我编的程序如下turtles-own [energy]6 f7 o8 j7 G4 T! E- J
to setup
0 L3 Z1 W$ W8 x# K1 j1 @9 u clear-all& ]0 J- `$ F* {/ u! @+ _
setup-patches
6 Z! j$ v, A# t" l. b create-turtles 100+ Z$ G3 {# \6 I3 v. G
do-plots
% g" p! a" w) v, N9 f% M! }, ] ask turtles [ setxy random-xcor random-ycor ]2 t) ^( k9 u Y i0 G
end4 C) K0 T7 p. @
to go$ P( C! x" v' g9 C% [( e8 d# h
move-turtles
6 w1 X7 P m. ^! j. m- ` eat-grass
9 I4 s9 b% n' R1 X& T0 i reproduce
`8 S2 s3 M% a B U* I( m check-death
2 L6 [% w. ]4 f regrow-grass
! U0 W5 A; P% \6 }1 _1 c do-plots
5 M- m, T$ V; H7 W2 vend: u3 R5 r+ L. A) {4 f
to move-turtles
) c; T% i( e$ }* h: M ask turtles [ T/ [4 @( ~6 }
right random 3604 U& B/ s4 M4 d+ m9 J/ x
forward 10 W# L8 p. m6 V3 u; C6 }
set energy energy - 1
8 d: D% w3 U; l% j9 Y ]% o6 x1 H: N' U
end
: y& A9 U4 }6 p. w; zto setup-patches6 E8 v" F+ O& z+ U* x/ o5 [" S I
ask patches [ set pcolor green ]
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to setup-turtles
& `* b) H6 L3 u+ f create-turtles 100; w$ t+ z* N1 ?7 z! [
ask turtles [ setxy random-xcor random-ycor ]
% J: U6 t# J- z* i: W, J& ]end! x! l4 Z- `2 X( B
to eat-grass) g8 p& n% j; K- N7 i/ @$ e2 K
ask turtles [9 A8 K) Z6 b& Q6 a
if pcolor = green [
. J0 Z* N! E+ n set pcolor black
0 `& Y% G. d$ _ set energy (energy + 10)
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ifelse show-energy?5 w4 ~2 H( A% H$ X$ L: I
[ set label energy ]
2 `& a# ~3 _3 M( m& [* d" a2 `" c, ? [ set label "" ]
3 o$ p' @; b+ h3 J& {1 _ x ]2 X h" S2 o% [4 E5 p' r) }
end7 l) F0 a( V9 }5 d; R
to reproduce
7 a* n7 i: O# o ask turtles [( u! w& z, S* k: H9 t
if energy > 50 [
3 C5 _5 ^& [7 {4 P/ m set energy energy - 50" Q; G% k; U% K4 f
hatch 1 [ set energy 50 ]+ P. Z+ G% H" u
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end
8 a- G* d, ]9 cto check-death
' k5 I0 C/ P, |% ` ask turtles [5 b0 _" [* c. {$ K0 U7 F5 Z
if energy <= 0 [ die ] r1 I! r6 D. b. d7 G3 A
]4 Y% x1 C% y1 e: z' m3 |/ R
end
8 [0 U4 J, _( I3 b# j; Rto regrow-grass
( A2 H b+ u& z! b ask patches [/ H: Q1 R' l' r3 t2 [
if random 100 < 3 [ set pcolor green ]
4 K: y# G* L. |4 i: ] ]# J' K2 j7 h& G3 b8 L* w3 V4 F
end
5 p2 G* F3 _0 E: H/ r9 f/ C: T$ ?to do-plots
g. |" {$ _% X6 s6 G set-current-plot "Totals", }1 E' M, v& t2 l0 ^- G7 `' v8 l$ c
set-current-plot-pen "turtles"
# ], t: G: H/ p! A+ Q5 a plot count turtles( L$ Q2 Z7 |9 h2 }1 b! E# k
set-current-plot-pen "grass"
. M- J. X; C* j, c4 r plot count patches with [pcolor = green]
3 J1 G D' }9 Bend
7 K# b% Q3 F' E% f+ p* p可是运行时提示no such plot: "Totals"7 ]' B6 s) |8 |, u1 [& f
error while observer running SET-CURRENT-PLOT# E# T7 `9 X+ ~% g. L
called by procedure DO-PLOTS
9 d* l N- B# t8 @# K! x; G called by procedure SETUP
9 Q5 j. T+ |% g) i; r called by 按钮 'setup'. }: s o1 s/ O/ d
求大神解答啊 |