我编的程序如下turtles-own [energy]
! }5 G( u7 Z3 v. ?9 _! zto setup
+ @% H& j# a( j8 h clear-all; a4 B# N3 q I, r% Z% e- y
setup-patches2 O3 ^: u* p5 z
create-turtles 100$ X! c% g. e8 j- `
do-plots
+ U) s9 r4 {. y6 l3 b ask turtles [ setxy random-xcor random-ycor ]" f+ @+ M# ]' g$ m# a' R# v! u- e
end
1 K+ b2 N& B0 r7 H; n( D% i; \to go
! a1 B# S* b4 A" C# }5 H; y move-turtles
6 S. V# Q$ U }2 ~ eat-grass7 Q- V0 i1 X- f. g( N" C6 ^
reproduce; y5 R8 T, T$ z1 k1 \$ R. c$ x
check-death
2 E6 m W8 r: @# n3 G5 s9 [: T regrow-grass" w* ]; c/ |, a5 f/ A/ l! ?
do-plots/ N5 M, N/ T$ I
end* _/ m- g4 y) w9 ?
to move-turtles. Z3 k6 w$ I; r# D/ [
ask turtles [
; j9 b1 v5 H; H5 {2 j1 j g6 v right random 360
( M# I1 ? i" s* M% ^ forward 1. P( {; ]2 L. U$ ^: j; ~; d0 n
set energy energy - 1
7 v2 [6 Y8 K' X8 N, b# ?+ B ]( X: |2 y+ E: c- X
end
2 C/ @4 [8 F2 p6 C# t1 @to setup-patches
( b t5 |1 A4 p2 h# n1 P1 J ask patches [ set pcolor green ]
/ [! v& k) a: F( E4 [' Mend* C; t/ l9 c/ c, R+ \9 g
to setup-turtles
& |% Q% G$ b% X* \* n2 ` M create-turtles 100& q/ R0 \1 m% u" e
ask turtles [ setxy random-xcor random-ycor ]
* {4 o/ V8 V0 g9 B- F2 z/ iend5 v+ Z7 t# G8 h L, Y' G2 v
to eat-grass
6 v% a( q8 H' P! u ask turtles [
1 q6 ]: ~, |" j: S" y if pcolor = green [! x' B5 A; a, B, J6 w
set pcolor black1 H7 N) Q0 ?# ^6 x n& A- X1 p0 ^
set energy (energy + 10)" h, N$ @ u* C8 i% Q" F
]
* [5 F. C! G2 z0 F t ifelse show-energy?
, M$ S+ Y7 }9 V* o [ set label energy ]) h% @1 w$ Z* V" o, _$ h a; a7 J
[ set label "" ]0 U4 z; l7 ]; l' i" S, f
]; o$ @: W# b, `& X# m3 Q) I, q9 o2 w* q
end: C, D" r2 I3 [& k' F# d( _1 o) W7 a
to reproduce
- m0 j2 j! K+ Q4 W# J1 @3 G ask turtles [
" u/ w9 D1 [$ M# q if energy > 50 [9 `6 ?) X. u0 @. Y
set energy energy - 50
& |* L* U6 D6 s& |! {) G hatch 1 [ set energy 50 ]2 [2 ~9 a; V' z) ` p% z/ R
]
. a7 t9 T# m5 y; ` ]
_ w8 K/ o4 H# i4 z: B7 pend
$ c/ h, V F% u7 @8 ^( Tto check-death
; V+ V& P( R2 ?5 @ ask turtles [: v* G) s' F" X& O9 `% o
if energy <= 0 [ die ]
7 z* \. i# S+ W8 X6 q. } ]
- n' a9 ?1 s* e% B% g( N6 pend
, ?( g4 Z' ~( J1 M3 Gto regrow-grass4 G. O k: s* e' F
ask patches [3 @' G8 y3 i8 u2 F. L2 u9 Y
if random 100 < 3 [ set pcolor green ]
! [ l1 O; b; K% L ]0 @: a0 X$ \' p" H! L
end
7 C/ B* O1 n. [) o$ [' y8 J2 M# P, ^to do-plots
6 \, x2 n- K' I- Z# q- h7 d set-current-plot "Totals"
* P8 V( S4 Y+ O( { set-current-plot-pen "turtles"
5 S; f" O0 p+ X0 y plot count turtles
- d# B! Z( G1 ^! a3 h1 {3 ~3 P set-current-plot-pen "grass"! }. v- B" r8 _' B$ z+ ^ s
plot count patches with [pcolor = green]
$ f+ s5 H: {3 J; J1 F$ b* ^; v; lend
+ g) g! p, `$ `可是运行时提示no such plot: "Totals"
- E+ w4 U C* \" X+ z3 D! {8 Gerror while observer running SET-CURRENT-PLOT
; j! E# S o& Q" Y' Q% n: i7 z D called by procedure DO-PLOTS
+ ^- {7 n1 a( r# S" U( _9 y called by procedure SETUP
- u* S9 x0 N( w5 d/ U called by 按钮 'setup'
& F$ m( D7 B+ z$ _1 z求大神解答啊 |