我编的程序如下turtles-own [energy]
/ P$ ^) K. ~2 }0 @4 B% Lto setup& h( P7 w6 U3 k; V j- S$ [
clear-all
& o' b4 R/ T3 x5 _ setup-patches3 Z+ `+ U; `" h: U0 o8 c7 [
create-turtles 100
0 n( I9 B" g6 y' x! G do-plots
6 N- B5 e8 f6 Q' M6 ?. m$ U ask turtles [ setxy random-xcor random-ycor ]! o' r0 }/ v& o
end
2 f, \3 _2 K0 Y: X+ L$ uto go* `/ K! t o( Y8 }
move-turtles
! f: {2 z' U U: j! h' B/ T eat-grass
# r4 |1 T) c8 ~6 ] reproduce2 `! D4 [. _( @1 j# t6 V$ y
check-death
# Z- t; n8 a4 s" m2 A regrow-grass2 h T+ J' U5 \- V7 k
do-plots
9 O5 w1 y, w# m/ b1 Y/ Y2 Fend
0 H% w5 J* g3 a/ B; {to move-turtles0 Q+ B& A# \$ V: m9 ?/ I
ask turtles [
% C$ Z7 ?4 I i right random 360
4 o1 W0 p- E) v. c forward 1
& X* P! G1 K! @7 y" T- X set energy energy - 1
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end
1 A- m+ r7 f, B. J6 t% ?! r) bto setup-patches$ X7 N4 i- a6 ?6 }3 L* g
ask patches [ set pcolor green ]
: i$ ?2 B# y3 iend8 C) p$ ?! d$ X s
to setup-turtles
) n7 `: x+ I: X3 b0 P3 L" k, [ create-turtles 100
5 F/ B/ }% m% M M- D+ g) r ask turtles [ setxy random-xcor random-ycor ]
8 S" h8 H1 W, X# \; ]& H+ G8 `: Xend3 l! j! M# Z/ b7 h7 ~$ b7 B
to eat-grass2 B3 F1 l- s) f+ | E! w% [6 f
ask turtles [
, N/ w# H9 @/ W/ X, ~" ? if pcolor = green [( N5 R; j6 Y* P7 x4 @3 `# a( r5 y
set pcolor black
3 L# n7 G" |( K# X set energy (energy + 10)
. j; y. X, U' b5 W* p8 _2 l ]
' F! C! x ~3 u7 v$ W, K: E ifelse show-energy?
; k. Y) }, A; A3 b+ [3 I- ~ [ set label energy ]6 n6 [# \0 g9 \! m. ` g
[ set label "" ]& }8 H. u7 O" j/ G+ }6 J
]& D1 A- N4 n# b5 Y/ K
end
; S, s, L6 M n3 z2 N& ?' cto reproduce
4 _/ ?8 U% f: K- o) n0 K ask turtles [
/ m) V, K6 q2 Y* q" E3 {6 q7 Q" t if energy > 50 [
( G! T+ ?- E$ w set energy energy - 50; v9 \7 p/ E4 a' M2 S3 H' T3 P
hatch 1 [ set energy 50 ]
1 w U9 }5 @; Y# a1 } ]
/ ?3 ]6 {5 |& g* b4 L6 C1 U- l ]
/ W0 D! o5 S' n6 Pend @4 R* w& o" p1 b" W: Q
to check-death
0 I0 R9 o5 T4 @% F' S" T ask turtles [
# {' f/ }6 `8 t; e. Q* V8 t if energy <= 0 [ die ]
7 ]5 ^1 M6 O* t. |5 D7 ]1 Y ]
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to regrow-grass. F( u) C/ Q0 o( b1 q
ask patches [
6 R# e' c8 E' k$ k* K if random 100 < 3 [ set pcolor green ]
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, t4 `! d+ B* x- ]: {; J3 ?% Send# m8 g m2 B8 k3 Y% B+ c& l8 S
to do-plots8 l. ^: L- @, y, n; z. [0 j
set-current-plot "Totals"7 m" p3 X1 x9 G! J5 t8 n
set-current-plot-pen "turtles"
; L/ w, @* A4 T plot count turtles
$ U7 s5 T* `7 R# r; n set-current-plot-pen "grass"
' S( t! ]1 j. [3 e o& [ plot count patches with [pcolor = green]7 H5 X) C& o8 P9 T& \- b1 I q
end
G# e2 H4 }$ m) x E, L- ?可是运行时提示no such plot: "Totals"
# K) L: `: Y" L8 Werror while observer running SET-CURRENT-PLOT$ o+ I' F- y' Z- }& P
called by procedure DO-PLOTS
/ Q0 p. H5 T2 b8 D3 Z5 k/ f called by procedure SETUP
1 u9 K' G& B. s" E called by 按钮 'setup'
* {9 k0 j1 w0 C求大神解答啊 |