我编的程序如下turtles-own [energy]
) y6 m6 E# |$ L2 mto setup: k4 p9 ]; \; _: ]4 o; W
clear-all
8 ? b+ r) i% f6 Y) W& x setup-patches
2 ]- k5 `: E& r- j( W1 S create-turtles 100+ R% c# x: `" N1 h: l s
do-plots5 y$ U; p' j4 l' V
ask turtles [ setxy random-xcor random-ycor ]* p% v) `( X" l2 e: |0 A
end
3 q" h) ]6 ?) [6 h5 j+ uto go
& ?1 v& B+ F# B1 l/ Y/ Q3 S move-turtles
7 O1 z9 O1 X" L3 [( h7 P* x" d* a eat-grass5 _) j- e) P9 y2 }
reproduce; O% |# u' z( f8 [+ V3 J
check-death
: Y! p9 s6 W3 c7 y' O; g$ M regrow-grass& Y- z" g* u9 m
do-plots8 r% i& t2 [+ h% o: f3 I
end- q' d( x4 q) `0 `& I0 S4 e! y
to move-turtles: r' y% k) }: _# \) j! @8 G. \8 E
ask turtles [: b- I( k; ]. P( t9 J4 {
right random 360
N% F7 B5 r; \: X8 H+ s' m forward 1
7 v2 [' ]* J. I' D( J; I, v set energy energy - 1
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T6 P% E% V+ x9 o& Bend$ V1 |# {6 t7 K s* T1 W4 C
to setup-patches# T- P) k; B. z! B. G. e, F
ask patches [ set pcolor green ]
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to setup-turtles; Q, d; y8 }1 R7 F1 m- `
create-turtles 100; z& s# F8 r$ P9 Z7 i7 U% ?
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass
& s0 m! Y1 J& s/ ` ask turtles [
, ~8 k4 F# h% r1 Z6 o0 o if pcolor = green [
! o/ [( O/ P' p) L set pcolor black
4 N! f2 e' X+ Q/ P! p2 { set energy (energy + 10)9 _. J+ y" u7 t7 E% ~8 w
]
' P' W P2 A+ e1 b- x ifelse show-energy?
6 ]3 f2 Y2 M4 N [ set label energy ]
: `( O3 V3 ^3 o# C0 w& N [ set label "" ]
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end+ ?2 U% f( Z3 N6 e
to reproduce
; `; W# v$ u: I6 Y: k ask turtles [
4 B. J7 F' e. S$ C0 G3 F+ Y, b4 } if energy > 50 [) k O& @% L' J- R" d
set energy energy - 506 k% h# o% C% ~9 u( B
hatch 1 [ set energy 50 ]9 K) i# R& c* d! K1 Z
]
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+ r( b6 r- L+ s1 w+ Gend+ T9 Y1 X% L' F$ j
to check-death
' [8 r7 C4 g$ w* @5 `$ v( h9 h% { Q% B0 u ask turtles [
: a' H# D; t/ n6 j* E% ~2 R2 a if energy <= 0 [ die ]
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end7 k# w+ i( E0 {1 t) f: j4 ]
to regrow-grass
8 {1 T2 y) |5 r3 O ask patches [
* g# T3 l% e( [- h if random 100 < 3 [ set pcolor green ]
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4 n3 a, t! H9 J0 S! Bend" Z+ Q e& {/ l4 `. U
to do-plots& f/ a1 y- Z+ ?# [3 ^) b
set-current-plot "Totals"
; F: ~8 Y' O: t8 o. L' Q/ I( V set-current-plot-pen "turtles"
, y/ r- |* s) j9 ^6 n$ B plot count turtles# _# s6 {- p! g
set-current-plot-pen "grass"
- z! }% {2 f. K plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"" C, Z) H1 y, N9 R
error while observer running SET-CURRENT-PLOT
' A. w; {6 A' [ called by procedure DO-PLOTS$ T) d+ a% n" \4 R
called by procedure SETUP
2 m/ q- `; }7 R# ^ called by 按钮 'setup'
# L8 O; {, x; e+ J2 D求大神解答啊 |