我编的程序如下turtles-own [energy]
; ^2 ]- ^5 `5 w( i; u# j' f Dto setup" N; x8 a- O1 g6 T: r
clear-all
( @6 c4 R r4 J2 J& V' F setup-patches
, x: j# P4 W! G5 }/ t4 \ create-turtles 100
3 L: ?- j% E# M7 F: t | do-plots* V5 e* A' x/ l! @
ask turtles [ setxy random-xcor random-ycor ]% L/ U& E$ q. E8 {. K; U, u Y# H/ F
end, L& m4 Q+ ]" ]) D, g
to go( J O- Z! e3 I6 M
move-turtles
# H/ [; W' H- n$ n eat-grass
# m( h8 L5 W2 m: x reproduce
0 m. Z2 N8 n7 a, g3 X: X, S check-death& w7 S; q. O' {( P1 V6 ~
regrow-grass
: \- D4 d6 K z" F do-plots
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to move-turtles
; `% }2 S/ A. G" \1 {0 U! K; ^ ask turtles [
P; w1 I8 q X+ L7 p4 y# y& Z! p right random 360. R% S7 M8 @) G7 t+ G3 h
forward 1
! l. ?# c& k5 _' \5 H& L% b set energy energy - 1
1 }5 B C* |- B2 S3 X0 v/ K ]( D$ W1 x0 x# V; S; t* I+ C' K r+ L
end
: ?8 f$ k/ _! O: yto setup-patches' [; P: L8 n; J' `
ask patches [ set pcolor green ]
7 ^) S5 R9 n% x! R; F& {end
; c1 Q, L/ x4 Fto setup-turtles
4 ~& ?. e; [8 g, i create-turtles 100
0 X- H$ q' B- N* H" V ask turtles [ setxy random-xcor random-ycor ]) ^9 i7 z- i9 i5 ^5 ]
end$ {$ ?8 l( J! ~- l5 s, T* K
to eat-grass
8 j* T. F; {9 ]( x9 r7 W& N- H- l. w ask turtles [
: r3 _! F) }, u if pcolor = green [9 l0 V- b+ C7 E! d; D( S: x3 U
set pcolor black' |- L5 o, F+ o2 c
set energy (energy + 10)
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/ P5 W' h+ _0 N$ B6 p& Q; j ifelse show-energy?8 H! E/ f: c- @- u4 h; d
[ set label energy ]. y. Q% m! }" I1 {, V9 L
[ set label "" ]
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- f4 C0 o$ j( O5 W/ ]. v* T% E$ Hend
, l& W7 S$ E9 K& M6 g! [to reproduce
3 r, Q: P% ~. {4 [! M" k, d ask turtles [
4 E2 o1 I6 {1 s9 v3 I! Z& w if energy > 50 [" d8 v! A: G# y; O' g$ Y8 @1 j
set energy energy - 507 f. R, _' y' W8 x8 x8 K/ |4 @$ d
hatch 1 [ set energy 50 ]
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2 s) F/ S# ^: X5 r ]$ J3 v/ m" `0 \, U
end
1 m+ R6 M$ M9 k9 h/ Pto check-death
8 L9 d4 R1 n; u" J9 ] p ask turtles [
- K$ D$ L8 y( J3 H) Z% z$ ? if energy <= 0 [ die ]
; E0 O3 Y& I9 n: F ]
# L5 p, x) g) k4 N( U( |8 lend9 k; w. s' u+ ?7 _) x; O
to regrow-grass
3 L* n3 e- R9 j; y2 I5 l8 v ask patches [
) `# k! t. p! n: O; t if random 100 < 3 [ set pcolor green ]
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end
3 \# r: D! d& g0 ?3 e. [to do-plots2 i" N& z; Q7 Q# D
set-current-plot "Totals"
- O5 D" z) j8 o: l2 G set-current-plot-pen "turtles"" ^' K4 M* L$ X7 I- {1 n2 {
plot count turtles' ? S1 F$ C3 } x* S
set-current-plot-pen "grass"5 {/ d {1 k6 t6 n' l7 e% }6 G
plot count patches with [pcolor = green]
7 P" @; s6 I e7 e& X. k: J: d" ]end
4 ?( S6 n7 o# R, h1 I可是运行时提示no such plot: "Totals"
: L$ v* C/ l* ]" jerror while observer running SET-CURRENT-PLOT4 X' }5 k( c7 ]2 o
called by procedure DO-PLOTS$ Q$ Q- ^9 E) K( O0 T
called by procedure SETUP
7 p- A- ]7 \# A m" h8 P3 i# w3 S( m called by 按钮 'setup' ]5 O9 ]( w% c/ M; V& _/ b
求大神解答啊 |