我编的程序如下turtles-own [energy]
1 A( v" f" R; G- f- Bto setup
7 Q1 J7 C% i0 a1 O7 c0 X/ M clear-all2 X. B/ h1 o; |! O1 I1 L
setup-patches
3 G$ Z7 i: v8 v6 g. P9 [ create-turtles 1008 u, W% X7 [& {; \8 t
do-plots, e9 S4 G+ L( u- J0 V; |! Y
ask turtles [ setxy random-xcor random-ycor ]. s) i D- G# `- n$ R3 a1 `( I
end
, O0 ]& [2 }+ V( s) Ito go2 h8 N4 V; u/ C( h$ f/ K$ n, e) }
move-turtles
* @* [: Q# P+ e: h, D+ X eat-grass& s9 ]( i8 H' T" i6 a% B6 ?4 v
reproduce
5 c. f8 z8 [8 l v9 H check-death
# [+ s A9 Z5 ]/ H regrow-grass
( S6 y% q" v" u do-plots
# s8 c. C) x/ S! a3 Z4 Bend+ ^8 T+ X! d* C5 X4 n$ g
to move-turtles; b& A: v* [- o& C0 y. u; K' ~# V
ask turtles [( A5 G7 {, T6 M0 f; \8 S
right random 360
! H. f3 m# c2 s) X- }' z# F& R forward 1
6 P2 M( E& S& t* d' s set energy energy - 1( H; d; g+ R$ N( h% k% D
], Z2 s5 a4 x' t# @# }; m
end
6 C# n0 p+ x6 C' Lto setup-patches
* E6 e U/ B' y! a' Y& G# ] ask patches [ set pcolor green ]
/ Z% Y; E- O& m! yend. A+ ~+ N: O9 a: Z0 N6 Y
to setup-turtles
% c1 u" j1 @# Y) ^ create-turtles 100
4 A7 w, G+ T$ R ask turtles [ setxy random-xcor random-ycor ]5 U, o% R% p1 f- z# t& v6 K& u
end
$ m2 r# t/ c0 j% Mto eat-grass
* N; H2 c- i9 J; r c3 y+ L ask turtles [
- ^+ Z3 G$ R8 p* a: z if pcolor = green [& X4 I, \3 e+ m
set pcolor black
7 D% t- I' S: |, d5 X1 G& W$ N* }: R set energy (energy + 10)
1 u. i/ f5 }2 ^3 { H5 J; R ]
" O+ _7 A6 b- w7 v( K ifelse show-energy?
3 S; H) H0 m- I" l$ G6 d [ set label energy ]
6 i2 \' \6 T8 ~1 T* g. w" f5 _ [ set label "" ]
$ i. z# V2 R, ~ ]5 f' ]. S. c8 y7 V1 o
end
6 r: F b4 y$ j% J6 qto reproduce
( N8 T3 N8 `! `1 {6 J+ f ask turtles [
" t) V/ ~$ n5 ?$ ]( ]; B if energy > 50 [" v! M! N# E' [0 H* M7 M) h6 e
set energy energy - 505 n. k* n8 m- U$ U/ K& {- Q
hatch 1 [ set energy 50 ]
) Q8 @% `& s& [' |: x, b" U ]
1 W0 ^5 |, L! b; g) C0 |4 [; ~: z ]1 L, D* M) a. b6 d" h; W
end# {6 }6 s/ R% A7 @8 @! ]$ C
to check-death$ V+ Q4 Q- Q; T' n& Q4 g4 U3 m3 V
ask turtles [4 F$ G2 B# f; }! G5 g7 M
if energy <= 0 [ die ]
- ?% S1 Q) U3 X1 L ], p+ g* U. D/ U d
end
) M6 h7 g) g( k. g/ {. Zto regrow-grass: ] K, m' I; ~3 a: q4 C
ask patches [
% B1 O3 x W+ y ?! |% p2 q8 D. N) i9 z: h if random 100 < 3 [ set pcolor green ]
/ l6 C9 |2 M, n: U$ l( B ]
' R; b; p( a) w2 Nend
/ j* A+ R- H( _; A- p* m yto do-plots
% N. p- m, v) n9 n; A( H6 j& p. I set-current-plot "Totals"
1 i! n- `7 a& |1 c set-current-plot-pen "turtles"$ V7 _5 f I9 G# l3 L
plot count turtles
% Y% j: W; B P+ J5 I9 n$ J set-current-plot-pen "grass"
( h6 D% G5 z# D. s plot count patches with [pcolor = green]& [" ?) ~% f& S6 h; v$ z
end, G$ R7 f$ x7 {, C+ d8 W9 Z, u$ z
可是运行时提示no such plot: "Totals"
8 e( i, h, w. a6 `error while observer running SET-CURRENT-PLOT
- C2 c' ^$ E6 [ r% y' Q# X called by procedure DO-PLOTS& Y! p) z$ Z4 k3 ~; t8 g- p
called by procedure SETUP
! i9 U7 X5 f3 C3 ], U9 l/ t called by 按钮 'setup'
$ z( p0 N/ g$ n( S9 W- h4 M求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
