我编的程序如下turtles-own [energy]
0 }0 y( w; Y$ Nto setup
/ Z2 d+ B4 i# L0 o clear-all
6 a, ?' I; ^, V4 w Y* O setup-patches
( I' e# t4 `, [1 `6 o create-turtles 100
& z+ S( g/ x7 ]2 G* o' R- e; l' w do-plots
1 Y! T5 Y: v. }/ Q" o ask turtles [ setxy random-xcor random-ycor ]
Z4 W) [+ S2 }: I/ |5 z. aend
, \; ^8 n% B; M( {7 v, e- Wto go
8 G3 m5 ^; {' z0 T7 ^3 F move-turtles
8 ?8 T4 t7 [6 P# `5 `. \* p eat-grass" n# x( ^8 H, v
reproduce
& ]" c' J) ~) X/ W check-death/ J' t1 y' G4 Z! R( X) b" H1 M/ h
regrow-grass8 B1 _; h9 y# d; |7 @( E+ ~9 q
do-plots
; H; ~2 p1 s5 g8 a8 O" |0 wend
, ]" `: l/ o6 X; j" H1 uto move-turtles
2 C% ]8 g! h& P1 a9 G ask turtles [
7 {' K/ h) `& x) J5 x right random 3604 o! Z! G# ?" e! Q. @- F
forward 1
/ f+ s1 t( B. K set energy energy - 14 |1 ]; S G* D: Y( b
]" k2 F2 F7 T& b) U& W
end
6 x$ \1 G) x! J, J0 q6 Q8 eto setup-patches
?3 V6 q" H7 H- H9 `. N6 L2 Z ask patches [ set pcolor green ]4 c3 r" X3 e1 Z
end+ W) s1 I* ?/ D' _: t) Z }8 z
to setup-turtles
+ J4 H/ L; A# M7 ? create-turtles 100
( Z* y$ g+ X, K2 ? ask turtles [ setxy random-xcor random-ycor ]
3 x5 W- n! F5 B( `" X: Oend1 ^5 K/ P* b, O( j
to eat-grass
/ f1 `, T& m7 Y8 j8 u4 f ask turtles [. ~0 r9 e( \2 w; f2 [" o
if pcolor = green [
% X) I @4 [! { ?: |: W: y set pcolor black
! J# Q, q0 J6 \1 y set energy (energy + 10)
9 k2 X+ {( Z) V2 g: f ]
% K7 C! o3 b3 G2 {3 H9 n ifelse show-energy?: w" E F2 M* w
[ set label energy ]: s! ^6 G3 S6 F2 `/ n8 Z# C7 H- h
[ set label "" ]$ O: @2 V0 G- T3 Z
] P$ W) Q/ c0 r; p3 Y7 |: ^/ E+ X
end" R2 U! `( k6 G- J
to reproduce: G$ @7 ~. f9 k( k3 ?7 ~/ G+ w
ask turtles [* [$ \5 v- \4 C0 ^5 n% q
if energy > 50 [
1 h$ ?/ Y4 ?5 b9 O ? set energy energy - 50" Q% n. M3 [' K: K6 k# M2 f
hatch 1 [ set energy 50 ]7 Y( q4 Y2 D- @5 m6 a
]
" W* P4 Q$ _( I( H- B" I/ x ]
7 G) i1 D$ _3 I7 u& x/ l- s( }end8 b4 i- e- z/ ]& z, V
to check-death
! j; ?/ m$ ^2 P ask turtles [5 k9 P2 l. h( a/ h) `$ {# @
if energy <= 0 [ die ]
9 `% J0 U4 I; E" k' c ]# D3 u3 d% S5 a- C7 D( V$ W
end/ H5 W7 Y5 W8 ^7 p; [, y2 b
to regrow-grass
: l- v5 ?5 e4 G6 v0 J) X ask patches [
& o4 Z/ u8 m0 ]& E) y* R* ^ if random 100 < 3 [ set pcolor green ]
- J4 p y. U* ~$ z! ]) q ], [* v/ q9 p M# o9 ?! P
end* E: }! k3 N2 P! Z" s
to do-plots
5 x- m& T1 r" o* R set-current-plot "Totals"+ c! c& s' S! a: `3 i1 m; P6 L
set-current-plot-pen "turtles"
9 c. \7 p! K, Z plot count turtles
: [+ Y! ^& a$ ?% P set-current-plot-pen "grass"" _1 H6 b$ s0 n
plot count patches with [pcolor = green]
$ G6 l+ r4 N- V! Tend
& `' ]* `7 J3 m. D# M6 Q可是运行时提示no such plot: "Totals"% w U( q: H2 x! s2 P0 ^
error while observer running SET-CURRENT-PLOT; Q( [1 k6 U/ ~' q K" f
called by procedure DO-PLOTS- \% B7 u& t% O5 ?$ l
called by procedure SETUP1 I O3 H. s; K1 i0 ~5 {
called by 按钮 'setup' i% M; ]; R7 x; b
求大神解答啊 |