我编的程序如下turtles-own [energy]" J6 J& L. p8 [5 R k$ Z ~' i% j ^
to setup3 G, o* L/ Z8 i- p1 @" M
clear-all- e- C* R% x! O+ k: S% A/ F
setup-patches
7 h) [$ t% X$ k$ W: s. T create-turtles 100
! f9 `- G+ L- y' O* w. C do-plots
* [; K; |3 g7 k3 ~$ Y3 a' V4 v ask turtles [ setxy random-xcor random-ycor ]
8 F9 l5 b1 g7 |- Zend
7 G& |& W" V2 N/ ~, F) w8 N( ato go
3 \, S9 a* t- r: e; {2 k, N move-turtles3 ]* X0 s" E: K1 ]
eat-grass
, T8 h- i5 b4 G+ |3 x reproduce! }$ P. I- `9 u3 G
check-death- n# r1 p. A. r& M' f
regrow-grass9 [1 @- a2 s% `/ k# X: j0 W
do-plots6 W7 t% U* n, ], H
end
' I3 R/ c9 L. d, n& b# X6 C: q7 kto move-turtles' C4 {: d1 S: f% p* i+ x2 z/ S
ask turtles [
. ]( n k% O4 T! v9 V right random 360/ L+ S6 V- W& p. f- Y1 `- z
forward 1% ~6 |" ^3 {* ^5 f9 v! C; J
set energy energy - 1
) g" e! N6 I6 m0 s1 U+ } h ]! D5 w8 N) M2 a/ E# B8 d
end
7 l# k# I5 K: T2 {. ~( Lto setup-patches4 B A# n2 w* C6 n" R
ask patches [ set pcolor green ]+ v: e4 t, x | G; g- Q/ K
end: `- y! E8 l; q
to setup-turtles
% \7 e9 o1 j( }8 s7 k6 L; c5 b M; d create-turtles 100: D- y' V# |" S6 o/ {1 S: j7 e
ask turtles [ setxy random-xcor random-ycor ]. E' g( C+ T }
end
' L1 Q8 x: Z. Oto eat-grass
6 L. m; w1 ], O6 M2 Z M ask turtles [
7 H1 Q" S' @0 t- t5 W. s' N if pcolor = green [
0 i% G* K3 J; q4 Y set pcolor black2 ~* A! G+ P0 ?
set energy (energy + 10)
6 t$ R0 D. E4 d5 Z/ x& h' P( f ]
( U0 r& Y3 z" v ifelse show-energy?
2 ^! N0 a! R' p4 E/ R3 t [ set label energy ]
+ W; J, D0 W0 Z' c0 s [ set label "" ]# i0 n6 _: Q7 {- A5 m$ g/ [# a
]9 N4 _8 U( ] v4 o! F
end
% M7 b' [- Z8 X" | Fto reproduce$ |9 s' @* Z2 c7 N. H ?
ask turtles [
& g( v+ F$ k( b8 X0 E+ C8 Q* M if energy > 50 [
; p+ h1 X: y4 M4 P- s& K; \* o set energy energy - 50) P* H& i- Y5 p" ]
hatch 1 [ set energy 50 ]# ]# f" L6 G. |9 O k5 z
]8 T4 w6 c- C9 A& a# I
]2 g% Z; `: K1 C$ Q5 @! u5 S
end* Q9 v2 x5 s8 b8 F1 d! L- W" A
to check-death$ J% l a: S/ z8 T% K
ask turtles [
/ }# m, Z0 M$ F# G if energy <= 0 [ die ]
. A0 g4 z7 p3 N" d" S ]/ [+ E1 U' s% z! B4 Y
end4 s2 R) o1 T) z# U: ?6 [
to regrow-grass
" S, \- X; d0 p" j ask patches [, L% j8 p+ ~- }
if random 100 < 3 [ set pcolor green ]
% w1 k. V3 q: l. z3 A; u* K0 e/ g3 A ] {% Z6 Z% b8 e" A" }
end3 u, t! Z; @# n0 p
to do-plots7 U+ g- r1 M* p5 _
set-current-plot "Totals"3 x6 {5 s ~' h/ O
set-current-plot-pen "turtles"( u) X, l9 I0 P, ?) |
plot count turtles7 t2 |& {; s5 \5 P
set-current-plot-pen "grass"% ^2 [) }8 t4 [+ p4 U$ s
plot count patches with [pcolor = green]( P/ [! k' `# q) A8 ]& C) j- P
end
+ p+ B0 v) S. T, @可是运行时提示no such plot: "Totals"
6 q$ {! h( V) {error while observer running SET-CURRENT-PLOT' r: `+ [* q) [! M' l
called by procedure DO-PLOTS8 r4 J% Y* B: I
called by procedure SETUP9 ]. i7 I! D% s& B
called by 按钮 'setup'$ Y4 j' e6 U$ A* W: Q" K
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
