我编的程序如下turtles-own [energy]# H$ j9 M5 j- ~; H
to setup
$ j/ T/ G A; g6 V clear-all9 g- D7 t6 C1 L! X* R8 f2 t( E" d
setup-patches* x; U) ?6 X1 F0 M/ i( m/ S7 P
create-turtles 100. R1 H2 ]! W$ T4 P* [& B: F4 j
do-plots, {9 v( A4 H1 ^
ask turtles [ setxy random-xcor random-ycor ]
* q! w( s2 p/ ]6 z" o, A1 Jend
/ R3 K' u) P4 y: N7 mto go, r: a) i) G# a3 \ F5 X/ A
move-turtles c# K* A: l- }* ~2 y
eat-grass
4 N9 \4 @$ x% c/ F# T reproduce
8 v+ s* ~4 S8 s) R; a' B check-death
5 M6 y- `. J; d0 V; H regrow-grass
$ H2 |$ F; L5 J% E8 T do-plots% ~5 F2 g Y0 H$ K8 l
end
3 J7 A$ q* S4 i+ y; l+ Fto move-turtles5 ~: o$ e1 S3 [% p4 r9 f
ask turtles [
$ ?9 |2 w D. _# x9 g" p0 Z right random 360
7 r, P, ^2 `3 S$ t forward 1
; ]! W+ l( f4 t0 Q0 t set energy energy - 1' v j4 t( [2 t7 A& L' w. {$ G
]: h+ U/ F4 c3 k0 s: c
end
0 U9 S0 y W/ g2 `- R( u) wto setup-patches
9 R+ a' u# k3 t ask patches [ set pcolor green ]
: ~3 e! Z Y. A& r1 Lend
+ Y8 z, \) W' a, B kto setup-turtles& g. i3 O) E! I: h
create-turtles 100* _4 y2 I" V: o
ask turtles [ setxy random-xcor random-ycor ]
! n$ r0 c' T2 [end
6 W c$ `% ^$ _to eat-grass" B$ Y# u4 Q. L6 z- \
ask turtles [
. `! S* g7 x# ?4 n; ~" F: [3 c* z! K' K if pcolor = green [; q# Z0 I! C: N+ Y# `" \
set pcolor black
( _' b1 a7 a5 {# N: w: G set energy (energy + 10): T* t5 a( g8 _. q; P8 v- S- q- R
]
- O* G+ d2 U* a2 | ifelse show-energy?
' S$ Y8 t- \+ b( C+ b4 z [ set label energy ]+ a7 t5 F: ^/ l- t
[ set label "" ]
( {% Y+ Q9 z C+ I8 d8 j ]* j3 ^& E2 f5 N9 K/ g' g
end
$ `, z" n5 K/ u! o# L: [$ Gto reproduce
; ?5 [- {3 y2 @ ask turtles [
, j- n9 U2 g' v9 R+ z! ?; r# M if energy > 50 [
. s: {) V3 S5 ^$ I6 X9 u set energy energy - 50
: J' |5 Y& X$ w1 o, u2 k. U hatch 1 [ set energy 50 ]' y/ }+ M6 L! O3 w
]( L. `( h9 T! T
]- k) j3 P6 O% C' E; ]2 g
end- E+ I6 F: r+ ?; R7 W
to check-death& U1 K9 @, P+ n3 u( o
ask turtles [
! L& e9 G) i" v' W8 \# x2 t9 v if energy <= 0 [ die ], x/ C# P* m5 v: m) {8 K8 A! n
]
, g& i' `+ ?* jend! y! o5 v: W; C3 V' Y6 S
to regrow-grass2 B& F: j2 ^; ^4 m' ?
ask patches [
+ g2 r' ~3 p/ a/ h) u3 G# W6 Q) `3 J if random 100 < 3 [ set pcolor green ]* k" @& B H7 c [3 F
]
9 Y0 f& Z, U# _/ z9 G1 Dend8 a" p. T8 |* e
to do-plots
" e* v& ?0 w0 E, ^7 @5 w set-current-plot "Totals"6 h) G' t, T; t9 B, o2 H4 w
set-current-plot-pen "turtles"9 ~* ~' j) r" L! |7 {& U" ?
plot count turtles
! S9 P2 {3 O/ d( h8 |. v set-current-plot-pen "grass"
! `1 |5 }+ }, _6 b* U, r plot count patches with [pcolor = green]
" n5 k! j" p c1 zend
! Z5 w' I0 Q6 E M% w可是运行时提示no such plot: "Totals"( R. o, Z4 `; n- C) X; a9 X
error while observer running SET-CURRENT-PLOT
) Y% Y2 Z; b/ O7 d7 ~* P& x called by procedure DO-PLOTS- A9 H: W' K, a1 y- U3 O/ ]! e8 l* U
called by procedure SETUP0 H7 ^5 h! f2 K0 Y! b" U
called by 按钮 'setup'+ I- C T) O' e5 s" n. l$ t4 k
求大神解答啊 |