我编的程序如下turtles-own [energy]
+ |. r8 E# y7 \7 a6 G; Wto setup6 Y) m) w- u- O
clear-all2 j6 X" |( {+ M
setup-patches
l7 z& v9 v; D5 y0 F4 }6 m3 \ create-turtles 100/ l0 |0 a7 n2 `& w! }
do-plots
$ e8 [. b2 {1 O0 s ask turtles [ setxy random-xcor random-ycor ]: @' ]# b0 n$ ~! i* M+ Y
end
1 Z9 F/ z$ {, _- xto go
5 O9 D& B0 j u7 T move-turtles2 d8 a, ?3 G2 @0 ?3 P7 u. E
eat-grass% ~, D' Y/ D r; G
reproduce. V# p. K( `% H* Z1 m/ e6 d
check-death6 y+ N; u7 c2 l; Z- ^% q
regrow-grass. b( `# B6 k. V3 o0 {
do-plots
% B; n% ~5 n, R6 ?; {! fend
( A$ I/ L: ^5 v6 f& Vto move-turtles2 d) c2 w" Y; Q+ v4 u# K. T
ask turtles [
3 X+ M" b' l* J& V right random 360 P! ~" s1 C5 a+ L& n( o! v
forward 1
6 {9 l* d; _+ j, ^6 U/ r; t set energy energy - 1
7 f' N, v K" |1 v8 P! q ]
: V% C8 x E: N$ M$ c: [$ bend, y* ^- [- T" m
to setup-patches8 Q$ X* H& y4 h: l) d% v* L$ x
ask patches [ set pcolor green ]
2 `: |' S! y3 F, Fend. ` t0 E2 y; ?
to setup-turtles
1 l4 G+ p( n9 a0 E& U6 D create-turtles 100
$ q z* B- N' s% }. K ask turtles [ setxy random-xcor random-ycor ]; ~8 h2 @. r9 {) k
end
u E2 K$ P5 N: qto eat-grass: |6 m$ B( J+ E
ask turtles [
! G0 b9 m9 u3 x. I if pcolor = green [
0 \) \" V+ l/ z. E5 O/ k set pcolor black, Y' c- k" i2 E- s
set energy (energy + 10)
% K. J, Y7 @$ \ ]
2 p8 L) r$ w$ T ifelse show-energy?
. N0 d+ Z3 I8 E f' P [ set label energy ]
; [+ H0 T+ |. Y! E! N$ F; r1 C [ set label "" ]) n0 g6 y1 N& C, V9 f
]. m4 F, \# C A, ~8 Y7 b. w
end
5 r; @8 T: K9 q v0 D4 gto reproduce$ P: f6 H' R1 X2 T! L1 v V- \
ask turtles [8 U4 Q- Q, |. W6 {- Z" Z, b7 f
if energy > 50 [
" }+ W+ s0 {% q set energy energy - 50% ~2 i3 z4 v: M4 r; I' L
hatch 1 [ set energy 50 ]
5 ^4 E! F- \" Z$ O8 p/ L! z ]' r/ h j) H. V% z7 R, y* X
]
5 b9 J/ [; H& ~end
* C% R# L; ?2 j* Hto check-death3 m: v& f* }: X) m2 B
ask turtles [- M3 L2 D' |6 L9 ]+ p
if energy <= 0 [ die ]4 B4 l: y3 Z5 E/ k- L; b
]
# V9 Z6 }6 u0 gend
9 P0 L% b5 a- y& r# d8 zto regrow-grass
+ N3 p8 L/ D# X ask patches [
1 d/ {& J }; ?/ {7 ?: [ if random 100 < 3 [ set pcolor green ]: Z" T7 V9 Q( _% A' T N
]
( n# Z& n5 k+ j4 `) rend
, {/ y" s# T T4 D" xto do-plots% [/ A* N9 }" D& I9 C# c4 k
set-current-plot "Totals", v4 R: Y9 W! w/ p0 q, T4 s$ U
set-current-plot-pen "turtles"
n$ T$ p3 U5 ]# @ H, Q plot count turtles1 \4 m, J( v2 Q, [$ j2 m1 F, O& o$ e
set-current-plot-pen "grass"( m, T% I) ?- Y" ]2 q
plot count patches with [pcolor = green]
/ A& W) \8 ~* @; T5 \end
( n7 v5 t h$ t! `& A/ t' x/ b可是运行时提示no such plot: "Totals"
, k; {! M) H8 O) o" Q0 Lerror while observer running SET-CURRENT-PLOT; P% \( ^% X7 ?. b1 ^* J0 y5 Y% Z
called by procedure DO-PLOTS
; I9 W& k5 B3 n called by procedure SETUP
$ Z- y/ ^7 Q8 W& @4 w4 e) w9 e called by 按钮 'setup' e8 h! e$ ~1 x4 W- A
求大神解答啊 |