我编的程序如下turtles-own [energy]* x7 R0 G6 I, q s* w$ u
to setup
. }; a0 [0 ]) @1 C7 E2 [ clear-all# T* H) E; j5 M$ u7 c: ^
setup-patches) u4 m5 v8 S7 w
create-turtles 100. y! k9 ?1 C9 n$ V1 C5 A
do-plots7 H" k0 L3 ?7 ]0 x+ _% n% ~
ask turtles [ setxy random-xcor random-ycor ]) \ y& V4 D7 f1 B" i
end8 f, J. G- m* G
to go
. Q0 X, S3 S/ \0 ]0 Q move-turtles g1 ?4 ]6 i+ {6 V/ Y& b( o
eat-grass) I( ~5 v/ o6 ~
reproduce3 ?: R9 f" n Z. X! r3 R9 R
check-death1 S& |$ D+ _& }8 \% c1 Y$ k
regrow-grass
' m. [2 M2 h9 _7 N! E0 N0 g do-plots
2 u- a$ q/ o' m# ]- c4 |end
- x, [& g# I* l: Y* t# Zto move-turtles2 `- C( \( ?6 K7 p
ask turtles [$ ^/ _% F5 N7 ~0 W. a
right random 360+ d5 n5 n' u2 Z' T- n8 J4 F
forward 1
8 H0 h2 b5 H/ \& C; m set energy energy - 15 ]- p3 y: u0 h1 j. v
]1 \. _; Y8 y& `, y
end
. W% W6 f/ i, o+ sto setup-patches% z& {4 X8 N: I
ask patches [ set pcolor green ]
) S" _1 W# w' ^% p$ Kend8 R* N2 A. c, P4 N% t" Q, Q
to setup-turtles! z: [% H3 \* {" J/ T) G
create-turtles 100
" \3 b4 E- v9 ?7 @- t4 ]+ s+ W! S ask turtles [ setxy random-xcor random-ycor ]
) V1 x' G8 [' k1 F8 f, Aend
" j5 l! D6 y0 F( l4 Fto eat-grass
% G' Q2 Z4 O$ e0 Q# c& K8 N0 @ ask turtles [* n. Z# X/ E6 K4 V. H; Q
if pcolor = green [! ]4 h+ |# ]+ Y# D7 k7 x# M! f
set pcolor black
8 e* @( _( R) a# n8 @2 m, U# P set energy (energy + 10), ?9 f5 e% a$ G
]
! Z7 v- m' `' `& j) Z# L, q ifelse show-energy?: {0 j% T* d/ a/ J
[ set label energy ]
, a* K) ]5 T& F1 Y0 } [ set label "" ]
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end) S4 o" r# P- X# ]
to reproduce
4 U- a* G; Z E, K8 \ ask turtles [
4 }) ~5 Z& \5 y/ j+ p$ W if energy > 50 [
# G$ B% b9 N: {8 m6 o$ M( E! g/ y set energy energy - 50! n2 s8 M+ j0 b
hatch 1 [ set energy 50 ]( [8 Y: j( ~0 W1 K+ s& T$ m
]
* P; F2 @1 W+ F& f ]
1 t* \7 ~' ^1 A e Vend2 _. ~( F$ X8 m) y' T; X
to check-death
, P$ o- r J* U ask turtles [% m8 |6 s2 f6 `
if energy <= 0 [ die ]' O: p2 r$ C+ |9 I$ w+ b
]
4 ^; c( x" z% n8 a! zend
, U2 k: h( |- L" A! j& F, k, _to regrow-grass$ e) T9 g1 B2 h+ R! i% n
ask patches [7 Z8 L3 \) C1 s, ~+ Q: \
if random 100 < 3 [ set pcolor green ]' @+ T3 y! J/ x5 J" c0 v$ M- e
]9 h$ o+ O+ X9 l
end
! ?* N K c1 s; vto do-plots+ V u9 b1 B8 Y: G2 _3 S
set-current-plot "Totals"
( q- P- y! E" _% ^' W# e set-current-plot-pen "turtles"
U# I- C8 i4 G+ @7 l" f8 T/ Z* p9 c plot count turtles5 N- [, o0 q8 C5 R3 x- `* {
set-current-plot-pen "grass"
$ n9 g& u4 H+ A8 d plot count patches with [pcolor = green]
, l/ a# Y* W: V2 h. rend
/ Y$ N+ Q6 z( o可是运行时提示no such plot: "Totals"
+ V; B9 [9 X! G# y! zerror while observer running SET-CURRENT-PLOT
, e- a. q- I; z* s m called by procedure DO-PLOTS/ W7 ?0 o6 U0 _5 G$ g: o/ c
called by procedure SETUP
( l- g0 j! ~8 I# C6 P called by 按钮 'setup'
3 {- e# r1 s) l' {$ H求大神解答啊 |