我编的程序如下turtles-own [energy]
) H$ e8 [9 E% w# H% U! ito setup
- o% |- s- d7 O% ]* v clear-all. H! H' [& {# [/ B2 O$ m
setup-patches/ l" N1 e6 D9 o$ Q# S. j
create-turtles 100, ?$ _: f8 D, B7 L9 n
do-plots
$ b& U" B Z: L4 h$ D ask turtles [ setxy random-xcor random-ycor ]. s. |! A2 O/ X( v8 B0 }# c
end1 G3 h* T% M3 l3 m* G
to go, z3 M2 q* K O( o. R* n! e
move-turtles
& X" g9 P- Z# @* F" F eat-grass; b3 [7 F; Q- N' K! z6 x( p
reproduce
1 O& S0 S4 c6 n. f; `; f. h check-death
8 c2 ~& x" O2 t5 C1 i regrow-grass
7 f% W7 u1 {/ V. ?& M- y/ I do-plots5 T- w# g' {" `1 w( V K2 |
end
6 O9 n9 T" p7 ~" |4 u7 cto move-turtles
& E s6 Q4 X9 |- u7 u0 _4 E ask turtles [% e _( j( a3 p5 o
right random 360
3 F) O2 E: C( F) `, w: n4 @) t" l2 N forward 1/ _* T! g8 y+ C3 Q6 ?- |% c( B
set energy energy - 1. `- n" X( s5 f1 m* v9 f
]
2 {+ M$ L8 o6 u0 Jend
/ [8 j1 K. i+ ]1 Oto setup-patches L+ Q# m3 t5 y. `; ]
ask patches [ set pcolor green ]7 m% r) L' ^& m' R$ k* |
end
- Y) P9 w& i' |9 ~$ |; Hto setup-turtles1 K4 ^. }- b4 @, H, Q" A9 f* p1 a2 x
create-turtles 100
. I) E/ F. i z( m/ x" Q ask turtles [ setxy random-xcor random-ycor ]8 n& _" D1 a9 G6 @( T7 I2 Y( k
end
3 V6 T" e$ H# c% }' A- I0 bto eat-grass* v$ K0 ^) H! R; b
ask turtles [
4 P$ j8 ^6 x. @& }. w' W) E if pcolor = green [
0 U" U5 @& E* L set pcolor black6 k$ L @' @+ ?& r7 T
set energy (energy + 10)
" E! t8 ^7 h0 r2 V) h5 Y0 B ]$ C9 P" z' { v5 u% a1 L
ifelse show-energy?+ b' u) y) f$ I9 J
[ set label energy ]+ g, U6 o9 z( y, Q" x! B* t
[ set label "" ]
; ]3 n& ?: n3 W0 n0 o ]+ F8 u. l7 E( k9 m! w) u7 m0 y
end
3 j' Y- v3 d' Oto reproduce
4 ?) j. N6 F3 ~5 K. d" D ask turtles [
# L% |% P; m2 U/ ^7 y0 e if energy > 50 [' a0 n' S% t. \, {9 ~, f
set energy energy - 50
$ q/ N9 v! l0 N: S9 k0 u7 g hatch 1 [ set energy 50 ]# j& b$ c) G. M2 }6 D: K7 T, v
]& ?1 V: m9 o4 p; ~1 L
]
" l( ?. \3 F8 P J4 Gend
: q' j- _ E6 ~" a$ Ito check-death
( Y3 N0 F, Z' w# w2 v ask turtles [
; `: i" ^# Q% X2 ~6 M if energy <= 0 [ die ]
) {8 x" U% h1 h$ O+ v6 K4 z ]
& E1 ]" `/ e& d9 U$ xend9 _+ Z x* ]( p' F* }
to regrow-grass G+ X% N. I; e$ D& W0 j9 q7 T' U) {
ask patches [
9 }8 E8 K' X/ b4 v, v if random 100 < 3 [ set pcolor green ]' R- W( _; B1 G4 k n
]
- [; I! s* |" O5 v& y" C z% Hend
6 t/ ^& p r) q% D" G2 K9 Hto do-plots6 b4 j0 w. s P' V+ l5 \1 v) e b
set-current-plot "Totals". j9 D1 y$ h" U0 t
set-current-plot-pen "turtles"4 z% D" d6 s4 m# Z6 H" S O
plot count turtles e. t0 l) L) }8 y9 E+ L8 \! s
set-current-plot-pen "grass"8 m& U3 | s& ]+ n8 i b
plot count patches with [pcolor = green]
$ i! l/ K6 B& a8 U# ]end! Z! X6 c; x" J5 h7 n8 ?; E0 S
可是运行时提示no such plot: "Totals"8 X. N9 s1 I* n2 z. B
error while observer running SET-CURRENT-PLOT
7 X& P5 Y6 L4 A* k' R called by procedure DO-PLOTS% S; c& U- [3 ]6 v6 {3 G
called by procedure SETUP
2 F4 R+ n, ]! D( |9 e9 M' g+ r called by 按钮 'setup'" X9 {' f8 i7 _" S" D: h H3 d
求大神解答啊 |