我编的程序如下turtles-own [energy]
- ~# d1 i: u+ q \: fto setup- U0 a% ~& d/ w3 U$ g
clear-all2 m3 O: R! R+ C3 Y
setup-patches& l# t0 x2 \0 y& ?; m3 b
create-turtles 100
) j3 D$ O A4 ~; f do-plots
% [2 H* k) ]% b6 x- r ask turtles [ setxy random-xcor random-ycor ]& O @ `4 c* j4 D3 _" I0 n: j0 u- V
end
0 a# n3 A" L% X" Z5 B/ H, T- ~, Oto go
& H0 u @% o5 t# j" P# a, o7 n move-turtles
3 `- Q' Y' v' X, |8 ^& e, W1 {% { eat-grass
) ]( f8 M5 N( |" j2 m6 l* l2 T reproduce
5 |( e* l' g! [# w* C. O check-death4 @5 r9 g( l9 ^: s) ]% _7 p! Y3 C
regrow-grass
' U% x) z1 t% O/ g3 x1 s/ C$ W/ z do-plots9 b4 G4 O$ |; [( t. s$ _ R
end
4 ^" D8 H; f. a4 ^2 kto move-turtles
% R @) e5 y3 L9 G( ? ask turtles [- Q6 u* A& L+ g( d+ Q
right random 360; _: r% ?# o- j: }0 {0 H6 i5 M
forward 1
' [$ b, q' }7 A K1 e3 d( h set energy energy - 1
4 C# W4 S+ D$ D7 Y ]
7 [4 Q/ O3 K1 H! ~$ Tend
* o' \( A0 f. `0 v: X7 \: ^" Vto setup-patches
: o, J! O$ e" F( b& O( ~( W ask patches [ set pcolor green ]
$ {/ Z! |% [0 ^! O: t5 G# Uend
; V; |( l" h' P I, Oto setup-turtles8 p) A& W! K- X R
create-turtles 100
& I# s& B0 U% i' y t; b+ c" ` ask turtles [ setxy random-xcor random-ycor ], E. H* J4 F- Y I
end9 Z/ v9 l) Z$ a
to eat-grass
: u! l1 A6 R/ e# u. D ask turtles [$ l' [1 N6 L! `! I$ g! V2 ?
if pcolor = green [& ]/ Y9 v! y. _
set pcolor black( B q% H5 A4 V. q+ g
set energy (energy + 10)) x! o- Z' l7 b0 Y: m1 t' s
]1 l9 P6 G( H* i0 P- ?& _3 i
ifelse show-energy?- \1 j) G+ t1 m0 r
[ set label energy ]8 ?5 K+ B6 A4 M3 ~+ B$ @ \# P+ Z
[ set label "" ]
1 z" B7 ^$ x: |( j- @4 M# n0 P; O ]
5 m& E! e' D% send
8 f3 U8 {( }8 pto reproduce. ^( Q: B7 T D3 F0 \
ask turtles [
3 j3 z7 ]' N7 h/ }4 {- Q; o if energy > 50 [- y# i- b. Z( ^6 m& T+ ~+ T. J, P
set energy energy - 50
3 ]* _7 g$ p# Y3 d2 D: \" {9 t hatch 1 [ set energy 50 ]: q9 ^& q+ B5 A* p3 U1 N
]
% \( O3 j, n( P, k6 X) x ] N/ ^# [ N# H, f3 g) Y, g# G
end
2 b! V- l# y* m' _2 Vto check-death
2 h7 C5 w" w. ^7 n( \' O; y* ` ask turtles [" D, V( h. P. B5 B1 I9 G7 R
if energy <= 0 [ die ]
' {* h" b9 c/ S; | ]$ C$ a7 ^2 G7 z9 ^- p
end
# |( X# u7 B/ M# ^) E" Tto regrow-grass, w4 H7 M. S2 f; G# x4 f3 x# K
ask patches [
1 ?& E4 n0 ~* b0 l9 @9 I if random 100 < 3 [ set pcolor green ]/ h6 e2 W$ g5 {! J {! E
]0 Y) J! p F% i( O; t# L0 S7 }
end
2 l8 W) j) K$ B: Fto do-plots
2 u& n) a8 I, W" g# u! h% h6 q set-current-plot "Totals"* @: f1 K, P2 q9 t u" S, z5 @
set-current-plot-pen "turtles"
9 ]+ S# Y* i9 z1 o8 ^( ? plot count turtles' T! ]# h7 _4 W% n6 x' j1 X& ?
set-current-plot-pen "grass"; y7 b9 H0 ?4 Q: x
plot count patches with [pcolor = green]; Y/ V( I. C/ K, x! @
end$ ]6 O) D, [- w1 t" q
可是运行时提示no such plot: "Totals"
; u* T% p: m9 Berror while observer running SET-CURRENT-PLOT
2 B$ c5 E& J9 Q called by procedure DO-PLOTS9 ~& Z! Z H% b3 r# L2 d1 U
called by procedure SETUP
- Z/ Z2 Y% N3 X" { called by 按钮 'setup'# d7 |6 G) B' J- k/ b F
求大神解答啊 |