我编的程序如下turtles-own [energy]! C3 c/ i/ a- Z3 ~5 X7 o
to setup
; u0 _4 Z& b3 Q. \% v clear-all
% l3 [$ g b, b* L I" w' R* l setup-patches0 Y8 w0 u2 v( ?
create-turtles 100
7 P$ s1 U0 o+ v6 o! G+ N do-plots
`- z! q9 T7 o, v ask turtles [ setxy random-xcor random-ycor ]1 U7 L. ~3 | a4 F) ]
end
9 g+ F& P1 L! Q6 i* [- V! S) g1 Lto go+ O" g9 N2 r) o# w) Z# O$ y
move-turtles7 ^: [# m0 f9 A! }7 \( o j _1 E
eat-grass* V( C2 m% j: `0 |2 j
reproduce5 P. {2 p* g$ ?" ?. E5 y
check-death
7 R2 R. Z0 {3 H- L+ p) f7 O0 T regrow-grass
2 C M a, P$ \5 c- n, _. H do-plots
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to move-turtles
4 o# w' {8 g6 e0 E- V: Q, O( l ask turtles [
( B2 e" b. I! _3 {6 P8 I right random 360* N" Z% G# o7 C" P9 n' c
forward 1
3 E! c* I3 u# H. i set energy energy - 1
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( s' [ q) a. d( ]6 o) A2 L- }end* k F! X! b- h( ?
to setup-patches
0 U, r7 G9 ^) s/ J( W; m ask patches [ set pcolor green ]
1 {' t) }# B/ n, d3 @" Oend5 Q4 Y- M8 y: F& N
to setup-turtles
& x$ ~5 A2 E' P5 L( j* R$ E! S create-turtles 100
, L4 q7 s9 d# | ask turtles [ setxy random-xcor random-ycor ]9 J8 K+ m7 x- B! Z$ h
end
$ f, p _4 [3 o7 j0 U3 Pto eat-grass% ~, a7 ]/ v% A
ask turtles [
2 f; A* x9 X: |# \6 K if pcolor = green [* i0 h# P S' t. n3 r
set pcolor black( K$ W8 W8 a: E6 { p4 `, z1 g+ o
set energy (energy + 10)
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" J' U" s- U( z, Y ifelse show-energy?1 p. V( B" ~) e' N$ Y3 r0 S6 I4 V+ R
[ set label energy ]
# \" p. ^0 S$ f) A" G5 Z* C3 Y [ set label "" ]
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end
2 Y0 X+ x/ m/ ^$ `. @: X: F7 Zto reproduce7 ~! `* T/ H+ H9 ~- {: v$ m
ask turtles [
' O P6 q! m- F6 e/ y# o& \, X if energy > 50 [
) I9 o# H6 {1 e set energy energy - 50
& Y, |( Y8 B. T: v ^ o+ V4 h hatch 1 [ set energy 50 ]: N1 U4 U9 x' s/ ?, q6 J
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]
I+ Y$ N1 s r$ D ]3 |5 c" D% lend7 k" Z& _: t9 v- R6 V5 x: {2 s6 o
to check-death
7 {' ]6 q% c- x" } ask turtles [
0 ?; M- v5 s- E5 y' N if energy <= 0 [ die ]
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8 q) O# C- L& Y/ H: E n7 C1 B$ k. qend
- e5 o. q* E7 V( [5 q7 oto regrow-grass
2 ?" x$ ]+ y) X6 R) Z% p6 T% Z' _3 z ask patches [
/ h# M; I3 F# F3 @( d' v if random 100 < 3 [ set pcolor green ]
{$ ^- ?" q* e5 Y: P ]+ G1 X. P2 H# c2 U/ C! c
end! ?7 x0 \2 r8 j( a
to do-plots. ]4 W( d- e- P1 p4 m" `) I* S
set-current-plot "Totals"
) B% s% l6 q8 p4 B3 ? set-current-plot-pen "turtles"
2 ]7 q7 A0 {. z8 M% H plot count turtles) E# f1 E' @+ E* U' z$ h" [; F
set-current-plot-pen "grass"+ q& O6 v: W1 _) c8 Y. |
plot count patches with [pcolor = green]
) Z. z m6 J5 ~- d+ F$ nend
* u/ a& s& _3 h/ `& n# k9 L0 D可是运行时提示no such plot: "Totals"
; \5 t# W! A9 n3 eerror while observer running SET-CURRENT-PLOT- H4 ?6 I, T9 W8 A. C' x, i( Y. n
called by procedure DO-PLOTS
& V: C8 e g! z& o, \; O called by procedure SETUP3 z F- y2 o+ m8 ~
called by 按钮 'setup'* X0 o0 _- B2 B2 m- f, S. i. R
求大神解答啊 |