我编的程序如下turtles-own [energy]
]8 A. i V& K7 i8 Y0 Q' {to setup& f- `* u' j* j9 |' [
clear-all' G( \4 p$ g# x3 c8 s5 `4 F
setup-patches
. L# m2 W: m9 ^: F. D, H create-turtles 100
4 W( ~# C7 j U+ N do-plots
/ \; a; X4 W y+ J( y" b2 V ask turtles [ setxy random-xcor random-ycor ]
* \ G7 Y4 y) u: t8 H5 jend
8 O7 L9 Q$ ?+ P- r( F# M4 @to go
. h$ T& h6 A! P2 Z* x9 e move-turtles
4 @7 _: E# l0 h9 g# D, z% } eat-grass% q, I4 O, E3 K I) j7 m
reproduce% y9 q v2 C$ n' l
check-death6 d% s6 @$ u- |$ g
regrow-grass
! N/ J0 z9 E' x- ~ do-plots$ N# _2 @ _8 Y7 o( d/ j
end) s% P% K" U5 q q$ J* N5 W& l0 A
to move-turtles( w) O+ g* G* m: @
ask turtles [
; c. r( J/ R$ B" D/ y: r K right random 360- A: }3 i4 T0 T
forward 1& M& T3 y7 Q' f- B, |9 [ j
set energy energy - 1
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end4 g, j9 v" ^' V" t8 f3 e4 |3 [8 O
to setup-patches
6 V( y) N5 t; c7 {1 P8 S J+ m, U ask patches [ set pcolor green ]
2 ?0 G0 ^* `* d& u1 J/ X6 Mend' F% e+ Y' Y3 f, G& L8 ^
to setup-turtles
) f/ K! O) R4 A) r" C create-turtles 100
, y8 U0 b4 u) g7 L7 t0 F ask turtles [ setxy random-xcor random-ycor ]
5 S9 t" A! Z6 A/ R& Eend
2 p& u% q, H9 l/ r1 hto eat-grass
% R6 w5 K0 C9 k) ~$ P5 Y A& h ask turtles [
' p* N: P) S f1 ]4 r$ \ if pcolor = green [3 z# a$ ^! t- e- [
set pcolor black
" p1 B9 W2 A! Y; a set energy (energy + 10)2 p6 m1 y. c9 F ? ]* q. F
]
, a8 V: y0 w7 @# [9 v, y6 p9 n% ] ifelse show-energy?7 \' y p, s; _ n
[ set label energy ]8 D+ g: q% ?5 O' @8 t* _# W+ _
[ set label "" ]/ {9 N/ W. q$ z' K; f3 p/ r) A
]
5 a. |0 K) c& i; Y3 D" aend
" D( V2 l( l" |6 B9 x* z. n. N! bto reproduce: ^( Z6 j' i2 E3 O% m( R
ask turtles [7 f, N; G) X6 _. ^- [
if energy > 50 [! ]& k6 O E9 _ u% I, F% F- D
set energy energy - 50
# `1 f! K; c) u; |( E hatch 1 [ set energy 50 ]( O0 _% F0 |4 E) t4 Q( `3 C
]( }$ w2 ?: V) ^9 E: z
]2 u, T7 V* T6 U2 Q: x( \2 P( [
end, w* u9 n1 A+ N3 _! O* }5 Z2 y5 q
to check-death/ z1 x: L( n* @% c5 v L: E L
ask turtles [5 I. E5 i6 z" Y' m% ?, C
if energy <= 0 [ die ]
* Q5 ]7 u3 y% R* x0 { ]
- F' \# P' J4 H) l5 d- Y( x5 u$ Pend
: M. l4 F) q% q) ~, S: r+ B! v( Rto regrow-grass
; H. \6 C5 `& }7 E. C) w8 z/ `0 \ ask patches [
' P/ }2 q# z8 z" V if random 100 < 3 [ set pcolor green ]
+ V9 J9 E; w' t8 u8 @ r0 V ], u' O9 f. L0 a
end! _+ a _8 S( X4 G, Z
to do-plots. \' N- s6 W+ H" u" v) m
set-current-plot "Totals"* ~0 _" _& S* C
set-current-plot-pen "turtles"
& n, ?, X' D" m8 T: d; R: G plot count turtles
1 d- u+ J3 h, o* W0 v* E set-current-plot-pen "grass"8 r7 ^; m7 A7 p
plot count patches with [pcolor = green]
3 m4 y; }1 L% V, V% wend
2 o m0 ?' G: o, ^8 d可是运行时提示no such plot: "Totals"( N- @) H( A, ^* |9 x) A) K$ N! N
error while observer running SET-CURRENT-PLOT
; r4 m7 ^" j, ]1 S) D; L" q called by procedure DO-PLOTS
$ T" ~3 u- X4 @2 A! v; ?6 K7 @# ^ called by procedure SETUP
! t6 b a+ }; ?6 W u( l called by 按钮 'setup'
# T/ ]; E. x. z1 }求大神解答啊 |