我编的程序如下turtles-own [energy]
/ h6 m* S, \2 M+ o1 H) mto setup
9 [1 }- u3 R# e( g9 Y* r6 \7 j$ p/ ^ A clear-all% T6 g4 b0 n; q
setup-patches( j6 X2 q1 S3 k, U
create-turtles 100- l- h6 Y1 Q. X- T& |4 D$ D6 A
do-plots
7 G- q% q4 l# e% K+ n( v% o& B" q2 x ask turtles [ setxy random-xcor random-ycor ]. ]' h. b3 z t: \. C8 t- u
end
t8 P, l1 G# J- B- e7 tto go
% Y# u5 c% B5 K) T move-turtles
% o H( h0 s$ j9 j% i1 n( m eat-grass
) Q2 H( e' S3 G* y @1 } reproduce
: O3 J; }" A( U check-death7 M# f) m* L7 v
regrow-grass- g, ^+ Q7 o8 w( D
do-plots! q( \! m0 ~4 ^9 g4 C
end
' S# I5 u* @ L* Wto move-turtles# O& [. x' Z& g8 U* ?* n/ x
ask turtles [ z$ _7 X2 j/ m6 }4 Z8 Z+ g. b1 M
right random 360
) t4 e; ]7 @+ d3 z5 g1 s a! a! Q forward 1, z+ w+ K/ F7 ^/ C+ I3 D' z$ l; J
set energy energy - 11 d* R: h/ n. ?0 _4 h8 D) H0 H
]
s& D4 E3 \( r' [6 Vend
+ t5 F$ }2 q' z. j6 dto setup-patches
6 z/ R. @7 w. D7 I5 P( K# U ask patches [ set pcolor green ]
! [1 g y# R3 ?) }3 A6 Rend
5 d/ @3 Y/ o) k/ [4 Xto setup-turtles. |% c& Q$ K) g
create-turtles 100
+ H# B2 X6 ~, M8 ?. j8 k# X ask turtles [ setxy random-xcor random-ycor ]
7 }+ L2 N7 s& X: M( g j$ j& Gend1 Y; `6 L& K- O) I
to eat-grass( {: M1 ~- c& V9 @+ \+ u5 e. I
ask turtles [
& X' k* n4 M5 d, M% M if pcolor = green [
: y$ P: C) V9 D. N6 D, Z l set pcolor black1 P; c9 H2 ] a; O \& r
set energy (energy + 10)5 g) e: s. p* b, c* q
]
* W3 P! }* C3 S ifelse show-energy?
3 U( F6 V: ]* o# O' ~ [ set label energy ]
}6 M) C ^! \( i0 _! ?; }- j( B [ set label "" ]. {5 C V7 H& P
]) o+ [) L- d! x$ R) h0 E. n; Y
end' g) A- J! D- Z8 O
to reproduce
; Z3 }9 `/ y! z3 v0 X ask turtles [
0 u- R" O0 k3 Z2 d1 k& t if energy > 50 [
8 C! j& e& {5 W1 Z( R9 R {' C# S4 ^ set energy energy - 50
* g: t- d% ~" \: U( {8 O hatch 1 [ set energy 50 ]
% h. ?6 ? @' K8 u. F. G( i- B ]
2 ^& H* x0 n" C, n" P* M' e ]
+ Q/ O% G } {end
$ d% P* x( a1 M# k; W5 _: zto check-death
4 E: e2 h1 |$ E( Z g" |2 f ask turtles [. y' ?$ s: C S- E( t* I+ r! I$ I
if energy <= 0 [ die ]
( ?: r+ J( M% k* u% {* n4 B) ?6 \ ]
6 {1 e9 L. i7 Y4 a- r+ wend
! |, F: U7 L; k4 Q3 B3 Cto regrow-grass, I) E+ Q5 y3 X" B
ask patches [7 U5 ~ V Z: B& g) E
if random 100 < 3 [ set pcolor green ]
, h3 W; T* p& y2 g ]
- f" b9 C6 ]. R! Oend
5 I( S( ]% P& ]4 c1 q4 ato do-plots9 N" G9 ~ ?2 X* ~" _
set-current-plot "Totals"- s) \& _1 @; x% Q
set-current-plot-pen "turtles"
9 M4 X* {' y# E# Q4 G+ B5 G7 ?% H plot count turtles
, f& f( N( l/ T5 c- H+ Q+ B set-current-plot-pen "grass"
, B5 U8 o8 _; S plot count patches with [pcolor = green]6 D4 A# C0 V4 F
end
/ w3 N7 N+ s2 _0 \0 ]4 U) w( F1 {8 g可是运行时提示no such plot: "Totals"
! H2 f: W3 V+ Merror while observer running SET-CURRENT-PLOT
, n; ^: Y& _# C9 N- l called by procedure DO-PLOTS. @5 e8 B% Q3 B0 @3 |4 s5 N+ ^* I5 ^
called by procedure SETUP
9 i6 J5 {# j9 R. Y ^, i called by 按钮 'setup': Y9 k8 \7 @& w% }% q' I
求大神解答啊 |