我编的程序如下turtles-own [energy]
9 U0 I- w+ {* [to setup
4 L( J& e, O% X, a* f4 Q6 A clear-all
: f6 X* {8 N9 i1 U setup-patches; D% T9 i9 E- N5 e- d. Z
create-turtles 100
; j& @& _$ U! J0 I: t do-plots
& B8 t5 i8 C; X$ r- Y! f ask turtles [ setxy random-xcor random-ycor ] T/ G3 k; O) q4 ~% Y# b
end
5 t! D$ a- U# N2 i. b1 rto go
1 i/ l* f& W5 C: Z3 e& S move-turtles
/ D3 ~/ s/ [$ F/ m: q/ q- ? eat-grass7 n6 e" R6 L" G1 A
reproduce
7 I$ g7 h6 s1 s( a3 B8 A check-death
! ]2 G7 w+ k8 A6 X regrow-grass/ g( C, ^* _' p- y
do-plots4 i% h9 x! C0 D% p* Z5 V
end* a2 U7 ~4 r! u& J* B. D9 b' A6 Z
to move-turtles3 Y: c/ M& o% w7 G% a- k
ask turtles [8 J, U0 \4 }# m. U
right random 360; b7 {1 t1 s. f% a" ^
forward 1- n' B/ Y2 A# Z# J, w5 c9 }) |
set energy energy - 1
( ]& \2 C7 W) l( ?' n2 n1 g ]5 h% O( \% f7 S" X9 {: f2 k
end6 j# {! {6 e5 m+ {5 l' R
to setup-patches
3 [* W3 V( K2 H% C' ^ ask patches [ set pcolor green ]
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to setup-turtles
+ Y5 O! f+ h2 H! P- L" S* B3 } create-turtles 100
4 `. x) x! ]. M0 { u& O0 K ask turtles [ setxy random-xcor random-ycor ] U- k# z: V. |% d6 L6 q" ~+ ]
end
; |+ X& w( ?' Fto eat-grass
' b4 j9 J" T% q {7 z ask turtles [
/ ]/ h& y* V, Z6 d+ ~ if pcolor = green [$ y$ ?2 a* ?+ [
set pcolor black# `/ u. f9 D J R6 E& a
set energy (energy + 10)
) }" t! P3 Q6 p6 i: w! F7 W ]
' Q1 Q& O: x7 u% X ifelse show-energy?9 s c: B3 P% E1 C/ B3 q$ m
[ set label energy ]
h8 F; x! {" N# Y% k4 g [ set label "" ]6 T. Q6 ` G. C8 c& F$ j
]- u3 p6 I2 @% q
end
" U8 b2 A1 c# j# y2 Z# y6 F' fto reproduce8 Z) U4 ^: V1 |$ y I0 P( W5 ]
ask turtles [) R' f$ d. k9 e
if energy > 50 [
! b2 E3 [' P7 f+ O3 z, J set energy energy - 50% g8 j, N" J8 m# b
hatch 1 [ set energy 50 ]
# r4 E" o. V9 q. z ], X6 o& z& `5 i" g
]
' i' b+ K7 R: H3 a' M" ~9 vend
% s# [ ^- c( z+ r0 @9 G7 C$ L# Fto check-death
1 c' r" a7 `% C) N, b ask turtles [
- Q. I4 r2 v0 y4 O if energy <= 0 [ die ]
0 {2 w8 A4 A0 M* w9 V7 w/ m/ v ]
# n5 I3 x7 \' B2 nend
! R9 r0 C- r( Xto regrow-grass
O, c1 D% Q' f5 u" t, R8 v$ A ask patches [' P) Z; w% {1 p( v% v% |: \! f
if random 100 < 3 [ set pcolor green ]
. {- e/ L' d1 A2 n# ] ] W" q) r# L# h7 j' s: N5 }
end" c4 q3 {, f* {3 a# T: c6 O4 p8 P
to do-plots
0 ?. j7 p2 T) A( C2 }6 L7 L+ F7 X set-current-plot "Totals"' t( l+ v0 q4 T& \& f
set-current-plot-pen "turtles"
4 m% w# d1 Y/ I plot count turtles3 [ `0 X9 W. [$ x3 W2 a& p
set-current-plot-pen "grass"
( C8 I/ d! I, @( w plot count patches with [pcolor = green]
" L) U/ q+ E6 s+ b2 b$ ?end
_9 j- ~6 ]& H: w& q可是运行时提示no such plot: "Totals"4 l" a8 r% k! w. h, g2 Q
error while observer running SET-CURRENT-PLOT* A* T6 x( [8 C( E8 W, e$ j- X- \
called by procedure DO-PLOTS# U) V: `7 c4 V6 K, C
called by procedure SETUP
9 A; m z/ Z" Y1 h$ J called by 按钮 'setup' o3 q0 k, S' K8 N5 E+ N" K2 v
求大神解答啊 |