我编的程序如下turtles-own [energy]: P7 ]; Q$ W; j. A: ]1 L
to setup, I$ T" W. M8 c* Z: U
clear-all' ]: E$ y* F% K- o6 ~% T
setup-patches
: i0 q f# ~5 ^0 H3 F3 j! P create-turtles 100$ H4 ]! `) ]# Z8 m/ J6 A8 ^
do-plots
0 k) s) q/ y, |# ]9 b% }+ |. S3 r* } ask turtles [ setxy random-xcor random-ycor ]9 q- ]6 v1 f n1 a) o) e) t
end* q- @& h& P. ]
to go N7 Q4 A0 w, C! X/ i9 N
move-turtles* @- ]; `0 V5 p5 F) p. j) O
eat-grass
8 r7 p# k$ T% y8 d reproduce/ G0 ` Q5 V ]2 ]. t3 }7 ]7 S0 s# Q
check-death
- n4 S6 v2 P- T regrow-grass' \" z3 c# W# C* o- L' r' U- m+ f2 n
do-plots
' V# ~( ?, b9 b3 l bend
( G: H, `7 P N) p! p! ~2 F# w: Gto move-turtles
( o2 M9 A6 M. v" N! Q3 V ask turtles [
8 Z* k, W6 m& I+ N5 h* q right random 360- B0 F; P0 Y! N& T1 ?3 J d
forward 1- K0 C; W: c+ m4 L* i; _% ~! u- _' _
set energy energy - 1
; E) \4 j9 o/ V7 h$ X ]& A: O% h- l5 o3 B
end. \. ~7 l" K2 l2 F
to setup-patches
# _2 ]3 v' [) c* Y7 s3 ?, a- r. K ask patches [ set pcolor green ]
9 _; S1 |% j b6 D: e8 ^ \$ Xend
2 C( z# @* y" @2 nto setup-turtles
5 t6 ?5 o( {8 [. M# W( P8 Y create-turtles 100 N$ U) y+ z- M% Y9 v% z7 N
ask turtles [ setxy random-xcor random-ycor ]
: \8 q+ }& \0 O- Send
1 \8 @) G. |0 F0 \7 ^2 e0 _to eat-grass/ `) D$ M+ c) ~) ^9 ]2 y7 c
ask turtles [
( a' q) a' j' P9 K0 z* e if pcolor = green [# R# Q. y( g" }" i( E' N
set pcolor black
# T& v! x; c4 U set energy (energy + 10)" ?9 }) z; |1 \
]
. R& N; Z/ H w; Q4 K; \/ U ifelse show-energy?
) J4 Q& |2 G" G0 m [ set label energy ]
0 b1 W! l' S2 |: I' u [ set label "" ]' X# t' _2 R1 N3 H
]
: B7 M2 Q7 g6 Bend7 ~1 F2 ^2 O. D3 w; X* ?) b! X
to reproduce
' r8 y5 A( n5 ]3 M4 Y% q ask turtles [7 @* e6 M) U" M. U4 E& `
if energy > 50 [+ K6 ]7 |' K# W: j6 X/ @' T
set energy energy - 500 V1 m- Q8 H6 O/ ]% l9 s
hatch 1 [ set energy 50 ]9 {8 k2 } a* o- u8 c
]3 Q) F- [ a. @9 Q* I4 C
]
# ?) V) I) T" gend
6 @( W7 l7 B+ [to check-death
n- h& @- ^0 O, ]3 @7 X4 E ask turtles [
. X) I M% p4 j7 \' v2 s if energy <= 0 [ die ]
' \$ p: a( n, ]$ e1 s* {/ _ ]8 L1 G& ^/ L9 `6 c2 d
end4 r3 \3 Y- @7 \2 V8 R% ~
to regrow-grass
2 Q/ \7 } j% k( _! e! @ ask patches [& p7 i2 i- m* d# ]9 P
if random 100 < 3 [ set pcolor green ]
z! r' v$ B. [+ k( Z3 p) j9 M% B$ K ]. W' m- M ~7 t+ n) p' k5 W
end
5 u# Z; }- | q8 Y3 g% X' dto do-plots$ _) ^7 y& L0 E8 g2 Z* X, ~6 V' L
set-current-plot "Totals"
9 A. P" _; b, m* q& n; F set-current-plot-pen "turtles"' X2 [9 U" X: h0 V0 ^4 W
plot count turtles/ @9 e! U8 ~' I0 s
set-current-plot-pen "grass"; J: a% P/ F1 u
plot count patches with [pcolor = green]# y" F- J3 Q8 [& r5 @4 G" @
end
1 l5 F5 T4 m- O8 n* N5 v可是运行时提示no such plot: "Totals"
7 a, P. r( I4 J7 ?error while observer running SET-CURRENT-PLOT5 u! ~1 P5 @- D! \6 D5 D- P V# L% ]
called by procedure DO-PLOTS
+ E" n) ]3 m8 X6 L$ z! U+ D9 Y4 h' e: H called by procedure SETUP# Z1 b H- {4 T$ D7 y' N5 H8 t
called by 按钮 'setup'6 h5 h3 g3 S- x8 W* T1 Z
求大神解答啊 |