我编的程序如下turtles-own [energy]6 K/ ?8 j9 @ m& l7 f
to setup
( o) b( ~* p7 }+ P7 C3 i# Q clear-all
- y/ `) `( ?: l) E, g, g setup-patches; q. ?. [8 {) G
create-turtles 100
3 T! R: G# Z# e% V0 h do-plots
$ [7 M7 _, H3 z3 ? ask turtles [ setxy random-xcor random-ycor ]
3 _9 e4 b) }# l4 Pend
; b( o1 C! j9 A/ ?" B" u' vto go
1 I$ Q; o. |+ ` U8 w move-turtles
/ ^( e' l9 v' B0 j) k2 t, H! l eat-grass5 l3 M$ g; K3 q
reproduce# V+ ?+ _/ t- f: p' [
check-death: s8 t. E" R" M, u8 u
regrow-grass3 I1 U& f1 f) Y! S& e* x, H& M0 q
do-plots8 O+ i% v/ i, w
end2 f: e1 J9 d( p' h& v4 ?7 P2 y3 W% _
to move-turtles
# |. Y( N. T: T* V7 W( z2 ^ ask turtles [
% H0 h, ^* g& E2 e5 O, m' x- l, }% r right random 360
( G& V- b* Q* _ forward 1" w* x% w# ~' p$ m+ h% |# l
set energy energy - 1( z( S! N( l9 s+ M' u* [
]; F( M* [& E) t" y
end
4 ?( F5 n# U& o/ {( o. @8 x$ R* Y( l; ~to setup-patches
0 o8 e. Y6 S4 y8 l0 c" H ask patches [ set pcolor green ]
2 u( W5 N" S1 b# zend
$ a3 v0 B# Q i3 o: I- Lto setup-turtles/ w: W+ X; F8 ^& `7 A, w @- ~1 g
create-turtles 1001 d: a' s2 f# k% F* M
ask turtles [ setxy random-xcor random-ycor ]$ b5 ?7 A. H6 L2 B
end
3 Y Q z) T% w. C* H2 x/ wto eat-grass
4 ]3 p( }) @; e8 h6 r4 I5 ? ask turtles [
/ m" r: _4 W1 n# b if pcolor = green [
. B7 N, Z! t7 } J- j set pcolor black2 x4 x5 @) w. ~9 `4 H2 k+ C# f
set energy (energy + 10) J- m% f8 P9 N
]
( [$ N# ]5 x C ifelse show-energy?# _; ?! U, A2 X5 ]5 ?* r
[ set label energy ]
3 j3 {8 Y- U7 T6 w# p [ set label "" ]
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end
# o" Q: q7 w* s) ~ ]- @. jto reproduce) J2 s. U t: w% E" r$ A
ask turtles [! r$ M3 ? L& B- @
if energy > 50 [4 X/ K/ @" R M" f
set energy energy - 50
" J/ e; ~5 K1 L9 G- K hatch 1 [ set energy 50 ]( o. O; D1 @% p/ P" E
]
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end' R2 f# ?: E9 [$ S) A7 Z' |8 Y
to check-death
9 J$ Y' @+ T& A6 ?, q) m1 b- r ask turtles [3 c% F3 |1 {: z0 o, ~% Q% R
if energy <= 0 [ die ]: R3 ` k8 T. b; ]
]
, I5 a1 K% o/ t9 ]' q6 Q4 U8 fend; `0 c K+ |2 B/ |* e [
to regrow-grass& S+ g: x9 M+ L! ]* C/ a- b& L/ ^
ask patches [
" C# `1 ]( x; }6 ]1 [( |3 r7 Z if random 100 < 3 [ set pcolor green ]
9 I2 Q% w& G% E9 J0 H5 |8 B ]. _% N2 N* b. }* v9 @
end
8 @, m6 g, c9 O' S3 n# o4 bto do-plots
: L0 a: m& ]" ^) M0 Q7 n set-current-plot "Totals"
0 ^0 a( `. W+ j- V set-current-plot-pen "turtles". G) ]1 b' H @% n2 P. w9 L
plot count turtles8 {1 [# D4 W2 G) \" C0 w+ `" C8 h
set-current-plot-pen "grass"1 p9 R! }/ y2 a8 J0 Y
plot count patches with [pcolor = green]" \; `( A% H- g" `/ p% `, E
end
$ i; C$ A; {- R; L s/ b2 g可是运行时提示no such plot: "Totals"
7 R# G: S( Y2 {9 ]error while observer running SET-CURRENT-PLOT7 N8 p$ z6 j+ x N/ s2 p4 N+ [
called by procedure DO-PLOTS% v* L& W; _9 }# O
called by procedure SETUP5 E. _5 v; \8 ~* D; M- V0 y: _. @
called by 按钮 'setup'
; L4 G& M x& k* X6 z求大神解答啊 |