我编的程序如下turtles-own [energy]$ _6 p2 _2 q0 Y. T! q
to setup
% s/ P2 U/ k2 v9 Q U clear-all% _* g% f% _2 c! D4 E, b5 \# r
setup-patches' J2 ^: s' Z( k
create-turtles 100
4 k3 ^0 |. x9 L/ d1 f0 c do-plots
3 T/ `5 k# L1 I! M5 {7 m o ask turtles [ setxy random-xcor random-ycor ]
1 E9 e* i8 R. n# x" B# bend$ O4 s% q, O- ^. F" C) Q3 ?
to go
& y; b7 h$ p- S$ g. ` move-turtles. h9 g- l' P' S [% r
eat-grass
- a F4 G9 m7 x) W7 [ reproduce
& v9 ^: ~5 J A' B/ Z% h check-death
. F4 F3 N* w; R" k regrow-grass4 q+ m2 X7 c- o) Q! B* F
do-plots
" k) F" p7 H: x' Y8 t0 cend
# T( S# \: n" ^3 v, q- jto move-turtles% l% L7 G# y! ~1 L2 @! N
ask turtles [
4 x: _- V+ d- b3 c+ z3 M9 F right random 360
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set energy energy - 1/ {1 m) C& u1 d8 \3 R
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end
. C3 b8 D$ _- s/ _ D+ Q* P) d7 fto setup-patches' U* n; {. }+ D; S \/ u
ask patches [ set pcolor green ]
, e! `/ @4 K5 Uend
5 P) i( ?/ \. S5 h7 hto setup-turtles
+ S" C. G) f/ E2 [ create-turtles 1002 I1 K2 c: Q; ~
ask turtles [ setxy random-xcor random-ycor ]; o {- d& K1 t7 `& d/ `
end% F) \! i% [& h
to eat-grass3 \/ T% Z+ v* W8 e
ask turtles [
, \% H( t# R- \; ]0 j if pcolor = green [
( ~& Q0 ?. J; k- a8 ]. Y3 w set pcolor black; o: a& F' O& p4 H8 I& V
set energy (energy + 10)
1 a8 ~/ N9 H/ d9 Z- ? V0 d9 s ]
* o+ n0 e, q! H* c" r! m ifelse show-energy?! z- S8 I! F: N3 [$ I0 B) G1 J4 ]
[ set label energy ]
5 |& x! W# p& n8 P [ set label "" ]7 c: U& q& v! A4 ^7 A2 k( Q q; W. z
]
! M! w% X# q5 }& H0 zend' M( q$ y* j2 H! X) n, U, x0 u3 R
to reproduce
' i6 H( C& I6 u. Y5 ~ ask turtles [) n7 Q, S7 Z8 k
if energy > 50 [0 P. T$ H3 S/ b* M. P: E* v
set energy energy - 50
( |2 J( J2 L+ R! T5 {2 y' a8 u hatch 1 [ set energy 50 ]9 G4 g" L' `7 J! G! [/ z
]! a7 |* M- K; \5 |+ T, a# h( |
]
+ d& f2 K j0 ^6 N5 _) {; ]end; o/ l E# |/ }, q6 R) O7 n
to check-death
6 ?- T0 N. D* q' A! h; P ask turtles [$ _6 n+ y @ H* _9 @! S
if energy <= 0 [ die ]# v1 E5 i! f: L- ?, |( b0 w+ @: [- Y
]7 V) Q; }9 |: b; p, N1 r
end
9 q5 M, ?; d- y! \' |4 nto regrow-grass. {, n4 W& L( ?0 a( k
ask patches [- n& H, o3 O9 e
if random 100 < 3 [ set pcolor green ]3 v6 V' D5 N C( v2 z3 ^( k
]
4 R$ ?0 r$ W5 J+ U% send. H' z1 W; g' o$ K
to do-plots% f+ J7 n+ g+ b: J; ~
set-current-plot "Totals"
6 B0 u+ ^" Q" c& d) Q set-current-plot-pen "turtles"
7 f3 w; M! `% J1 C plot count turtles
; V2 V5 @2 \: W' m' @ ] _ k set-current-plot-pen "grass"0 j1 V. Y' h! W3 q8 X" D
plot count patches with [pcolor = green]( [6 B9 C4 o% D0 h
end
) M/ F6 v( Y* e0 o/ X* p可是运行时提示no such plot: "Totals": V( Q" a" g: Y1 Y
error while observer running SET-CURRENT-PLOT
9 S; J# b* h- R3 N4 |3 {9 s called by procedure DO-PLOTS: y( D! |+ W, R: k4 O
called by procedure SETUP6 h- T6 U( U; c6 r4 s
called by 按钮 'setup'
1 b4 H$ X3 @9 f7 D# o& t1 W' L求大神解答啊 |