我编的程序如下turtles-own [energy]
6 K9 `# S/ G. q4 m* ito setup
' M- A- E+ X: L. d+ }1 s clear-all( T0 M/ r5 k N, N: H
setup-patches+ B" u2 O7 E$ w6 A$ {7 o9 f S8 j
create-turtles 1005 W9 \% F2 g4 o/ M% v
do-plots3 e% }+ R% k& ]. T3 g7 w1 ~ I3 u9 i
ask turtles [ setxy random-xcor random-ycor ]
- e' i* O0 `3 T8 I: k. zend _5 P, p# `" t2 |# G' L
to go$ E* R" y) C* z7 Z |4 c
move-turtles( w* D0 q& ?) G S
eat-grass
* B# P5 C& _- e/ W3 M# o: w reproduce+ }- o5 G1 {5 F- z
check-death
* q- M; v8 {3 v) x C$ d0 a regrow-grass
- W$ k% ]9 i9 c% `. N2 ? do-plots
! w- Z0 H" J3 `* `# n- X- J$ \end
4 S1 N8 U: e6 E( c( g: W8 H' d' ^/ x0 v" Gto move-turtles
" D2 o# E9 t' i c: M2 ?: c ask turtles [ H& q. K: q) T: ^1 x
right random 360: e5 T) [& K% C# {+ H
forward 1( w) x9 Z: V7 ~ A; _9 [7 R) @
set energy energy - 1
% X. D2 o: s3 M3 }) i$ N; b ]6 q$ F7 h- x9 \: H, P4 c6 ]
end4 e9 b) y* [3 x q* G8 G
to setup-patches
; V' t" Y, ^6 Y0 u1 D ask patches [ set pcolor green ]
, Y' p. t1 l" {- A& D p9 Dend
" A5 g$ B7 i2 H5 T! ]6 T. r0 Sto setup-turtles
4 X8 W+ y$ R" f1 `2 k+ C$ ?. a/ b create-turtles 1006 a3 Y$ j( X6 b: V
ask turtles [ setxy random-xcor random-ycor ]4 T4 T5 M ^ d8 W) E9 \" Y
end
. j9 H* N" J2 W' bto eat-grass
4 ~# r6 F8 b: L( @+ j! [( [ ask turtles [) [* u" ?: d/ z: ~! w, ?: v% q7 j9 h
if pcolor = green [
" T& L7 |. F0 H set pcolor black+ H- O# b/ U: l. c% w8 r0 v) z
set energy (energy + 10)
! t! H8 P/ [7 o% o1 j! { ]) [/ n: _" G: H, }7 x# ?7 e
ifelse show-energy?
% t3 `% s& U. |: M! J1 q [ set label energy ]
! s, L2 n7 Q- B7 s; S3 Q6 X [ set label "" ]8 ?6 f2 C3 P% @ ?
]
. E4 L- F1 y: \& a4 k J5 Eend
7 Z& m% f: Y* m) Lto reproduce
' {/ _0 z$ `# R# p, F" r9 @, _! } ask turtles [" u0 r' r9 I3 ?1 J
if energy > 50 [
, R- j5 K/ I* v: M* o# ] set energy energy - 50
2 [1 b! h* ?# s+ g7 o. n hatch 1 [ set energy 50 ]
# F% S7 n3 \2 W- u- G5 _ ]
( M7 S" @& a3 i/ g3 N ]& ^0 a" ^3 d+ P; h
end
8 V2 S( C' ~1 i: z! N ]to check-death% E' D2 k( P' T2 K# V- Q
ask turtles [4 a7 R* q9 P9 B7 e5 L# C8 j
if energy <= 0 [ die ]3 j8 C2 h# P9 I/ y
]
' z- l/ B. f: V9 {end! T- S, u- _* ~: H: D
to regrow-grass
: p$ _$ X, [4 H ask patches [" W% ^6 k6 `3 b. W; D
if random 100 < 3 [ set pcolor green ]6 o# U- C+ o i3 N. e7 Q
]
( t% r% ~9 i; `0 I# J& b+ Z$ rend7 t% P! w; ?1 g% H" @# d6 i
to do-plots8 z; {8 M9 U" M
set-current-plot "Totals"
; ^5 }& [* j# X$ ^' F+ F set-current-plot-pen "turtles"5 X. u. w5 a* m5 [8 J5 {0 i
plot count turtles
R% N0 U( y7 N0 w5 T2 ^ set-current-plot-pen "grass"/ I( K/ K$ b2 f; [# l
plot count patches with [pcolor = green]2 E/ T+ e: f' R' L( [8 S- c
end
- |4 p$ i; t4 s' j h+ L可是运行时提示no such plot: "Totals"! ]. U4 K' e3 q2 a+ B. M7 U
error while observer running SET-CURRENT-PLOT
- |. Q6 z4 q- H% s% E5 L3 L called by procedure DO-PLOTS
" \ y( c: k/ @+ `0 s called by procedure SETUP
7 g* a& d _) z/ O# _( B called by 按钮 'setup'
6 `' C1 s- O3 z1 S( Q% X, ?7 q2 ~+ ~求大神解答啊 |