我编的程序如下turtles-own [energy]: P3 g# n, l0 c# ~1 t7 W4 b: z
to setup
; D; T, B& A, N! G5 \3 i clear-all
1 I5 r( t: P% j! S. B4 u0 U G+ Q* Y6 L setup-patches4 f0 _" |% H" f# x6 f5 T
create-turtles 100& P9 x4 c0 C: t0 A0 [
do-plots% }1 l* ]! k4 x! c+ z5 ^
ask turtles [ setxy random-xcor random-ycor ]$ S+ A0 N% W. } E
end
' v0 u* r, k- o+ ito go$ K7 @* C- _ q/ @2 }
move-turtles
, [+ y4 K6 C* `6 { eat-grass
8 u+ }" p0 k% B2 ]' G* `9 x! z1 t reproduce( a a$ O8 G7 K* L" k% Q5 x3 j z5 b) Q
check-death; U4 H4 ~! R V K* b
regrow-grass7 v9 ~8 S& Y7 _1 u! J: { `
do-plots
& y( z& w% z* J i5 [end
, r) N. N1 J- _% K# k* nto move-turtles9 T9 ~* t( [1 O. B5 z* V" j( j7 ]
ask turtles [
! U9 c! V) V& n* D+ m right random 360
8 ^0 W8 ^+ s" J8 o forward 1
3 Z1 n5 E& v; ?5 \" m: ] \ set energy energy - 13 g/ r- I7 m* d k
]; O! j' m7 S Y# l" x! h0 C
end, K: |% x. K) ?& Z* {+ g/ ?' M
to setup-patches
- g$ j, O: K: l3 b2 J2 H6 x ask patches [ set pcolor green ]" h% t) I( `( X7 L* }
end
' `: G% f8 [: q& s! _# Gto setup-turtles4 @+ i# U. n3 `
create-turtles 1006 H; `) N5 v! G. f6 }
ask turtles [ setxy random-xcor random-ycor ]9 M2 T# [+ a4 D2 K; u1 D- u% \4 p: D( o# I
end
/ J( V. H$ o3 r6 O; s Yto eat-grass" @ e# M: @9 i4 A7 Q
ask turtles [% @' W, P( ?# e |
if pcolor = green [
& A! V8 b. f% J3 Q* S set pcolor black
i+ C& @5 h- N% d% f+ o% I set energy (energy + 10)
% |$ U9 o! m. R0 {* }9 A2 B6 o ]3 {/ P5 s& _* |' c
ifelse show-energy?% ~, L/ X- d0 P8 r2 r1 ]8 {9 J
[ set label energy ]! Q5 r& ^% ]! j& c4 q& S( B7 T
[ set label "" ]
9 }, ]# x i# w- ?* @ ` ]
5 f1 L3 D! N& l( w* `end
+ F& C S; D3 C+ ` T8 q4 T xto reproduce, h% Z- {# c+ [5 c. m, N# c
ask turtles [/ |- n {% T2 z7 V+ w: H% n
if energy > 50 [
4 ^+ K3 y. N) g# J set energy energy - 50
; l4 B: x( n% F8 w, F hatch 1 [ set energy 50 ]3 r2 E V* C: J) p3 I5 S
]
+ }2 \- t4 z5 P, _ ]
9 |* _8 ?$ C! _( Z$ ~4 ` cend9 D7 q. B$ B; D; o8 |1 v$ J
to check-death
' K8 H1 W5 t5 `3 ]+ Q" \4 } ask turtles [0 w, _& G- H5 h! N6 B7 M
if energy <= 0 [ die ]
+ H9 j: z6 g. @2 x ]
, \3 l! a" |7 q4 B. ?7 ]% y* b0 Hend
! u u+ N9 \3 r, f. d$ S5 |6 \& Kto regrow-grass
' P1 N( ~# O! W0 T ask patches [ u) M$ q, {) L- b
if random 100 < 3 [ set pcolor green ]
+ l# S2 t) x, A' J* v- P ]
c8 h( ]! G( |; Z: qend% P. J: [0 X0 y+ f1 c% S J3 S$ r$ S" y0 }
to do-plots; n3 g0 `4 l3 Z' i/ _2 H# {
set-current-plot "Totals"
3 z6 l; ^) S* G5 m* j0 r! U# p set-current-plot-pen "turtles"( O, F: K! Z+ d
plot count turtles
+ D& R% H2 J8 C/ V set-current-plot-pen "grass"+ h4 s2 V9 P# P; P! m F
plot count patches with [pcolor = green]
) M( n& C+ ]- yend
) A3 s0 f0 f3 g可是运行时提示no such plot: "Totals"
& s* t; T: L& V% G. Terror while observer running SET-CURRENT-PLOT
. L( J l* W+ C+ s9 a+ y called by procedure DO-PLOTS1 z# D% f* e. W2 @2 u N
called by procedure SETUP
' a+ F0 a. T2 t1 ?4 q called by 按钮 'setup'5 H2 P! U* K5 C: n+ R% x
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
