我编的程序如下turtles-own [energy]
6 m% h4 F% L* u$ L3 B8 s4 }to setup+ R1 b5 u z8 ~3 X# Z
clear-all
: L/ z& q+ H5 ^; J C Z setup-patches
0 {; U' Q5 F: h P0 f create-turtles 100) W" X9 M( I% s; O' Y, O* ~$ d2 @2 I5 m( A
do-plots- g G( a) B; k( e" G) z
ask turtles [ setxy random-xcor random-ycor ]/ d7 a' O. y: _% ?
end
4 U3 h( U5 M! E# R: Uto go0 [) V7 w' v( x3 `" ^
move-turtles# J3 K9 H0 c0 n9 j/ T$ ~2 H
eat-grass
2 D# A4 G5 `3 G! k& U& |- A/ b reproduce
* A7 J4 T" U* A% Z# v0 ~& d check-death
# x( s0 N. D7 O5 W0 n regrow-grass( g; C& l3 z/ d
do-plots
2 S M: E8 {% z$ O4 V6 iend
; j' W, C' N$ p6 v+ r R) G' b2 ito move-turtles
* e6 e. V1 P% E1 ?; ?' a- k6 q P ask turtles [. T+ h3 [5 H4 o" J4 x
right random 360
" S5 v9 D) `# C forward 1
+ F. [: z, R4 C5 z1 Q1 N! c3 I& o set energy energy - 1
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end0 x* c2 v6 n: z- j1 e' S3 p
to setup-patches2 \* S( C4 a. \0 u
ask patches [ set pcolor green ]% F7 k. g9 Y' a9 {3 o9 J
end% l8 ?# d7 g- t0 B, [
to setup-turtles# d) u; t2 u* l- ^
create-turtles 100- @% J' c/ m) D$ w" l; S4 i1 y9 x
ask turtles [ setxy random-xcor random-ycor ] R4 O- S; f/ c/ k9 X( |, M2 a
end
`& m# g/ x- Q0 I/ Kto eat-grass& C+ Q/ n2 X3 S% z1 k( P
ask turtles [
3 _8 l5 J$ U4 P; H L' l if pcolor = green [
6 o, g7 ]. h5 i" v; M set pcolor black+ O3 s% d; C0 Z% P8 x: L- C; k
set energy (energy + 10)
W+ E9 `0 t/ `- E0 O( ] ]
C3 H/ W8 y6 r4 J, h& o2 i ifelse show-energy?
) t- N: Y2 j' Y* X* h% D B) d [ set label energy ]
- D% ?. n- R5 T" |! X/ u* f [ set label "" ]
& ~8 H2 h1 p9 G6 o ]6 S1 w2 H. Y2 H
end) J5 C3 E+ e. f" ]1 c
to reproduce
3 }; X% t, }6 d& C, M+ u6 P ask turtles [
7 y) Z: v9 A- W3 F if energy > 50 [
, }: e* u d& ?* R/ o" i set energy energy - 50
# ^: _2 ]8 @0 P9 Y' B hatch 1 [ set energy 50 ]% h# M- f1 U& u4 M$ q
]
3 Q* G9 E6 j1 o( Z ]: o& d# Q) ?7 k% l* ~
end9 o5 N# V" _: m6 b; k
to check-death; ~0 d, R. d! C3 i) ^
ask turtles [( e0 V* z& ~/ e
if energy <= 0 [ die ]5 p5 L: M8 D, i( J- m
]; e8 [1 ^2 O5 G+ j0 g' c; b
end
* a1 v% y& u/ _0 g7 q+ ~to regrow-grass; I/ E; z$ n- o5 O2 e' j
ask patches [- e9 |: r# G- N' [% |$ Q/ Q
if random 100 < 3 [ set pcolor green ]/ p5 Q+ o3 W9 Y9 i
]) R* ]9 Z, ~6 e* j
end8 P+ u# J- \/ W' b% ~
to do-plots8 t7 g: h Z) F; b
set-current-plot "Totals"- \; R D/ Z% f% F. c$ C4 ?- I
set-current-plot-pen "turtles"
! a$ [4 M6 \9 B plot count turtles
# O" h$ ?+ _ u3 Z/ W* n+ \2 B+ { set-current-plot-pen "grass"
* h* L- A9 K2 ~) m- m: ? plot count patches with [pcolor = green]
9 U' q6 C0 ?7 K9 L6 Oend
" A' T) K# |' l0 i1 |. {可是运行时提示no such plot: "Totals"
7 p6 ]: L$ @0 A+ uerror while observer running SET-CURRENT-PLOT, O! }: w. i2 M' B. X2 I
called by procedure DO-PLOTS
9 S6 f O7 h1 y8 R8 j called by procedure SETUP1 c* x% Z9 l" L( Y8 x" n
called by 按钮 'setup'9 d+ }/ {5 F8 B/ o: [# z
求大神解答啊 |