我编的程序如下turtles-own [energy]
/ i, `1 ~! V: W2 d4 s1 Bto setup
% k9 H7 u* f/ d" I clear-all1 t0 F9 c! `' R
setup-patches; A6 b9 [( `6 Z" c
create-turtles 100
$ `) B; g _8 `9 D do-plots, T) [3 v" @; L$ F: M# Z k
ask turtles [ setxy random-xcor random-ycor ]( P" W. H& x. e* N
end
- g- u1 Y" v& [4 v- @9 @0 e5 fto go: w( x0 K. V' K7 V3 u) k7 D
move-turtles6 [) g: D- X2 H: V1 A5 ~
eat-grass; ~' X1 b, K$ n) H( }3 h
reproduce5 F/ D `4 @: v- E: n1 k
check-death/ H3 g. \. q! f' |; i3 g+ F# D' T
regrow-grass7 O0 p- w0 F! z* j p
do-plots
5 u6 T5 O" T1 q, R9 P# iend/ b) p0 @2 v( O: ~
to move-turtles; j4 b* [$ V; ?0 E1 l, p( P2 p
ask turtles [7 V$ X% P* H3 C* v4 M
right random 360$ M: W% f5 L# j) q! I2 U& \4 B
forward 1
; d/ ?# E* |1 U% C9 ~ set energy energy - 1/ P6 x5 l( q# g. }2 J4 v
]5 H, B# i$ T5 s7 x5 a' l# U: g
end% y' s1 d, p' k7 j* c- n3 Q, i% F3 c
to setup-patches
) \" ~ @) k) w$ o, P. M0 L1 I. ^; F ask patches [ set pcolor green ]7 u: |: {: s6 s6 |; h
end3 L& b. P2 W6 l" W5 y
to setup-turtles4 [0 m+ X8 ~4 g( H
create-turtles 100
% L5 n U% x( o6 F ask turtles [ setxy random-xcor random-ycor ]
# E/ I& R4 _" u3 F% Hend
- }0 j7 |: e, N: B& r- s9 @6 fto eat-grass. f' j; W0 n! f# _* c; D& u* u
ask turtles [
* y0 J0 \( N# x6 m; M* c if pcolor = green [: Q, o: P) b" ?+ ~3 @! N1 z% @
set pcolor black" [) f: H( W1 E: q R$ n
set energy (energy + 10)
8 x6 ^9 b- y [8 W+ `. E6 Z ]1 b9 y' B! W+ d, K& x% [
ifelse show-energy?
% `/ B* g) I5 V: d [ set label energy ]
# z5 j- ]3 l, f. O# | [ set label "" ]7 I0 {+ q' p& z t- T$ n0 P
]2 t1 j' z: C4 A; \2 [5 E% O
end" Q" f+ @) s. ] X" ~# O
to reproduce
- I& v& q r! q2 F ask turtles [3 O# n: V& O$ |5 X& o _
if energy > 50 [0 W1 a4 G/ q# H/ z+ I+ x
set energy energy - 50
1 y+ m# w9 U, J) e; v: B" W4 S6 y hatch 1 [ set energy 50 ]; N- H6 r. H+ S4 J! m# B+ L
]% E! _7 Z# T% S8 s6 t
] s2 r" x( I7 Z& B' _
end
( f: I8 `2 W: T4 `6 z0 jto check-death
7 s) @( q, h" y& {- P/ k. ?. r$ A ask turtles [
* L5 T$ P" `& e+ ? if energy <= 0 [ die ]. a% m# A. w# @1 _6 }
]# R- L8 [; u5 T+ M! a! c( ?* m
end' T/ `- {8 N9 x d
to regrow-grass1 a, O; I) R; X* ^
ask patches [4 l: d8 Z+ i% ?+ {1 n, V
if random 100 < 3 [ set pcolor green ]
. e9 r0 d" x' O( ^! m ]
5 W; c6 F, N8 n Y) ~/ Qend
! c; j1 P; I9 e& x% @to do-plots
6 K0 H9 u w) y* C' x. x# s4 m6 M set-current-plot "Totals": U! m: x- V, m3 P1 j
set-current-plot-pen "turtles"
; x; \. ^5 ^0 ]- F7 Z plot count turtles
7 r; N2 k/ E! r3 l* w set-current-plot-pen "grass"
. g7 x- f+ v. V: l/ W9 G plot count patches with [pcolor = green]
/ X& ~0 T- w I$ [* qend+ T2 r7 T$ ^- M3 X
可是运行时提示no such plot: "Totals"
) d3 [2 P' g( Y! `2 cerror while observer running SET-CURRENT-PLOT
% d- m8 X" Q! D* U called by procedure DO-PLOTS
) P! f* u2 [, }) a called by procedure SETUP
9 N& c# G' y4 |. `. c; } y called by 按钮 'setup'7 E) b* o) b" H+ D
求大神解答啊 |