我编的程序如下turtles-own [energy]% f" N4 i; m: ?2 v
to setup
. N o2 p7 s! ?. U, j4 ^ clear-all& q3 B& R- z* S1 N" i& g
setup-patches! Z9 h- U, [9 I F6 A. ]8 x
create-turtles 100
& s7 Z7 }3 i( Y! V& |- E! { do-plots
# u' i: k/ S* D ask turtles [ setxy random-xcor random-ycor ]3 S2 @; r U3 M8 W9 F8 o
end( x0 V& {: Z; z, G
to go
7 c, e9 C& m$ G- F; Q, W) Q move-turtles1 i4 J9 x. `9 n& C9 d; M
eat-grass1 s& I8 N/ z- C8 W
reproduce- `% b) a* T! \$ ]* R# ~( K/ I# ?7 s1 f
check-death
8 D0 G/ }. H) ^0 S$ G- u regrow-grass
+ [" H* u) @9 m do-plots
% S% x7 {' Y( {# aend" h& j# {. [0 {2 t$ H
to move-turtles
7 H0 k/ E1 d7 o/ E' d1 Y ask turtles [8 t: ~9 n4 h. _$ D
right random 360
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set energy energy - 1- Y! w. H' O: c; g- W3 s0 ]
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end
6 ]! w4 h! D( e1 Y6 ?6 }to setup-patches
5 a5 t" i8 B$ R ask patches [ set pcolor green ]
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to setup-turtles
; h1 g) [" V( t( V; {) F* a" w" A create-turtles 100
; s- p% X" {5 S& O, Q; g ask turtles [ setxy random-xcor random-ycor ]5 n. T, }5 E% S4 m% |- Z* n
end( f1 |$ K: x A Q8 `' Q- M
to eat-grass
5 ~7 p' h ]& J! d ask turtles [
3 l6 H# S0 o; ?8 j' l( [2 B if pcolor = green [
& R- K1 ~% ^/ a- D- e# g set pcolor black1 j% ?' h6 `3 P* N5 C
set energy (energy + 10)
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ifelse show-energy?6 `# J$ L1 g. s* A0 @% b
[ set label energy ]1 X4 I; E8 I ?
[ set label "" ]) T5 l A1 Q' `0 K
]3 P% c* [ G/ X/ T3 Z& y+ X
end
' T0 C: a! u/ R4 h$ U# lto reproduce
- D' N2 C; X6 |. T' C ask turtles [/ l5 Z/ E+ g T) s% b
if energy > 50 [
0 R. w9 P( B4 N; p# i set energy energy - 50
+ d1 }: Z# V4 ]; Y% `0 z hatch 1 [ set energy 50 ]
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end; C p+ @+ F+ r M& C, \) F
to check-death
# h8 @. K* M) P3 z ask turtles [+ N# B$ V$ P! r# O
if energy <= 0 [ die ]0 `7 I/ F8 E% ]" k9 V, {) l
]
: P$ k* L1 G- Z( [end
* H) u) M$ \/ y' {% P9 Yto regrow-grass. J8 |" D3 h% t
ask patches [3 O& K! v2 w: G2 W% ^* l3 \1 E1 a, ?
if random 100 < 3 [ set pcolor green ]" d- L- l( \9 \! a" i1 S- [
]
$ E9 V: Z4 I* T' h1 a0 B1 mend
9 W: A' ] h6 ^! t1 mto do-plots
0 R. f+ ], ^% h' Y set-current-plot "Totals"
, j+ m* I7 Z6 R set-current-plot-pen "turtles"
" C: L: o1 v5 j4 {+ V8 D$ S plot count turtles
' J- a! g' F4 k% f set-current-plot-pen "grass"7 e1 f4 g S% {% c6 v+ k9 e6 `
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"# ?4 Y9 k9 B0 ~1 U3 k2 Z
error while observer running SET-CURRENT-PLOT
- k1 R/ W$ \! _ called by procedure DO-PLOTS7 a# W0 z7 ?$ [0 E1 B6 x! U( S
called by procedure SETUP
0 r+ P4 q7 k: }% s+ L called by 按钮 'setup'
2 n$ Z' B! z5 x8 ?2 g4 o( v求大神解答啊 |