我编的程序如下turtles-own [energy]
7 }6 w' E$ k2 ]. y4 \# s6 jto setup
) z9 V( @1 x% b+ g. F clear-all
+ [, d/ x- Y- g5 K- B3 a setup-patches' N8 T9 r0 ?! o. o- Q2 S" z
create-turtles 100; h$ F* X! Z! X" f, o6 ?) ]
do-plots! r b, t i: }+ W
ask turtles [ setxy random-xcor random-ycor ]
! n0 H2 n) f) U7 J5 iend
% \# P* Z2 ~0 O0 cto go
1 y9 b" j- D$ H, Q move-turtles
& r/ r; ]5 ~3 \% P9 w) x6 ^ X% { eat-grass
% A) ]* D) D' P2 g reproduce' R) d" i5 f4 z' H
check-death9 W: x# ^. Y7 n0 y( b& ^- v0 f( s
regrow-grass& @2 Y: S) p& i8 `4 _) J ?8 c q
do-plots5 Y0 r, Q/ y- k, a( M
end0 m1 j4 I2 A* c3 U. u( Y! R
to move-turtles% C9 \2 Y. |/ {6 x2 Y( w& X
ask turtles [5 @1 A% c9 n7 K
right random 3605 A1 Y- D7 Q4 z1 e% n1 P$ x
forward 1
$ \8 j; q! N, \4 n( _2 c set energy energy - 1! B O( [& J/ F. z' w
]. b! {( ^! K- n4 j/ g; D. z
end8 I% V' ^0 T9 @: G! ?% B* K
to setup-patches
- h+ d# S% Z+ |5 @; { ask patches [ set pcolor green ]5 J7 w7 b6 E* v6 a0 P8 f1 S+ |
end, o4 W2 c( n( ?( f* V
to setup-turtles; K1 j1 i2 m5 O+ ^6 j6 |( S) e
create-turtles 100/ ~$ o4 @3 d8 d# O
ask turtles [ setxy random-xcor random-ycor ]
/ R3 P( Z0 q6 Q' V5 a" w4 J; oend1 R6 b* m; E9 L3 D1 w
to eat-grass0 i' s2 x5 T& L* K3 w
ask turtles [
3 `* S- ]4 Z& P* H! x3 _( `2 P if pcolor = green [
, O0 @3 x# Y% X set pcolor black
) I8 K5 X: R* G, v set energy (energy + 10)8 X) ~# d) j; k& c3 e! `9 K
]
' w: k5 R6 T, @9 O ifelse show-energy?
, V& x ?4 S* ~8 p- ~+ ]0 a [ set label energy ]6 l# A! m1 T' K5 m- S+ H) x
[ set label "" ]# U: L* I, C: t/ ?/ e- k$ p0 {
]0 k; n% X, Z6 ] o; u- F4 ~, k
end& i5 T% D/ m+ m" ~
to reproduce6 n; N/ c* `! x0 W. R8 |
ask turtles [
/ k# H, d7 z% x6 u( P* s; E if energy > 50 [
& d) [1 j' D) N$ l, W set energy energy - 50$ {$ Q9 E& B# Q1 |' m
hatch 1 [ set energy 50 ]2 i* C8 \2 S9 F- M. |
]
/ M8 }/ `5 W/ g$ d( I2 o+ K7 T0 v ]; \: ]* A$ ~& \5 [/ i' W1 H- \
end5 T. E$ k' A G+ f7 I8 R
to check-death) a. R0 J7 w& \5 K
ask turtles [3 l% Z6 h% Y4 Z3 L! M6 ]8 M9 c
if energy <= 0 [ die ]- {" E; y" }4 W6 C
]$ i! G: [) s7 D
end8 ~$ X) S1 w: p$ X! u
to regrow-grass
# [/ N5 s( }5 O- W' g ask patches [* G S4 t3 g$ ?* j0 F' J- C7 l
if random 100 < 3 [ set pcolor green ]( E6 Q8 [' U5 F0 D, G( c: O9 `
]% q& F/ @( _0 K' n: W
end4 a) B! Q, y7 X& ^3 s5 V% q+ l
to do-plots0 S! A+ w( x: E. o- G& C
set-current-plot "Totals"
/ u% d' v2 @6 H2 H( ^ set-current-plot-pen "turtles"
5 ? Y- B# I* u* }" o3 a t8 p plot count turtles" T" j9 c( X- L; {4 H* ^7 h1 i
set-current-plot-pen "grass"
5 [0 k$ C; @$ ^' h- o) x) g! ~ plot count patches with [pcolor = green]
1 ]" |4 ?) |8 L) Tend; Q& @4 L; ]/ R- ?: v d9 `" T
可是运行时提示no such plot: "Totals"
8 d+ J' s0 Y' oerror while observer running SET-CURRENT-PLOT
8 Y+ s' X4 x1 q: Y% X6 l; _% g called by procedure DO-PLOTS y k8 j# t o2 i' v
called by procedure SETUP
2 B3 s1 J% q) U& K+ j p called by 按钮 'setup'7 z$ d @' `6 N/ L
求大神解答啊 |