我编的程序如下turtles-own [energy]) h' W. L( S. D+ S! B
to setup4 E l `' \7 d- Y9 z
clear-all/ }6 t0 [; f) ?7 T, J* v. ~% ~
setup-patches
( @8 G6 {: `' q$ { create-turtles 100* H6 b M& ^6 T5 d& p, Q J
do-plots9 C# y1 l1 l4 w7 N+ t
ask turtles [ setxy random-xcor random-ycor ]/ d: v) }4 [; e; `
end. |; ~2 x& T9 L; q: R0 U6 X4 E
to go
! [1 E9 @ ?! a" Q4 h3 u/ o move-turtles1 g! p# c" U6 w( K
eat-grass0 k% ~0 _2 w% M7 [
reproduce
6 u" c& |6 ^8 K) e9 G check-death/ Z5 K2 v% V) |4 K5 }% C9 n
regrow-grass
+ J3 z* i4 O& \; J( s" t, ` do-plots# A3 ]3 I( k& _: U
end! {4 _8 F: C9 G0 H7 H8 L
to move-turtles
3 h/ B& m+ ]* T: y- e ask turtles [
8 J2 P5 {8 O/ _' _2 ?# @ right random 360% |+ E: u* S2 l. ^' V+ e! q5 I3 f
forward 11 s# D4 Q2 s& {5 p1 i9 y- X6 j' @
set energy energy - 10 h7 S1 s) m8 W& y
]9 R5 Z/ G/ ?6 W* k% {2 \8 n/ j0 I" o6 y
end4 d a G7 R* L r* i- T
to setup-patches
2 g3 W$ J4 ?% X, D2 S ask patches [ set pcolor green ]0 x6 x' [1 k+ B+ i6 v6 }
end4 B" _% j# S6 p' W' ]7 E, s8 Y! d
to setup-turtles( {4 O2 [! y! D5 O2 J* K" Z" R
create-turtles 100
1 p5 o6 K) `4 N5 }$ u+ Q: O, R ask turtles [ setxy random-xcor random-ycor ]
, U/ n" r- H* z: S5 b- d- w+ iend
: o# [0 \) L0 Jto eat-grass
9 r) E2 }5 i; j! R ask turtles [
+ v9 N$ A7 l; E' \. {( E( {0 h if pcolor = green [( \8 ^: K' w+ Q8 p+ `* ^
set pcolor black
7 v& p: @, L+ C y7 q8 i. P$ ]8 @1 m* R set energy (energy + 10)
7 _& H9 a2 @$ U% m8 \/ z* b ]) t+ `$ s, a( T: D% H O% t
ifelse show-energy?
* W# `4 h u! f! K4 n7 \& n [ set label energy ]2 z) t3 r1 C/ n% S6 v
[ set label "" ]
0 ^+ A% Z: ]! r- F/ L. |$ D5 [ ]# h4 y! u; q' i3 @, g3 ^5 |
end
7 Y3 n3 G h r3 q3 I1 Fto reproduce% F" ?/ {- R% ^/ X' G& s' E1 i
ask turtles [+ k1 s# m* U6 U9 U
if energy > 50 [+ }( M5 e! w4 C7 U* @3 U
set energy energy - 50! c4 i4 n/ E; T' ?: `; L& Q
hatch 1 [ set energy 50 ]5 e* h9 R2 V1 c+ w' Q1 z
]
% n6 e5 a# Z" H7 q. k ]1 i8 U, R7 ]5 b: V; g" v
end
# T8 b8 u/ h# |2 C" [1 H; _to check-death
+ ?" F' a3 g( ~, L! ` J ask turtles [# {3 c/ Z5 {' I. M* u& y
if energy <= 0 [ die ]( I5 ~; _ E E E& |
]
% R* W5 W5 ~7 k8 Rend) s0 |5 O3 p u3 `% C6 M
to regrow-grass& Y. T8 d4 D( B; j" T
ask patches [
2 a% p+ T5 D, I! G, ]& F if random 100 < 3 [ set pcolor green ]9 i+ [1 o4 H/ c- [0 ?
]2 B0 _" W- ~3 [" T/ x; @ N, E
end5 c( y3 w, {6 E3 F" m0 R4 i
to do-plots0 P( ?1 q+ E# U4 x/ A
set-current-plot "Totals"( d8 ]. L( [4 H
set-current-plot-pen "turtles"
. k# e# | d' w9 \+ U* _) m6 I plot count turtles
& B9 Q; Q o }/ I set-current-plot-pen "grass"
' V# r- }1 f6 p2 w plot count patches with [pcolor = green]
" d4 l' D; k/ m- @: G; Iend
& w/ G9 ^$ s9 @- f6 T可是运行时提示no such plot: "Totals"; z8 U! p2 K# s% I( H% ^- F; J
error while observer running SET-CURRENT-PLOT
7 b5 x% I7 p- F3 r4 w3 c% K called by procedure DO-PLOTS
- c( v W7 B3 G called by procedure SETUP
2 t# P0 J; s: B& M6 K, r called by 按钮 'setup'
" a# Q0 U: U6 T) ]求大神解答啊 |