我编的程序如下turtles-own [energy]5 L1 X2 v& c9 c! G7 a
to setup) R# a2 O$ y( u. q k. o! D
clear-all$ Z+ s* M3 \% c' r8 x, |- C4 K
setup-patches, E7 Z9 m1 N1 G0 A
create-turtles 100
6 P0 H/ H4 G: g8 ~ do-plots
) x4 Z; e: o: C& _ ask turtles [ setxy random-xcor random-ycor ]
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to go: R" ^3 k* o# }. U4 q
move-turtles
' ]) l" }& t+ |) @* a N eat-grass
2 z9 f) L: Z; w: i0 e reproduce
' c. e7 m, k3 G" h M check-death
* |7 `) y+ Y/ P8 D6 N# D regrow-grass
+ z6 `5 |8 `! ~/ ?! b do-plots" P) v' J* l! Z4 V# Q ]. g; t
end
* T. v/ x2 [$ B/ g" {$ |$ d/ mto move-turtles
% z8 K9 ]$ ^6 u! F1 y ask turtles [$ p7 N, y& x4 B4 `
right random 360/ y" J! m# E' t% w/ G' Q; L
forward 1
, F) j( D/ `* \) w set energy energy - 1
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end
3 ?8 s7 F5 c |to setup-patches
9 p8 g$ x/ N8 i D) n: O0 V1 J ask patches [ set pcolor green ]: H, ^* s* c, j& A8 Z5 _6 S# ]
end# o* H8 N, G$ `. x, `* U Q; {
to setup-turtles
6 ]! u3 J, h5 L' ? create-turtles 100! l8 n" g A3 J1 E& `) D( D
ask turtles [ setxy random-xcor random-ycor ]
$ F* i) t& P( ^6 r9 L- ]3 z; d6 _! Gend, n. Z5 K3 w$ d" N9 X1 N5 H
to eat-grass9 Q+ G1 R) Q6 d* p# r
ask turtles [$ O8 d+ Y9 c. P& j
if pcolor = green [
0 h3 a; y' z, f& h5 P' f set pcolor black
8 n1 w0 r1 q& M i# W set energy (energy + 10)
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ifelse show-energy?5 O# h3 d3 h7 y# }
[ set label energy ]" T/ s1 a' j6 z6 E& w3 j
[ set label "" ]
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4 j; z1 G9 [/ rend
) Q# l1 w7 J% D0 ~1 Wto reproduce
8 w& R& I. i% r+ M9 F# P ask turtles [
( G1 U+ D& Q* Y+ y if energy > 50 [
* Z* O Q4 E) [+ z; q set energy energy - 50* |) U: Y# a; M+ ] ]$ j
hatch 1 [ set energy 50 ]' E7 ~5 D) Y$ _9 s" j
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end) A+ C% |1 R$ {* A0 p0 }
to check-death; l5 B5 t* `* `) |6 ?3 r, w
ask turtles [/ k* R; z) Y p& x9 s
if energy <= 0 [ die ]+ a0 q: o! V% X" F) [% ^3 [( @
]
% a! E0 A9 s- |1 oend
8 k! W Y5 a( r5 e. A3 Y4 l" }to regrow-grass
" F' U1 b# f, \1 o# p" u ask patches [
9 W; h% I5 ^/ J8 n [ if random 100 < 3 [ set pcolor green ]
3 d: M# Q4 ^0 x+ K: t ]7 y9 ?0 j$ U' {" P
end; V: ?( |! P4 u, j7 _, @ O( J6 b C
to do-plots
& @; k4 N2 \% Y0 C set-current-plot "Totals"1 u" {1 N1 |# q8 \; i0 w% i# Q3 G
set-current-plot-pen "turtles"6 ~& R$ l8 m( w* `! |0 X
plot count turtles6 o8 b: Z! w' S, ]
set-current-plot-pen "grass"
2 Z) P z0 t: u7 } plot count patches with [pcolor = green]! L3 f6 C- R# p- ^8 q( {% P$ W$ v) i
end
# A( v( f) S, [可是运行时提示no such plot: "Totals"
$ b) `: A1 s& d) J$ lerror while observer running SET-CURRENT-PLOT
' v9 ?# f3 j7 ] called by procedure DO-PLOTS
( K; D( [; A* t v' L called by procedure SETUP
& O, Q- v" M+ _. y3 G6 }5 F called by 按钮 'setup'4 d" _( M2 a- v, C7 ?# {
求大神解答啊 |