我编的程序如下turtles-own [energy], P. }+ q& S; {8 i% P
to setup4 O3 E5 g* H# H! A
clear-all
' Q! h3 H% g1 i1 s setup-patches4 U% F4 m0 x/ w
create-turtles 100- c8 z( h! G$ j$ C& B- v5 F: o
do-plots
6 [1 O$ ^4 f; y Y" u+ _$ L! {* b ask turtles [ setxy random-xcor random-ycor ]
3 D0 a7 \, V+ b Z$ Q3 eend0 I7 O5 k0 `# p, f% n' O* @
to go
# g$ Y& W+ x7 ]! r4 N3 Q, H1 m move-turtles
8 E" u- e% M: {9 F# l eat-grass4 K/ [/ F0 a' O* W1 W$ I
reproduce4 a4 ~& i6 J5 o1 l8 g2 h
check-death
2 D; N/ f2 d4 F" B% a3 t7 X regrow-grass
9 b2 h2 S( C Z, r( j do-plots
3 M8 j3 O. K" p& X' [8 qend
" ?, _# p0 x& g- bto move-turtles
3 r( O5 R# m; n( V9 f ask turtles [2 ^0 E# [: g ]
right random 360. b8 h7 i) J* ^- C2 t
forward 1
' Y( Z: \: v) g( G- c6 b set energy energy - 1* F& X, \' |7 {! i! @: h+ ~% I
]
4 P- P& p! h! c7 v& B; y: X# Lend# c" E, A0 s" k5 s, o
to setup-patches B8 U4 o0 o: F
ask patches [ set pcolor green ]0 n! [7 o# V: \ H" B/ s9 r1 I
end8 |7 ?" V2 K' g( w% ~- K
to setup-turtles
* m' [' Q# h B# ^ create-turtles 100
$ ~% N! _- ^6 J( o h ask turtles [ setxy random-xcor random-ycor ]
0 G" @: |8 p5 O q# k# m Uend
M+ U. w8 p6 h% {5 A4 pto eat-grass
8 B- Z# M) W; O. @$ ~: p ask turtles [
# r& h7 H1 S( w3 h ]6 y$ k if pcolor = green [
/ @4 @6 t5 T1 S, s set pcolor black
! u) v0 J0 F" X0 D! z set energy (energy + 10)% D) V: q- g4 U# r
]
f7 g2 T% e. B; ]5 k ifelse show-energy?" G9 M- d |" D0 e( S& A
[ set label energy ]
: x; Z0 n- C7 T/ |# U& n8 \5 {3 \ [ set label "" ]6 E6 m; i- D! `, m
]8 E; [2 K( h `9 |$ {4 y
end5 |$ v2 j q' s' s$ |2 F6 ~
to reproduce& v2 S. v5 O0 S) w7 E
ask turtles [
. \5 P3 x! }/ ^: l- [* S/ v if energy > 50 [
( y7 n8 m, d- P set energy energy - 50
- Z) W- b r) w; l7 `: d& T5 ?/ s hatch 1 [ set energy 50 ]* z/ [6 @& o6 D
]) w% ^4 {/ ?2 T- `+ W( S$ h/ G
]
Y- O3 E# c! Jend- C/ e8 Z- p$ N+ D- O
to check-death
+ o% d1 p# n$ ^. C6 g' o# W7 b2 ? ask turtles [8 g/ g$ B3 X" |% ~1 \
if energy <= 0 [ die ]8 r& v l8 U0 E1 K6 C
]% m3 f; f" W/ V9 t9 B
end
+ o* W Q9 N* z* u8 ~/ F3 f; pto regrow-grass$ V# u5 N& |. g" {' r5 Z
ask patches [
3 `- {) F$ h9 o! f+ P9 ~ if random 100 < 3 [ set pcolor green ]
4 N+ x% }# z) c4 s4 _6 c. w; v& m ]
" J( d3 \; k. _4 v3 S& B# q xend, c# p1 J9 k4 A- C/ n6 J+ h
to do-plots
# K' [% l: R' K; C( s i; v set-current-plot "Totals"* T# {; v5 W e, x
set-current-plot-pen "turtles"- E" g8 K6 R3 f" q
plot count turtles; H. \* d9 H$ D) L! [3 ^
set-current-plot-pen "grass"
) J ~. ]* j v0 @4 H plot count patches with [pcolor = green]
- e& q0 m1 E }" ^end
' t1 M: M. ~! w. j# I2 B可是运行时提示no such plot: "Totals"
4 d: z& U# \( j$ z E6 Uerror while observer running SET-CURRENT-PLOT. @; k {& P: D% q P8 W5 x
called by procedure DO-PLOTS
8 d: x4 t" J J' P% j/ y$ H. ` called by procedure SETUP
% g2 z2 m5 J1 X: e# ]. A$ g! C called by 按钮 'setup'
; `' s5 P0 x* K2 U( P+ p" K: p* I求大神解答啊 |