我编的程序如下turtles-own [energy]% s8 N3 S) V1 R- b$ c% q/ l
to setup# r: a5 M% h9 d6 T7 ~6 j) l
clear-all5 W2 W. P, F. D* b0 S7 f! a! U
setup-patches h; b$ r4 U! ]# y! a
create-turtles 100
# q9 N( p4 t$ ~% R4 U; U4 E do-plots# x$ d D- Q7 t5 }
ask turtles [ setxy random-xcor random-ycor ]. W: {, w; ~, g% e1 a: D
end
0 y4 n3 Z9 ~4 s" rto go0 ^* W' k8 Q# b) w7 q
move-turtles9 ~+ m k$ f2 ?' f9 M
eat-grass9 z6 W0 u ]7 S& d1 S" e
reproduce
, o; x% {* \5 h$ X7 ^7 ~9 {/ F: ~ K check-death
! Y' B* Y/ p$ ~; R regrow-grass/ \4 |6 x5 N7 d3 S
do-plots) @% O. d# _, k- g; ?" i' E4 a5 _
end
% `$ ?& v! ?9 p4 ato move-turtles- Y7 w7 @! G+ ~- \
ask turtles [
4 m5 y" q( i4 V3 Q, O right random 360: N: X, r9 O; W0 f8 }5 `3 @
forward 1% l7 Z( I8 R+ s( L' t }4 E
set energy energy - 1
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end' `9 B( u- [2 T5 |" j) M8 ?9 y
to setup-patches p) O4 W! e' C) o3 n
ask patches [ set pcolor green ]% V5 d9 g8 i. m* i0 ?/ G
end0 D! z4 f. a9 n
to setup-turtles6 n* R4 m; h2 D& g$ h8 ]
create-turtles 100
: [ ~0 V' Z0 f; k ask turtles [ setxy random-xcor random-ycor ]
- y4 c4 l j5 A* N& Q6 O9 `end
, \7 }% i( N2 Z1 \% Xto eat-grass, \/ c8 x1 M8 h9 n1 a
ask turtles [
1 L+ B" j# Q3 U' K if pcolor = green [
( c! _, r4 a' v- i+ N set pcolor black9 y4 `* S8 O( a8 `0 S
set energy (energy + 10)
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ifelse show-energy?
! G( p, L' N( C9 m$ { [ set label energy ]
3 _3 Q& h& y( U' ^3 l [ set label "" ]
% E) O5 z0 `) f* s- W ]
7 d6 W2 q9 O3 _& Q5 c1 ]& n3 ?end0 c' m" @8 |) Z
to reproduce
6 x( x# D2 K" ` ask turtles [* J. V7 O w7 Y9 {) b0 N* X, X1 A# x4 R
if energy > 50 [+ G8 U P8 J% r2 R! y/ |8 s1 D
set energy energy - 50
! u6 v2 h4 G% b9 S1 i1 S/ w hatch 1 [ set energy 50 ]6 a/ f+ B# N; \- K
]6 r4 s" u5 G% x$ Z5 h) `
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end9 P/ Q0 M- F# F
to check-death
; H7 n# o8 J9 j* o; c, x ask turtles [8 }& z( ?* r) M; R& ]+ i
if energy <= 0 [ die ]
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9 ^" W- A$ {) ?- Bend4 V h" e: U) |3 ?6 X6 ~) ?- a$ C1 V/ u
to regrow-grass
$ _2 f. [) O: }& y ask patches [
" N' ^8 C) b7 z if random 100 < 3 [ set pcolor green ]: ~2 c Q w" c6 ]
]
5 C& |1 B: c& B4 c/ e& s9 Z8 Send! v; x# \% o& r$ d/ q, M# U
to do-plots
5 ~8 A( ?$ d G U4 g set-current-plot "Totals"
, ^# {3 Q i0 }8 l, B3 R set-current-plot-pen "turtles" O! F W) [8 d5 G+ k
plot count turtles# O9 Y$ D& ~* ]) l# E
set-current-plot-pen "grass"
% A; W$ s' Q" b! ] plot count patches with [pcolor = green]
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/ L" \9 R0 ?6 Y* V- G ^可是运行时提示no such plot: "Totals"
* e, t& z4 ^ A8 e0 K8 v* Y$ lerror while observer running SET-CURRENT-PLOT' G1 Q3 y) Y i5 H, D
called by procedure DO-PLOTS
- r( M3 l4 x* O* m2 u8 V( p, c called by procedure SETUP
" h& s8 ]8 a& D$ g1 I, u6 c called by 按钮 'setup'- y5 u/ S9 f/ t
求大神解答啊 |