我编的程序如下turtles-own [energy]
7 `2 i$ X. k# X' ]6 g0 Rto setup
. i7 i0 r- n: p. r5 Q& \+ L7 h clear-all9 n0 m$ K- y! K5 ]" l
setup-patches
- x& P; {- g0 ~) l, i4 q create-turtles 100
4 q. r, i0 A: l; t4 `6 m. a do-plots& i+ [/ W3 @+ }6 C1 n6 l7 a4 R
ask turtles [ setxy random-xcor random-ycor ]
1 f g: s. t6 p4 }) Kend
6 N- {0 |9 ]8 k6 L- gto go
z6 X6 X- U$ M3 U% z0 s: {% y move-turtles S: @+ e5 V# a7 p
eat-grass
5 R4 g, k/ j3 [& O% ~) I reproduce
+ e7 m) r% ?+ O! m4 W- c+ [ check-death
4 M* ^5 x- \2 ~) M1 B regrow-grass6 p1 u6 L; ^/ P
do-plots& }3 {# ?( g! b1 A) y0 F9 q
end
; M& K5 D% M L& L8 Uto move-turtles/ a: Q4 K% u8 M g
ask turtles [
& W3 [7 ?5 d7 ]6 R$ U% J right random 360/ _3 e3 `/ E& F" z c% Y) J& v9 V
forward 1
& @9 o, v7 @: z0 e; |8 ?9 ` set energy energy - 1( ?% i7 [$ g& s! U X' w, L0 f# Y
]
" M4 h$ Q2 V/ M1 V8 V5 vend
; Z6 v3 `3 C$ f( r/ Bto setup-patches
* ]% Z' E6 @. |' u9 t ask patches [ set pcolor green ]! }7 e) S! B1 L/ D) G
end- u B" x: _% z) W/ }7 ? A4 n
to setup-turtles+ h- X! Q, u/ D) A
create-turtles 100
# h* i# Y3 g2 Z# ?7 v ask turtles [ setxy random-xcor random-ycor ]9 A/ ~, j/ }- ?6 |4 X
end
3 v% R: H9 p0 Y- b! ]) H, F, tto eat-grass( l( Q; ^* D5 X6 w' H% ]1 v
ask turtles [7 {/ m: U; z7 F* `! b- B5 W' h
if pcolor = green [
) z, ?) F( n$ p6 R( F n set pcolor black
" ^: w' w5 a0 t7 | set energy (energy + 10); |8 Y- `, O3 O
]
: l- O% z% a; F7 K4 g6 u8 A& u d ifelse show-energy?* I2 T8 Z0 u2 k/ G3 C, U
[ set label energy ]
3 ~/ `! ^0 S% f( N2 h4 O, P; W [ set label "" ]$ J5 P4 M) X' z
]& e* D2 m" t* \9 r
end; ]$ i4 R) k5 ^; F, z& L
to reproduce
" x) w1 ~+ s0 b( m: q3 \! N ask turtles [# f& S6 D) e5 X q; z1 c
if energy > 50 [+ Z& v3 y( j; _0 t
set energy energy - 50+ k" [. \& M3 B Z& r5 e
hatch 1 [ set energy 50 ]
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; M! ]* K% w% \0 [0 o( Q ]
2 V+ @; Z% v% d$ ]; p7 Wend8 j/ J0 T4 Z; g2 a* d# V# e
to check-death
' I6 @8 d# X$ g/ [9 Y ask turtles [
& S0 g( Q( J3 f" y1 Q) v if energy <= 0 [ die ]
# [+ W# L* G |: x. J. W% {( y ]
7 D% y2 ?" O* g7 [+ q2 {4 n: n3 K @end: |* j0 \0 F$ O+ M5 i
to regrow-grass0 b7 j+ t) c6 |3 M7 N
ask patches [
9 \4 U- X) Y8 H7 |) l if random 100 < 3 [ set pcolor green ]( g F0 }- ?, g
]% x1 f7 D$ T3 e! p6 U
end" k3 N' z4 J, ^& X7 N N3 e
to do-plots- I& `$ t5 s1 C
set-current-plot "Totals", Z" J2 N; r- z, T& ]) w2 @
set-current-plot-pen "turtles"+ p# E! T8 @; ^3 U
plot count turtles5 a) e; t2 N5 P( I
set-current-plot-pen "grass"0 n) f2 H1 j9 w: i7 E% l3 ]* J
plot count patches with [pcolor = green]
/ D0 [( w8 g7 F% ?end
& P* {8 K4 r, F8 `& C可是运行时提示no such plot: "Totals"
9 A' m8 K' D0 `% X0 qerror while observer running SET-CURRENT-PLOT
8 H$ h* ?; E r( H; Z* } called by procedure DO-PLOTS% s2 Z6 o: E" U! G" {# r. ~
called by procedure SETUP% N* n! v- N4 R8 `7 X H
called by 按钮 'setup'
. ]$ C* P% r( H2 ?求大神解答啊 |