我编的程序如下turtles-own [energy]
! ^" J$ o3 P# h/ rto setup$ ]- |/ |, H# ?
clear-all+ d& O& w l) f3 O, {: F: C$ L! Z
setup-patches
/ ~6 w2 f) [6 d. C0 ~3 A9 @8 N) y create-turtles 100
+ a+ J5 x6 t. |( D do-plots
( O( @3 X% N8 z- T- f# G ask turtles [ setxy random-xcor random-ycor ]
5 O$ v: Q6 A3 \0 Fend9 x& I% F, N4 i. N3 o2 z
to go( ~# A& D% {9 h1 O( n
move-turtles1 p* q. R6 S D6 K% S C' q
eat-grass: t' `4 m% y, `2 i
reproduce
* S- O) X$ W6 s check-death
3 J5 j: @ I" ~3 C, U regrow-grass
1 v0 h; `. x2 X' z. t- j M do-plots
: M p+ }5 |( p$ nend
b) \9 L( T5 c7 s6 dto move-turtles
" j. b* m' N, o( K6 @ ask turtles [
! `* y9 H9 T7 Z8 V8 j right random 360
, l/ ^# s% Y( z6 l forward 17 b- w2 j* k1 n+ Y6 ]: ^
set energy energy - 1/ U5 v' T# C4 G2 n+ g( S0 Y! H/ u/ d
]
) c; \; e' e hend' |2 m3 K8 D3 {; D
to setup-patches
; ^0 E$ m8 k$ Y9 ]0 l ask patches [ set pcolor green ]
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to setup-turtles$ }+ W) O; ?- t7 g/ g" [) t
create-turtles 100
/ n8 W: k, A4 u4 ^8 w ask turtles [ setxy random-xcor random-ycor ]5 S: _& S/ B9 @0 }3 y! H' F' k- _6 w
end
- V) F4 Y8 W/ z wto eat-grass% W# b% Q& l8 y3 \* V t3 x' S
ask turtles [
( Q6 l. R2 O% z. c* l' K- i W6 r: X: Q if pcolor = green [1 w, R9 b- z* L
set pcolor black; }/ G/ g) K; s& f
set energy (energy + 10)
$ Y' l# |4 T2 J ]
2 ~ @/ ?6 D, r. ?; j% P ifelse show-energy?( @/ R# p- y9 m6 g
[ set label energy ]% Y% D) {; x D; \4 e
[ set label "" ]- c# V C3 f: F7 `+ ~' B
]
6 ~, x; @- q' A* P" `end) s x* S+ [- `* A6 d! P
to reproduce
, M1 k/ N Y5 m% [/ H ask turtles [
/ T9 c R3 g, C3 _7 ]3 C if energy > 50 [0 J* D* a$ N) l' ~3 ?
set energy energy - 50; _. A0 N1 e, [* T: Q/ k! f ]3 A
hatch 1 [ set energy 50 ]
9 h6 ^' Y3 z4 o8 J4 \) r ]
7 k \ X5 F' v ]( ^* w1 c, ^4 |6 }+ G0 K2 m0 y6 D
end0 e8 K' Q, i! S/ ~
to check-death
; H4 Y' D) H6 U3 @. }* d# b6 k ask turtles [( I, {4 O; g/ b2 i
if energy <= 0 [ die ]% f0 |5 ^. j; S8 y9 }1 }
]
# c1 [+ _* W( u# vend
- A& Y" d! k- |1 l9 Q, r7 Oto regrow-grass' W1 K- h1 U4 Y7 V6 y0 o& _
ask patches [
+ _3 E, p6 g8 _& p9 x if random 100 < 3 [ set pcolor green ]1 H- w- N7 }' u. G* @1 V
]# s: M2 H$ I {1 m
end
6 o9 }6 y4 J" P; Qto do-plots: S! o3 B) }* d" M; H/ h. g% E
set-current-plot "Totals"# {% n' j) l. q0 D6 a/ L0 t3 w
set-current-plot-pen "turtles"" Q/ ^( R2 `3 e
plot count turtles
* K+ l7 l, {9 c) N set-current-plot-pen "grass"
# G1 t7 x; c# e4 v4 O4 H: _! t plot count patches with [pcolor = green], @4 \ Z, B1 B4 c& `
end, D- P( D1 Z/ _$ n3 p5 g
可是运行时提示no such plot: "Totals"
/ H5 ` `" M$ M$ l" \) N, S, Herror while observer running SET-CURRENT-PLOT
( H- m6 H0 X8 z6 I. ^& J/ j called by procedure DO-PLOTS
1 N" i0 {/ h# Y5 `6 ~ j called by procedure SETUP
; R3 _; N! z2 L% \+ G5 o6 X, J6 | called by 按钮 'setup'
: k$ Y$ a" ~7 u4 E6 V求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
