我编的程序如下turtles-own [energy]$ p& x2 i. C7 ?4 L: Y8 {
to setup
. d' l* Y1 B% j: o clear-all
8 k+ p9 r+ x6 M4 l setup-patches
4 X& r' ~8 J& e create-turtles 100. C4 O" ~8 x* E! ?/ h
do-plots% _( `0 o+ Q O9 x3 Y( T
ask turtles [ setxy random-xcor random-ycor ] K; K: K# R8 g
end" \, |2 r9 O% ~9 n# V
to go, U! n7 }1 G% z+ K
move-turtles
9 c+ L. Y, O( ^7 \ eat-grass( ?. ~1 y/ n4 W, w+ G5 F Q
reproduce" g& k" Z ]8 p9 F: f/ e" Q! g
check-death$ Z4 _5 I0 {0 R/ H$ ^7 _
regrow-grass' v! N! O6 w7 a
do-plots5 v. k/ O2 ?6 G# r
end' c' B" |: t% l( b. K, C
to move-turtles
1 e) l! ?! L" I' K) H ask turtles [
1 F2 \% L; z( x# ^ right random 360% h$ e4 t6 _: q4 S2 @- n9 ~/ C
forward 1+ H- D" ]5 X! P
set energy energy - 1
$ { K: Z, D0 }4 g ]3 g! I' z8 _0 t6 x
end
/ G# L, P# W \to setup-patches
x; [8 b4 s0 u% x ask patches [ set pcolor green ]
/ i, I5 _* X: _, h2 s) mend$ t. c$ ?8 Y: r
to setup-turtles
. _4 E4 k5 p8 c% W5 \* }. p create-turtles 100
6 F0 E" y) A, z- b ask turtles [ setxy random-xcor random-ycor ]4 o/ |9 w* F" ]* U5 d
end
; v* ^) U T% e( z/ h' Y3 y9 k: fto eat-grass
% g7 G" j" H3 F4 \; R" g ask turtles [
( x2 r+ x0 W& K& E4 c2 X if pcolor = green [
- b g$ `) y# U set pcolor black0 x# z8 z6 h+ M6 k
set energy (energy + 10)/ G- B! D& d1 ~8 G/ W9 ^( U
]
- ^: Z: C/ J m' ~! {6 A ifelse show-energy?
/ m) { C- K7 m, ?% C% r: [ [ set label energy ]1 p) b1 U- R b6 |" n
[ set label "" ]
8 T; W2 y: I! \ ]0 H; g& I% E+ b) A9 L
end0 _$ T+ j* p/ ]
to reproduce
- u ^8 n" M { ask turtles [- K$ O/ q7 R3 T& w
if energy > 50 [
! |4 I& h3 c" I/ M4 E set energy energy - 50
( X H8 E3 e/ d, X: ]# n U6 B$ W hatch 1 [ set energy 50 ]9 f8 Q( v5 d, f" v8 \/ }9 ~
]) j" t- \. L7 V2 z0 i
]1 M8 L' K3 y! S: I
end
" p; p0 s1 i8 I5 t- v1 j& zto check-death7 f' q5 `: j+ u! b0 W( m
ask turtles [
$ E1 D' z4 t7 ]' Z& y# G if energy <= 0 [ die ]
( ], D& n" ~7 |% G* i0 a! F ]' z' G& R0 c9 g7 D6 V0 ? o' V
end
3 \. n9 P% B/ H/ _7 Z- Hto regrow-grass
. u' v, i* @8 I' d2 \ ask patches [1 ?( u& }" u8 [- t
if random 100 < 3 [ set pcolor green ]& Q3 ?0 K0 W& a( e' k+ x
]
' p' }6 h$ V$ lend
6 R' V+ ]' e: pto do-plots
2 d1 A; Y/ I& q. ?3 e9 j set-current-plot "Totals"
7 T d4 L7 N$ L3 `2 f, b set-current-plot-pen "turtles") U1 R5 J% L1 O+ n
plot count turtles
( S6 U K" R* @1 M _ set-current-plot-pen "grass"" ?. l6 S* q. R2 j* ]: X) Y4 u
plot count patches with [pcolor = green]+ h4 `, ?; k4 }4 s
end
Q( i7 c1 n8 c! u9 w0 z可是运行时提示no such plot: "Totals"! K; c3 I: W' ]6 A' I. E
error while observer running SET-CURRENT-PLOT( p$ i! `4 T! w& z" r& l
called by procedure DO-PLOTS% W* B$ Y4 a1 M# p F' r+ L
called by procedure SETUP* u/ w5 _0 W! a, G% n% |% m
called by 按钮 'setup'
! y0 P- K* w% F% D; T d1 O求大神解答啊 |