我编的程序如下turtles-own [energy]1 G4 p* H3 s& B, z# E
to setup/ k% T3 k6 x& a0 _4 r
clear-all
$ D- T4 f \. k" G$ e, v" L2 S! ^ setup-patches
3 T4 Q0 U" q* S7 u create-turtles 100
m3 @, v- G4 u3 M2 u do-plots1 p; F% K" v4 h
ask turtles [ setxy random-xcor random-ycor ]6 [: ]: G$ Z" X2 n
end! |# B/ }$ D3 D7 G+ h1 x
to go
) _# N! w- d6 H move-turtles
* [) Q( E. A' ?' W6 F8 m' P. F eat-grass
( ]' L$ s. |7 Y reproduce
0 t) s1 J4 i7 ? check-death; e& m) n6 X) {; Y# e% }
regrow-grass# R2 z0 `) D8 j$ D+ r
do-plots' m/ B! l7 i' e- \+ X
end
' _9 q) @( B Cto move-turtles S3 F( }: g% a) c7 V7 u# o
ask turtles [$ h+ g7 P* S* F5 e$ L
right random 360
, z/ c: I1 i4 C% Y ~9 }7 R forward 1
( K6 j& r7 Q% Q( G; q9 @1 B set energy energy - 16 @( |( L+ l: Y& `6 v
]3 R3 l' K( ^- e- n+ ^
end3 t: W, q, N3 v6 `+ p C% @
to setup-patches
0 T, U* H2 j. h" } ask patches [ set pcolor green ]$ J: O. _ Q7 F! N1 X4 Z
end) s% R; j+ O. I
to setup-turtles6 B: _! X4 ]+ S+ o4 t8 x
create-turtles 100# F% z, G: [; z' c) M
ask turtles [ setxy random-xcor random-ycor ]0 ]# ^, E+ o% v$ [5 C% ` o; A
end
; w" t3 n' b1 W" `2 d3 p) J- hto eat-grass
1 u3 ~3 Z+ k% X/ \9 Q3 w5 C ask turtles [, ^ A4 S$ F/ c! B0 l# S: L
if pcolor = green [: `$ p& L* b4 l5 z4 ]+ i2 m
set pcolor black3 ~/ f% a3 h" V4 t# k4 \. X1 H+ O
set energy (energy + 10): T7 G' m. `4 H) B+ T5 M
]
8 m' A# w, s9 e ifelse show-energy?
q6 O# K6 a+ q. {, i& } _ [ set label energy ]
' s" ^% k$ a9 Z/ j [ set label "" ]
' j# B0 T4 z! e+ w/ a ]7 Z: N7 E3 b! j( B& Y, Z
end
! C7 J) k3 D5 I5 [4 @3 I$ W& hto reproduce
# _/ |* d4 k$ a% N u9 Z& r ask turtles [, a8 k- u7 W- Q9 \2 F6 M, F
if energy > 50 [
: n4 i% ?' E1 W8 i- V+ o) p set energy energy - 50
' f/ b% ]" H$ s) t hatch 1 [ set energy 50 ]" m. C% J/ U6 s" q+ c3 S
]
9 A8 w& [ T/ k. T: y3 {) ~, i ]
" u* u2 x6 {% send
+ j5 c* C1 P; b- ?8 N+ _to check-death
1 @% c; ` O' H9 w5 v! e. E1 I ask turtles [! E/ P5 p% Z% o5 v2 e) a6 C1 `; L' G
if energy <= 0 [ die ]
! k) U; |; o/ ~. Z1 T ]6 q# v. M5 }7 X7 [% t' S1 `
end
6 x4 W7 W8 j. c4 u# T9 a! h; `- |to regrow-grass k+ Z8 f! M) [6 a: F1 f8 }
ask patches [
- t( {1 ^* z5 E3 U) @$ K5 [! [" f if random 100 < 3 [ set pcolor green ]
* P/ I6 U- R: ^ Q! v ]
0 q0 }, z2 }7 e0 o8 Vend8 j$ X B6 I$ i7 N- [6 }9 ~
to do-plots M3 p }9 T% E/ t3 {% W
set-current-plot "Totals"
! s# X: ]* F' O0 M& l& B set-current-plot-pen "turtles"" B4 n3 W8 P3 {
plot count turtles) l# R9 k- [! G6 j1 S' W
set-current-plot-pen "grass"$ t* N+ v, O( M7 J
plot count patches with [pcolor = green]: l& b* v' ], r% V" v
end
/ N- W, h. X) H7 i, G4 V2 [可是运行时提示no such plot: "Totals"
. x }$ u& J; ]: ~" J, _error while observer running SET-CURRENT-PLOT
5 C' o5 O1 b$ B/ Q# k( D I called by procedure DO-PLOTS" w7 n) G- r, I7 C7 H2 @4 r
called by procedure SETUP% N( E5 j4 ]0 T8 ` S
called by 按钮 'setup'0 _0 S [$ X, e
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
