) v% x' Z! Y/ ato setup-patches3 k$ e% ~! Y) g# |( q" N
ask patches [ set pcolor green ]
8 {( v1 D5 i5 }2 O# n; f# s. _; xend
9 z: S4 Z: q2 s D2 Fto setup-turtles8 I/ `5 g; l+ q0 P3 C: `
create-turtles 1007 q' o+ C3 M$ x) c \" J j
ask turtles [ setxy random-xcor random-ycor ]
( H9 C- \+ u P% d) f& L% Lend
& x2 u2 U: B( Tto eat-grass/ h; ~4 \) T2 c g% s7 t1 t8 J
ask turtles [
4 Y" t3 o$ Y* Z- L4 Q1 G1 A9 H9 @ if pcolor = green [
& R- C6 p+ P; V& i+ `6 I set pcolor black# V5 Y: S& g/ _
set energy (energy + 10)2 L1 h7 K' ] |
]) M, Z/ ^: f, X, K
ifelse show-energy?
1 R3 v# c, m' e: u [ set label energy ]
6 f; k8 Y- Z/ P$ {( z: |6 ^ [ set label "" ]7 ]0 z: i8 V& S5 L3 w/ p7 f+ V" o
]
0 D" q) e2 j& g- g7 Wend5 N3 K6 Q$ D) s4 Q# |, V) z) V; c
to reproduce* M5 y7 z+ |+ D- d
ask turtles [
9 |, x" l, Y9 v5 q! C+ i2 x if energy > 50 [
6 ?* t4 S4 r1 U! F5 Z* G) x6 x l set energy energy - 500 ?5 L$ H1 e/ x$ p2 t/ u
hatch 1 [ set energy 50 ]
) F* u* H/ g* y: ~ i6 F6 F) K ]
# A- f) B) I4 p ]
2 N; l+ v! Y, c7 Kend5 S0 d+ M* f, u
to check-death
$ g; e1 |: P& x- F ask turtles [
7 P- d5 I+ ]) b6 A: k& ` if energy <= 0 [ die ]
$ t0 \. Z; [/ u2 j B( F ]3 ?2 v4 r) n( {9 b
end
, p% p* s2 K8 _* vto regrow-grass9 e3 N% _2 ^' W$ k8 L n9 v
ask patches [
3 a/ }& T& p$ u7 F; X5 h if random 100 < 3 [ set pcolor green ]2 ?" {5 F5 P* n2 R# y+ A
]5 o4 ~" n+ h& a; k0 p0 Q
end
7 m0 b f- S+ T* J- sto do-plots8 j! A, x' C" N, G
set-current-plot "Totals"
; G! `: ]: c* T' O: @. ~: c set-current-plot-pen "turtles"* }7 B, n: g j& V2 K$ n" |1 [2 L6 T, D
plot count turtles
3 ?: A; K# Y3 J0 v( q7 N set-current-plot-pen "grass"& Q7 ?: z/ i0 C2 d h# W; z
plot count patches with [pcolor = green]+ N' c- r( E4 L3 k' \" H y7 n) r! f
end
+ [1 }1 G' c. V' l% y" x0 |可是运行时提示no such plot: "Totals"
1 A; g; ]" L }1 ^. d/ W/ Derror while observer running SET-CURRENT-PLOT# T9 M/ A g5 Z; |) ]
called by procedure DO-PLOTS
" N( a, ?0 b4 \# e called by procedure SETUP. [# Z u- d7 N8 M3 V
called by 按钮 'setup'* S r9 V6 `( I! d& J' j d: g
求大神解答啊 |