我编的程序如下turtles-own [energy]
: O, w8 U1 A8 v8 R" S: |7 \3 Xto setup" c+ N+ ~4 ^, M! _; F9 J
clear-all
! c) F/ K3 ^- V setup-patches
( ~0 |& f# h- }9 d create-turtles 1002 a, d; d) x9 P+ }5 o/ `4 ]
do-plots
5 z" ^3 g7 ?" _% ~! G+ M ask turtles [ setxy random-xcor random-ycor ]
, @: ^$ r# p2 u: ]1 Yend
' g% t# E$ o9 Y$ z1 V3 J& Tto go! m# R4 y' a( _; |$ z
move-turtles! V' F* b, x0 {/ N# d4 N
eat-grass
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check-death" L: Q+ C( {& g! Y
regrow-grass% L1 S, ?" c; s6 j( W4 w) X/ V
do-plots
9 y; y* [4 V) L5 ^end
: Z$ J# b8 x( `; w' Gto move-turtles
! D% H+ w7 C* q. ^ ask turtles [0 k" W9 F b# ~1 x8 I+ r5 `
right random 360
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: V- w2 |0 z7 | z7 @9 P- T" w) d) u A set energy energy - 1) p4 h A6 k: n# B# E! I X
]
# w1 S( r2 ]+ V4 ?end
1 C$ e( g3 ]( \/ Ito setup-patches
7 D6 I- z, x3 `$ t' ^! b ask patches [ set pcolor green ]7 p9 h C3 h7 J
end6 a! I- u" e) j' V. P4 w7 n' V
to setup-turtles7 b" k4 X D4 ~; j6 `
create-turtles 1009 p: w2 C- b$ }: b; b
ask turtles [ setxy random-xcor random-ycor ]: L9 \* [+ c2 ?$ v9 a- y0 z2 f N
end
8 L1 p% Q) _8 R$ u. yto eat-grass
- H5 d; _. p, F% m ask turtles [
7 N! W* }8 d3 O: d if pcolor = green [
2 k3 t/ c4 K/ e0 \# w* | set pcolor black4 c" o6 j" d# @4 J$ z7 [: b
set energy (energy + 10)
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' p) t4 M2 |) y& }+ F ifelse show-energy?! d' w$ _$ v9 _. b! F. }
[ set label energy ]" U: n Q9 ^8 u( z. B2 B
[ set label "" ]
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end1 ]9 w9 {3 S g$ n0 ^; t' L
to reproduce7 {0 W, E2 F" j z
ask turtles [, p' i% K6 p. l6 @* ^5 R7 k, W( t H! ~
if energy > 50 [
& f: u2 P( G: h' }% a+ b1 R set energy energy - 50
" U% |9 e1 p+ O6 R; C hatch 1 [ set energy 50 ]
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]
6 J! \, {" X1 X% t) e% a* send
8 w4 ?% y, L$ U5 K! w4 qto check-death5 p& ?8 O" M9 i5 c- q1 k
ask turtles [7 f/ O# a. U; C# k3 e
if energy <= 0 [ die ]
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end/ c: U1 E' R$ {* j+ o9 V0 x# X
to regrow-grass8 q2 c. s. |9 p- D0 o( y
ask patches [
8 K3 b+ o7 ^9 Q9 Z& b3 i if random 100 < 3 [ set pcolor green ]- }% Q* _, A) x8 i* ]/ R
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end
: u/ P2 r& k0 a: U3 Qto do-plots
5 u2 ~8 Z/ l: a set-current-plot "Totals"
4 y O/ c8 e: Z set-current-plot-pen "turtles"
# [/ I/ z& ?3 \* _; T2 S" r plot count turtles
5 ^; d" |$ C' a1 r; J" B; y1 J set-current-plot-pen "grass"
/ Y# @+ }* E0 Q/ C plot count patches with [pcolor = green]* I1 u, G! ?0 u0 ]' ?; g3 X
end
! X- ?/ l& O! m$ ^& F' i可是运行时提示no such plot: "Totals"
3 W( P0 Y8 Q3 q5 Ferror while observer running SET-CURRENT-PLOT
, z/ b- I) a2 P" L, Y2 `* d. _1 `% ~ called by procedure DO-PLOTS
' ?% ^1 v1 e5 g3 c called by procedure SETUP
( M' S2 C; P+ s8 \# @9 F; _/ F called by 按钮 'setup'
# X5 h) C6 @3 \6 }% m1 r求大神解答啊 |