我编的程序如下turtles-own [energy]
! v# G( J K4 _+ wto setup
0 n" L# o% d6 o- e$ H h clear-all
* |3 ]$ s G* s$ s' n setup-patches% Y; ~! X. D0 j- }, Z
create-turtles 100
2 x6 S1 z% [+ a1 I do-plots5 m" e* W1 y( F1 g2 R- G" H$ M& A. _
ask turtles [ setxy random-xcor random-ycor ]' {/ y6 F! p; Q
end+ C3 W& U; f/ y" Y- g
to go
6 s& J- P0 [8 U* U% b( {1 }1 K8 Z move-turtles
d- ]. E* C* b3 v: L! h: u* _ eat-grass# P$ k- H2 M1 N' P) X/ L: V: s
reproduce
- z" X3 U9 p# U8 W0 M check-death
7 n+ q( v! h7 d+ u, n/ x regrow-grass
- q; F9 q1 X' d1 w do-plots
+ z4 U+ X& @- O0 z& p3 Oend
: h* Q" V \; u2 q X3 Cto move-turtles
1 v; N( C2 T( S' l( P3 ^5 _/ h% u ask turtles [0 e/ T. t( N7 n5 Q, j& S
right random 3609 N" j$ k8 }/ k. E
forward 1# o% }% z, @! c
set energy energy - 1
, \4 {: G) G9 F* N% `- o ]
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to setup-patches9 f& v+ s! C: N2 ?- v) B- @
ask patches [ set pcolor green ]# I* X* p" j: p2 i. a
end
$ s5 r% j U9 H& Wto setup-turtles; c6 f% t- f+ V" x3 ]) Z- Q3 n3 p3 }
create-turtles 100% `, s6 w0 T, }, \ N
ask turtles [ setxy random-xcor random-ycor ]
1 |5 c- t1 E% D D' |# Fend
: D$ x2 c9 a: w; B. F9 `to eat-grass
" w8 F- r+ m. \, M, P5 a8 T% l ask turtles [" F+ ^; K# U4 D+ g+ v
if pcolor = green [* p3 d3 g; }. C7 R7 K; z) q
set pcolor black' T, [/ ^* q Q) M3 L" h
set energy (energy + 10)3 B y7 f0 O U% U' Y
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ifelse show-energy?
/ D( o _. q# c: {* C [ set label energy ]& s1 X/ h& G( H: G4 L
[ set label "" ]% b- m# W0 T- J. D1 h
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end
+ `% y- m8 ]6 S& s6 fto reproduce
5 e$ l$ V/ c7 o1 A7 m ask turtles [; Y4 p' W) Q/ v4 ~$ L \% ^
if energy > 50 [1 c1 {, F8 p) [
set energy energy - 50
/ C' `( W+ J- W* W; h4 |% w hatch 1 [ set energy 50 ]
! l" ? G4 x$ ] ]
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, }, j: P2 L5 o" ?' y f$ v$ nend
3 B8 G7 P; W: g: H }3 uto check-death7 ^6 P" Z9 r0 i/ G
ask turtles [
& a9 }( ~' h% z% m+ l0 ^2 d) V& r if energy <= 0 [ die ]
8 _/ [& n' Q8 L$ r ]
9 `: z$ G. i2 s# cend+ F9 j/ ?. R: D( z: l5 i
to regrow-grass
, K" Z+ u, Y A/ e ask patches [- q5 N5 w. K1 F$ ~5 L% a5 A' z4 f
if random 100 < 3 [ set pcolor green ]: R4 f6 S/ k9 W# z4 y" L$ t9 \
]
' q% _1 A+ _& Y6 b6 `& Dend
# z5 Q- F% F- j" A7 f! oto do-plots
4 e/ @3 N) d; v- ~: a; Z8 O set-current-plot "Totals" B: I h) c( t4 E1 e* t6 \, S
set-current-plot-pen "turtles"
9 w/ k% r; ~. v plot count turtles# ~4 f# Q/ V* E+ p- k% U. G. N# j
set-current-plot-pen "grass"
) d3 o; P" L$ ` plot count patches with [pcolor = green]0 V+ i! o' r7 h5 F
end5 H5 ]2 n( Z' q- W' {3 |: l* A
可是运行时提示no such plot: "Totals": w0 z4 ~: U, \% ^# e9 ^
error while observer running SET-CURRENT-PLOT% {5 [8 R; Q" w$ D- B5 d
called by procedure DO-PLOTS; f* H8 i/ r9 T8 F1 m( K+ |
called by procedure SETUP3 H! y8 E3 q" V0 ^ X, g) \
called by 按钮 'setup'
; y% w. f1 _ J8 x求大神解答啊 |