我编的程序如下turtles-own [energy]9 H3 O' p1 m/ f6 }! E/ e0 Z
to setup
9 l- E7 U0 a, `( f8 H( F clear-all5 i: z3 @, ^6 ^; N7 ]2 \
setup-patches
8 [( T7 t$ i1 M6 K create-turtles 100: R; e5 o1 v9 R6 E8 ?
do-plots
. g9 U$ t9 e- B" J6 s, j ask turtles [ setxy random-xcor random-ycor ]$ Y7 G& D5 i, |7 K( f
end- R/ Y2 D8 C) A+ I- I( j, _ G
to go3 P. S1 H$ ]" B2 I; Y2 e
move-turtles
! {0 m7 p. W9 N! a( }5 q eat-grass
& d' ~* q. M3 U, n9 T& c reproduce
$ Y8 r* r8 L* b- p' [ check-death7 a6 N: r: O. q" ?5 L
regrow-grass1 H* k0 i! ?' [ e+ }! i
do-plots
, S; f- B' S" W8 R+ Q5 Rend1 B, \+ V% q: \. Q$ B* _
to move-turtles; F% o5 `# S) K' }# b" J
ask turtles [# u" ]. e! J4 h1 h4 ?7 ~
right random 360
4 C% |$ H1 u( F- o0 Z' s forward 1
; [+ M. R; w$ b$ f, F% d( u- ~) s* i set energy energy - 1# o8 ?8 a2 D' b3 _3 U
]% W; S# |6 Y, A2 t' g m( C+ {
end' {0 u, y e/ S) l+ {, q! K& f% O
to setup-patches6 _% L/ v+ K$ N
ask patches [ set pcolor green ]
4 p5 X; u3 ?! l7 Y5 {) d& `end9 S( v1 {; R% E5 B/ ~5 K3 F% i* w
to setup-turtles, D: i7 ?0 L- d2 @+ G( L( R
create-turtles 100
$ W# Y6 Y; L) {3 n3 z# i$ P+ Y; p ask turtles [ setxy random-xcor random-ycor ]
" v Z/ I b" `2 r+ f8 k" Wend. [; _! c6 N9 L* d0 }% ^
to eat-grass; E1 I2 o' D) |
ask turtles [. `3 W+ `5 Q: Y$ {7 i0 m. S
if pcolor = green [5 r/ t6 o5 ?0 h/ ?
set pcolor black/ h! K' I8 q& S# c9 r% s8 x' D( b4 N
set energy (energy + 10)
8 c7 Y) f: {4 B7 z1 z8 X ]9 o; f4 N b8 D5 `! n$ c$ i
ifelse show-energy?9 y# s% `( g, J1 H
[ set label energy ]; D( k/ J) o/ \) V5 \6 J
[ set label "" ]
3 u* V* {+ r4 m ]
0 r) H; R7 H! o! J& ]" \end( [" i# L& Y3 Z$ Y3 y
to reproduce
; q ~( ~( |0 f ask turtles [6 ^& z* m; {% z3 {. Z5 b
if energy > 50 [
& E0 q" N; m' v) t' H) g, X set energy energy - 50) e5 h! A2 L% m' ^
hatch 1 [ set energy 50 ]1 ^" h9 A; H9 \9 s! g" j
]+ n. A l& A" E$ \$ B2 V
]
5 j5 w! u- o5 D+ R- C, k% O# \. ?end
2 k$ `. V3 q5 s. H6 i# v3 x6 V5 Mto check-death# h: }; Z0 ]; a" X# Y: x; ?
ask turtles [
; L3 ^8 W& Q' V3 p" Z if energy <= 0 [ die ], O5 z7 Z8 z! o% ~2 c) r
]
* x4 x( d4 y& O* f5 R: Q$ `end7 O- g+ J- ]5 E2 X i) u
to regrow-grass
) U" k# r( g1 q4 {3 ^7 G' w& q ask patches [, x& ?. h; Y' Q2 Q
if random 100 < 3 [ set pcolor green ]
' O* t" ~ I/ S: V* t ]
/ x0 |+ p3 ~; S9 K" E9 Send$ [& _! x* k* @+ X
to do-plots' K* N2 i) W: x# X+ V9 i, O; m/ u3 c
set-current-plot "Totals". ^; X( T) ]# P1 M5 I
set-current-plot-pen "turtles"! o! L4 t8 W0 H i- w
plot count turtles. T5 f- u: z K9 U
set-current-plot-pen "grass"
1 f' W. L/ B w6 | plot count patches with [pcolor = green]/ x: j; o* B+ A$ A
end
8 u; f9 {: Z2 e0 I% y1 I# R. E可是运行时提示no such plot: "Totals"' c1 @+ t2 F5 F% R, N+ A
error while observer running SET-CURRENT-PLOT
* Y5 R4 F/ P8 a# O7 h& |7 e# T) a called by procedure DO-PLOTS
9 g% [$ u4 n) n. G+ k9 M called by procedure SETUP7 q, t; A; u, n Q
called by 按钮 'setup'
7 X4 \& W7 {3 H; H求大神解答啊 |