我编的程序如下turtles-own [energy]
0 q( b$ G$ `" A1 l: H! p( ]to setup& Y1 h( n' F& c2 \( P- q# s9 ?+ T
clear-all
1 F# b" @8 H. M: i' e setup-patches$ n$ b8 a/ f- A* F
create-turtles 1008 z) A3 ?" H& w& e# ?" e
do-plots
/ W1 C1 n! Z3 D. {7 O ask turtles [ setxy random-xcor random-ycor ]
$ X9 _. u; t T1 cend% m; M- p; V3 g1 w, f+ Q9 m- ~8 P
to go
6 T$ E# U: q- H, S$ g; T move-turtles9 y! M6 B: ]7 c# ~! M9 O0 \
eat-grass
5 v9 N( @2 y. e8 R# ~$ b' b# _' M reproduce
% u" [: N9 [1 v4 T) v4 E check-death+ J- X, o3 T2 S3 X4 |5 x; X
regrow-grass
. {2 m) b3 B" x4 V0 {& B do-plots) x2 F" M5 a# ^! s- [
end
/ u: U/ a" W# hto move-turtles8 p+ |4 Z/ X! ]
ask turtles [
7 H# L0 f( A2 v$ {' u& u. B right random 360
8 e; Q1 {6 [* E! h6 c' G forward 1# Q% O4 G1 F4 o+ ]& s3 i
set energy energy - 1
$ F6 _* w! ?8 r3 A- s ]& X4 Y6 X) v7 ?
end
5 N, y* u9 x2 \4 `$ }to setup-patches* Z) C% t+ X0 E: O7 J% ?6 x5 O) z
ask patches [ set pcolor green ]' u; g$ ~0 h d5 |
end% m2 Q, M. X; r m. @
to setup-turtles
8 J- I% u4 N) {2 B& `* p3 c create-turtles 100
8 t' y% S- c2 g% S- R1 g ask turtles [ setxy random-xcor random-ycor ]
5 F. y1 x# ?2 s( Jend( I2 T3 {% K$ C
to eat-grass
: p) o. A" `0 D$ L$ p2 u4 L ask turtles [
8 N1 Y) K. U5 D4 F: B- { if pcolor = green [, B" k. _8 c* `: g
set pcolor black
5 M+ n, ~: {- X) p4 P set energy (energy + 10)# W& ^2 f$ W" H4 f
]
/ S1 `9 L& k3 R6 i0 S; V' e# J. b ifelse show-energy?
! H0 |7 B, B- m3 `% Z+ N [ set label energy ]
" q9 ~- |/ }3 @4 N/ g# H% ~ [ set label "" ]! g6 a# T! h1 t
]
: C/ A3 _1 \7 Y$ ?' pend( `1 n$ R( p9 s) q( M
to reproduce
% v% K9 F. R+ g: ~" h ask turtles [
" S2 ` s) |" n2 Y if energy > 50 [. w" h! j- w+ @) H
set energy energy - 500 W6 T6 S; E6 X' U
hatch 1 [ set energy 50 ]& `$ B! ]3 f* q( _. v+ n
]# j5 d: c; {- T
]2 g% e8 E7 h! \1 X U* h0 b
end6 ~, u+ u( S0 v' L p0 R+ Q
to check-death3 H/ f! F+ s1 a& }; X
ask turtles [
# ?: g) F: J' X" F# @& u3 H" p7 t2 u if energy <= 0 [ die ]
1 n5 X6 z: |* M0 E ]
0 P. Z& E! I: R6 j/ ~end) K5 `4 S# y% p0 a9 m; j
to regrow-grass
3 k* {6 S. F! x% T ask patches [
" z% h; ~; R6 j8 Y if random 100 < 3 [ set pcolor green ]
: |% u4 o0 w. [1 ] ]# i' r9 ^5 W. k! {3 q
end
4 C# U% `/ M3 T; H7 U3 s5 hto do-plots4 X8 @$ K0 P- G8 j9 y
set-current-plot "Totals"
/ p: W8 i3 H, `& ]0 w set-current-plot-pen "turtles"3 t- `3 K" x, s) x; T5 n8 Y
plot count turtles
z- o" ~8 \8 R7 K( Q0 l; L set-current-plot-pen "grass"
# u0 ~* p' O) d7 |2 ^6 [, p2 } plot count patches with [pcolor = green]& n5 z* ]# o1 J& Z, E T7 Z
end
% r7 f) O- T7 w' U; e3 l' R. h可是运行时提示no such plot: "Totals"6 U! A" B) P% d& h" i$ @& h7 k
error while observer running SET-CURRENT-PLOT
9 X q2 ?$ Y, B* b9 J7 _ [1 \' B called by procedure DO-PLOTS
7 H$ m4 K# S; ^, h2 G F; z called by procedure SETUP: D. }5 W" H9 H* k \
called by 按钮 'setup'
( I3 k6 s% W: P' u3 X9 o求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
