我编的程序如下turtles-own [energy]
5 y4 i$ Q. p1 v0 u; d) q/ {to setup i, l& n0 H Z# r% s% R# X/ ?" Z
clear-all
# |0 Q: E. p- ^# @ setup-patches
! l3 N! a6 ^/ v/ {4 U create-turtles 100( |& T3 b( G# g
do-plots
^" @) I. q$ P. j ask turtles [ setxy random-xcor random-ycor ]% V* ^6 q6 I5 r4 Q/ I6 y
end! a3 a# A* n% C! O( k w0 S( W* a
to go
) e \* U; |6 [ move-turtles9 n- y& O; `! d& [5 {( c' A4 w3 w
eat-grass
& v( D! I/ E8 P) c. b o: `2 s reproduce" Q+ d- ?/ S0 G
check-death
+ R5 {* B+ O8 b* `; i regrow-grass
' F! D+ l9 K7 H* v6 K* U0 L do-plots
( F" ~( l8 B" l3 kend; a! b V6 |( W
to move-turtles' i# G7 |& v' r
ask turtles [4 u& f- u. D& s% [4 E
right random 360! f4 k A' S5 |6 @, k9 C
forward 1' N6 G1 b4 [% E( ~
set energy energy - 1" _# J; s4 `; p/ p% B: d; i
]
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to setup-patches
" i2 h1 v9 e( G" Z0 U ask patches [ set pcolor green ]0 T3 f' S) A: R6 t& ]( W" z. W
end& v0 A) I2 x R1 R8 Y
to setup-turtles$ j6 B* K7 X% {! \4 ? t: _
create-turtles 100
/ O( M P% S# l9 _" E ask turtles [ setxy random-xcor random-ycor ]8 U5 E) i$ l. t. j7 h9 ^
end. m7 s1 ~: h# _9 T# a- w
to eat-grass; t6 L+ p; ?) g/ G- i4 ~2 e
ask turtles [
5 X6 l! U6 U L+ L9 P& }7 a9 J if pcolor = green [
1 z. M' F* ?% K' f7 O3 U1 y- { set pcolor black, `: E* V( n3 y1 W( s6 e4 K8 F
set energy (energy + 10)
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# q2 T- f; J, j) D; O ifelse show-energy?
, Q x1 C/ [2 m# D$ ^ [ set label energy ]3 q/ e0 e+ Y$ S3 F8 L
[ set label "" ]/ K1 d5 \* q+ k, S4 v
]* ~6 U; b' ]+ V' m& T
end
) q; x: Q1 Q" Sto reproduce
" f8 [# p( P- L* N ask turtles [
2 D @. P$ ?) s2 f if energy > 50 [8 _+ b$ a9 I0 V: d) a
set energy energy - 50
, A! w" Q# O# Y( {) X- c$ f hatch 1 [ set energy 50 ]1 S6 _ V* N5 H9 \. ]" d6 x. S
]
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end9 O4 V& H9 p5 R* j# I( g8 a
to check-death8 L. k, C# J# v% @' p0 i
ask turtles [: R% z% U5 c5 L7 L
if energy <= 0 [ die ]
7 C) o. C' v9 R ]
! I; [9 E( h" ?" E9 u* kend. U8 Y6 n0 p& @3 e$ a/ I! X, b% J
to regrow-grass
' i7 ^7 x7 F5 [( Q ask patches [
- `: c& a$ ~; n. @- x: B if random 100 < 3 [ set pcolor green ]
L4 ?+ c4 f3 H' O6 F$ s# X ]9 k, [3 l: s2 i. Q0 o' Q
end, `1 V; y5 o# c3 M1 x1 B; o' y4 h" V
to do-plots8 E: \: J% y! C) e& h
set-current-plot "Totals"
+ g5 _, Z* N X! a& I# l- N! j* U set-current-plot-pen "turtles"! @/ \ H. _$ o! l, H
plot count turtles: o0 H* _$ k `1 k! w
set-current-plot-pen "grass"3 D- C( w& x6 i: {5 x) o
plot count patches with [pcolor = green]( J) h, x. E4 o& f* R, W4 K2 w
end
[& r5 F& |/ e1 I可是运行时提示no such plot: "Totals"
k" }! T% g! F8 n5 ]' k) X2 Rerror while observer running SET-CURRENT-PLOT
* I; S* l( p5 a( f2 U/ ` called by procedure DO-PLOTS
: {, B9 X+ p6 G+ ^ called by procedure SETUP
; q2 _6 T8 R! W; u called by 按钮 'setup'# J2 j) ~) H0 W3 j# M6 u
求大神解答啊 |