我编的程序如下turtles-own [energy]" U: Y, }; e. x
to setup& b! n H7 n6 S9 I
clear-all
# v# Q7 _# S \: ]/ e setup-patches
2 ` o% d3 M! k! d" m0 c- D create-turtles 100
- U. j) }& e1 ? do-plots7 S% H. }# w5 G2 C/ I
ask turtles [ setxy random-xcor random-ycor ]
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to go$ B+ l- q+ {/ S4 k9 j; ^0 t6 ~! @
move-turtles Z2 s' a2 V0 L5 w/ N2 B
eat-grass, [( w( e- ~4 N. ~& V4 G3 B5 q* W
reproduce
0 \. H6 o" b8 s! t4 @& X6 w check-death" \+ Z8 w1 j" @) W% W- F6 t
regrow-grass7 t# m5 n$ b& A; C$ T
do-plots
3 S2 G, N9 d# Y; v5 c, eend
; Z. R0 P+ K7 F2 G" y. `to move-turtles
4 J( V9 j# Z9 g( o5 m ask turtles [
: \) j( v; p9 P) H8 y7 s* b right random 360
; [9 B# t6 p( x D. T3 k forward 1# b+ o9 b3 g& C7 d2 i" Y" x( Y. L3 r
set energy energy - 1) \- d7 c3 p. C w/ f
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end
# ?& l! ~/ `9 \- gto setup-patches @5 V7 X$ U2 w% l9 I+ r! x
ask patches [ set pcolor green ]2 D0 q: y" h4 `1 x; r$ B
end
a5 n8 J% p% k# u! wto setup-turtles
" x! S7 C2 }; ~: ` create-turtles 1003 r7 e( N7 q( F
ask turtles [ setxy random-xcor random-ycor ]$ R' n: f- x: ^8 R" x
end9 \/ Y' a( s) D3 U& _9 j: w" E
to eat-grass
6 s$ j, {0 @& _) V ask turtles [$ y" E# a! E& s; Z2 p3 n
if pcolor = green [0 N/ G" e& D6 C6 y4 T" E; Z
set pcolor black
( o A. R1 c0 Z set energy (energy + 10)2 K& R8 R8 j! ?! W
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ifelse show-energy?3 _+ M/ ^4 F" p4 G$ l
[ set label energy ]. X1 |/ b6 N; j8 ?+ i }
[ set label "" ]5 k2 g* L. O# |& N2 a% {
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end8 a B8 _! ]6 H
to reproduce+ p" e: m' I/ y' e% w6 F- ~
ask turtles [
* I2 J2 ?9 x' L* n; e0 j9 y if energy > 50 [$ M0 [( k0 c# e6 i% E
set energy energy - 502 v% S) O9 t3 H
hatch 1 [ set energy 50 ]
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]
; x9 T0 r; `1 k; g5 i4 ?7 F. J8 Cend
* d' D n4 n3 z, |to check-death
5 [0 U: F& X" v. Q8 S9 Z# B ask turtles [
- I- m! m9 E2 R) l( Z s3 F7 ] if energy <= 0 [ die ]
a' V2 J5 c$ J ]
4 O/ a8 Q9 s! h4 V- T, Q+ send" a: Q& d0 F3 U2 [) d; b2 w" T
to regrow-grass
% L; R9 V3 J3 }. D! N& ^ ask patches [! z* m r1 |; I
if random 100 < 3 [ set pcolor green ]
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end9 v# ~* y- {0 L7 w. N, ~1 }
to do-plots6 \8 {) U7 H* b* [* Z1 v
set-current-plot "Totals"
( d9 F$ w# U3 E! A set-current-plot-pen "turtles"
1 W( @* H4 G+ f plot count turtles
, \$ o8 @2 ^% o( n3 j set-current-plot-pen "grass"
* t! g9 s5 f3 a4 F& Y- B! D plot count patches with [pcolor = green]
* v7 f( e) R. k# L) ?% G; rend8 c0 Q+ } e: q
可是运行时提示no such plot: "Totals"
7 t" I( `: a( C2 [2 a9 gerror while observer running SET-CURRENT-PLOT
; J, D& K% y: p8 i called by procedure DO-PLOTS
$ p; Y5 k3 }2 j5 Y" j called by procedure SETUP9 m- K/ u! L9 y. `' _) e. P
called by 按钮 'setup' z! R* [7 c+ `2 x
求大神解答啊 |