我编的程序如下turtles-own [energy]3 c" u6 y9 Y; z" P$ I
to setup
, G A' j7 S/ P7 x clear-all6 I! \2 W* }8 _2 E6 a0 h/ V
setup-patches7 ^; K7 L$ x t$ G6 m
create-turtles 100
/ r6 W. a$ ?0 [ do-plots
! w& R) A& J' f) \$ @- O ask turtles [ setxy random-xcor random-ycor ]0 C1 X' v7 d& `9 S8 w# h; r7 t& J* M
end
" v7 S* C! E6 x' kto go
4 f# E% \1 J& z move-turtles/ r% Y2 Z$ [3 x6 {9 U, V9 J4 C
eat-grass' o; E+ S6 N- \% ]$ z) C8 y
reproduce8 w5 S, u' a9 Z- `
check-death9 [2 X/ t/ j# C
regrow-grass: T5 h0 b8 o2 M ^! \) b# _9 o7 E
do-plots
% S* {; C) v5 `) S: Q3 d9 J5 vend6 I' n0 u% i7 K
to move-turtles
) p- W, R) T% d2 k0 n ask turtles [
- r$ ?1 u4 ?+ M! N d right random 3605 F& u! ?$ y9 [/ m% [! \8 m/ n
forward 1# `3 [ e3 I1 x1 m+ o
set energy energy - 1
& |& X0 E7 P; x( E% ^2 D ]+ g5 T6 I1 A! B& C
end. e3 Q l4 @ W) w" r1 e7 k
to setup-patches5 x3 @( ]% f' B" k) e; T
ask patches [ set pcolor green ]
+ `, K6 I5 z) u- m7 \end# H4 S: }& e1 O" W* d# `
to setup-turtles; }# Z( O( |' u, {
create-turtles 100
; I- B; A* ?* T1 ^' {/ y ask turtles [ setxy random-xcor random-ycor ]: w$ j1 P5 j" K6 L J* L
end/ |7 k+ H9 b. b4 _, _) V9 P8 [0 a
to eat-grass" V8 A* u1 y2 _5 ?3 I2 A& f! _: ?
ask turtles [
9 z- \2 g6 f- k, V1 B3 z. u, r if pcolor = green [8 {- C) x, p- r1 f' g
set pcolor black, Q; T5 ^3 X, j6 H) [
set energy (energy + 10)$ w9 X. @8 B. q4 {6 x
]3 f e9 A& H$ {9 p* N
ifelse show-energy?
- r( e2 ^* l% Q# m, n5 h5 S* m8 ~ [ set label energy ]
% G, u, F1 a* D- l [ set label "" ]
* C* W2 Z' H0 O3 j4 E ]+ d3 y6 R/ Y3 \6 Y T, v8 s+ i
end2 ]9 ^' T/ D/ }0 D8 |
to reproduce' O9 \+ A3 K/ @ T' @9 F
ask turtles [
5 h% r- _9 S; F [ if energy > 50 [: h# o' D- p' x7 A
set energy energy - 50) J5 P+ r0 o1 l3 M, E4 ~% t
hatch 1 [ set energy 50 ]
6 X5 z% m1 _& y2 v9 W, y ]8 C/ D5 s3 ?* z
]
% }" d' H* _8 Q' |end% `/ ]* Q7 {2 N1 D# l& n$ L- b
to check-death1 @% v+ {7 `- M0 m |
ask turtles [
# v; H0 ]8 r0 F7 b if energy <= 0 [ die ]! K5 F! P! i& }5 g* b: N6 p2 x: I1 W
]
1 b# F' L# w) K/ `: ^end
" _8 m# S( N$ p7 k Xto regrow-grass
: j% t/ K7 I+ M1 A9 r" l+ }& N ask patches [4 d+ f4 o2 Q( k% f; a
if random 100 < 3 [ set pcolor green ]7 ~. Z% s& h8 l
]
6 d4 l% m6 ^. m R- t; }6 ~end
0 w9 u' S3 V" x, Uto do-plots% {2 G* q/ T: m7 r2 N
set-current-plot "Totals"
" o; i( c3 [0 I set-current-plot-pen "turtles", u. m! `8 M: C! Z+ E- i' r
plot count turtles, z0 S6 H) g0 D9 l
set-current-plot-pen "grass"& \( }/ |: I2 y! o" h6 g- ?& Z$ C% H
plot count patches with [pcolor = green]! z' D. U9 P/ z* @ y% h& M
end* Z( A$ z5 z. d
可是运行时提示no such plot: "Totals"
! X. \: Y6 G" cerror while observer running SET-CURRENT-PLOT
3 S. L* u4 }; @0 Q called by procedure DO-PLOTS" c8 h1 Y$ u. ?% }7 n
called by procedure SETUP) Y; S2 v. |2 u! i5 w- F
called by 按钮 'setup'" B5 p6 r- `5 ^7 ]
求大神解答啊 |