我编的程序如下turtles-own [energy]
; v; E, _- A7 g! B2 Y# dto setup
( Q* D3 ~" q" }6 ~# k( q clear-all
6 C" @' w" ]2 E: N2 Z setup-patches" y2 _; h+ o" T3 I6 [
create-turtles 1006 X* C+ ^! F* e: P! S5 u
do-plots
9 u+ S- K" k. f `* P% w ask turtles [ setxy random-xcor random-ycor ]
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- a+ G7 k& `( u( V- R# V& |to go
]* b. X+ O( ?5 a move-turtles5 m3 H4 [0 n s7 \: _
eat-grass4 D7 I6 k- z$ L1 Y' ?* S
reproduce1 @1 K2 K- X( X/ V) z$ e+ j" B
check-death" O( k% `3 ^, ]- U: t
regrow-grass6 Y! l- B" L2 [3 u9 o# R# ]
do-plots/ Q1 _8 h" w) ?" d# [
end; q& D7 `5 ~2 _9 x' {
to move-turtles- @ H4 w. z0 L- m8 k! z6 I
ask turtles [5 N2 ]3 b( x4 s* u6 n3 y
right random 360/ {4 H' T; x- ^
forward 1
! e" U: s( I( R- ]5 q: j set energy energy - 1
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end
. I# d) |. v# ?) @to setup-patches) P0 P0 L# ~0 S A$ [
ask patches [ set pcolor green ]
3 d$ h6 P; A: R) E- \end
" }" i# j4 N; }# Y' ?2 Nto setup-turtles8 p/ q7 e2 R9 M0 J5 j- y
create-turtles 100; ^3 o$ C$ A4 k) B: q$ h# [
ask turtles [ setxy random-xcor random-ycor ]
/ W( U5 v; l+ `/ p4 Cend
m& ~6 U0 V" [& `- z% Hto eat-grass
' R+ o5 C1 W* o4 ]" x Z4 W+ g ask turtles [7 w1 C9 F' }* j
if pcolor = green [ t' |( Y- X# E, w3 H! z+ V5 }" _
set pcolor black
, I/ M( A* u, b- Y set energy (energy + 10)
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ifelse show-energy?; W1 I4 w V8 n( R7 q: T2 a5 w5 \3 m
[ set label energy ]' r' m) q2 ^6 z
[ set label "" ]
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end
' L0 M7 R& ]9 a) P# k5 kto reproduce
$ h% v, J* ]% U) O7 L! ~ ask turtles [7 @1 h. ]/ Y. N/ i) {2 ^; G5 h- ?
if energy > 50 [1 A$ h, H# `1 i! Q
set energy energy - 50 g- d; G% }) y3 ~5 Y+ O6 c
hatch 1 [ set energy 50 ], S1 f( Q+ u1 z: \" i$ p' N. V$ Q
]% z% Y" Z. j- n$ Y
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end
$ n% |; i( }3 H" I) nto check-death
7 w5 X0 T4 M9 l ask turtles [7 o6 z5 J3 ?' v% E; N7 U. L# G
if energy <= 0 [ die ]
' X0 y5 p* ^* {9 o ]
9 _7 X/ w" D2 n9 K) u% }/ Vend
" p9 T! C/ z* p( _3 u) W2 ~to regrow-grass
; p u0 L2 {% R, k, F D$ W ask patches [
9 i' [' O- V1 q9 d if random 100 < 3 [ set pcolor green ]3 H( U& K* E5 E
]0 N, ~% G) m/ Z* U
end
7 l# `" y$ H4 {/ @% yto do-plots
7 z* Y" w: Q: o% g5 P; U' M* F set-current-plot "Totals"( c, z* \7 C$ r; e6 K! M8 @- e
set-current-plot-pen "turtles") ~% B+ l. \, O
plot count turtles0 l* f6 }& s5 T3 V1 Z
set-current-plot-pen "grass"
$ _; N+ L" K; L; y2 R plot count patches with [pcolor = green]
& g! ]+ P% \9 ^3 Oend G4 R4 g, D' \. Y% a
可是运行时提示no such plot: "Totals"; l( o5 R* s0 F2 {1 r8 w2 }. x
error while observer running SET-CURRENT-PLOT. o& d8 p" k3 g: a8 i1 V( g
called by procedure DO-PLOTS% K0 a! o+ J6 D" b9 b5 R2 S' c3 p
called by procedure SETUP
* Y* R3 ^5 h& b1 i! n called by 按钮 'setup'5 T; e" l3 \4 b
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
