我编的程序如下turtles-own [energy]
# P3 R( C# S. B2 Z8 V$ Z G" Pto setup% K3 m. q, _( F) K. M$ M4 x
clear-all
" D/ l4 d1 r4 J, P setup-patches- q$ [, w8 n* M. q5 b( F0 {7 A
create-turtles 1002 [$ q1 R% ], ^
do-plots
/ [' K7 N0 j; s# S2 v ask turtles [ setxy random-xcor random-ycor ]7 Z4 B8 c* ~1 ^ Q' }+ P2 w
end% _6 n3 K- I- n$ s* K5 w& c" ?& c
to go9 B0 O6 [! A: x: C; T) u0 o+ X
move-turtles
$ B J, t5 R& i( p' k" M eat-grass
Q/ l. v3 f; e- v+ G reproduce7 x; Y& s& @# @; N; Z% ~
check-death
$ F# A9 A. P4 w! Z3 Y regrow-grass; [6 ], G* R/ J( K
do-plots
* p- P- |0 X, z7 ~ p9 ^end
1 H% Q9 y; u" A, a6 Cto move-turtles
+ e% F# ^# x" [0 B$ O% s( } ask turtles [
1 `9 L& C ~' }+ T; c* Q right random 360
( |2 S% o* l b% r2 p+ H4 h( S4 [# j0 ? forward 1
: j1 Y( K) `+ Q4 f8 h6 D/ C set energy energy - 1" i' t8 f9 x) q I+ k0 J: `& f
]
0 w2 j0 Q+ e* Bend
9 U% p8 c0 i" `, M+ `& T; Kto setup-patches
- [' \+ X4 ?& B! [1 k S4 I# p ? ask patches [ set pcolor green ]- b9 S5 ?1 j) W2 _/ D4 d( p
end
. p, c& p# C* `4 g3 Z9 F; Sto setup-turtles- W7 s- w6 q, \
create-turtles 100
$ ^2 }* q* L7 q6 Z' G2 \- E2 U! Z ask turtles [ setxy random-xcor random-ycor ]
0 M x7 s: b: E3 C# ^0 l; x6 send
7 `8 W2 h! f# L# `to eat-grass
/ T1 D+ t# s s# f" R ask turtles [
1 @; y% m' ?$ @1 k3 r& A. j5 h if pcolor = green [. O% {; t* J; v' f* K& `1 O/ C
set pcolor black: V- {1 i7 {6 ~7 C7 s& w/ k
set energy (energy + 10)& e5 J5 W, I( u* N0 b, v. z
]
% i# F5 b, u' z" \' _+ ] ifelse show-energy?2 l7 `9 l0 n: V& }0 \( A7 K
[ set label energy ]. A1 b% J2 I6 \. x
[ set label "" ]
# C2 |% x$ s4 {/ d/ a ]
3 x& `( B5 {. j# J! q, Eend) g/ {8 _" L% ~
to reproduce
' `+ M5 v+ X. N7 y5 ^* l( |+ G+ ]- x ask turtles [- l; O B+ j* B9 Y0 ^7 X
if energy > 50 [- V1 w* t9 P+ _2 P" p/ Z) g# Y& g( y
set energy energy - 50
4 k; _' a/ W, C4 ^* Z hatch 1 [ set energy 50 ]8 O! ~3 J6 Z' h7 d3 K! s, S8 a
]
: B0 |4 i5 Y: r1 e% e+ k ]2 h/ l2 i5 D! Y {4 |
end. e t: F6 |3 v# p6 I9 o1 I7 W2 C* w
to check-death$ r# a. ?. x' c; V6 L) F
ask turtles [
9 [5 B5 J" Z+ d! X) r if energy <= 0 [ die ]
2 A4 T) h: C' D* |5 u ]0 _" o6 O/ g9 i5 S( ?* ~
end
6 v7 E) i+ F a+ D1 n. [( L) p2 zto regrow-grass
( S& ~8 F2 P% x _/ P2 N0 `: D6 h ask patches [! Z7 [, r4 e7 ~; \/ ]! B) A
if random 100 < 3 [ set pcolor green ]; C) f* N8 [* h; V9 ^2 V5 z
]" R! d' ?$ v* d, V/ ], Q8 A
end1 A2 z1 E/ g6 x- z8 Q0 a% V$ }* I
to do-plots) q8 h5 U2 B6 I- @$ D/ ]' p
set-current-plot "Totals". G$ I! @4 m3 l8 Z# q
set-current-plot-pen "turtles"
. D. v& k C1 r+ T& ]+ r6 a plot count turtles9 m) ^' l$ @; O$ Q }
set-current-plot-pen "grass"
2 F- v7 O1 ?& b4 v$ d6 O( V/ r2 d plot count patches with [pcolor = green]
8 s$ q& z1 `9 x* Bend
. c6 c% N. L/ Q8 ]可是运行时提示no such plot: "Totals"
4 Q: \/ d; [! \' k- k- v5 oerror while observer running SET-CURRENT-PLOT
: y3 p' [/ ], B: e a$ t* R9 ] called by procedure DO-PLOTS$ e4 z7 ^" S" o. I
called by procedure SETUP, I5 M$ a! k8 R9 h; u3 O
called by 按钮 'setup' X# ^! u/ ~6 G1 A* K9 O7 O* j
求大神解答啊 |