我编的程序如下turtles-own [energy]/ }' q& f5 x# \9 P$ `; B
to setup
/ I7 A, n+ d0 J clear-all
& y; y: O: R3 \4 m7 X t setup-patches
2 P" n B, r$ e9 z' L: ` create-turtles 100
7 P1 H, C h% ^0 k$ I do-plots& N/ E2 z* N0 M/ g* n- ], X% _( E9 i
ask turtles [ setxy random-xcor random-ycor ] c; g* M9 b( v0 }! e
end2 ~2 i+ p. g6 `
to go: m* t9 e* {- T+ @- E$ @' D
move-turtles7 H& r& [6 u' K2 F; E0 ^2 _
eat-grass3 p5 ~6 k5 g1 w3 Y) |
reproduce
2 Y( Y+ Q+ z1 W6 H: X, K0 S check-death
) y; A9 ^5 E4 w/ V. r% C6 ^ regrow-grass6 {2 p: _5 W' ~. N
do-plots
8 w8 c# i9 r( e2 Z' O4 T, K, iend$ j9 v* Q7 F9 q0 B9 r
to move-turtles
( c8 P6 f3 H9 Q0 S ask turtles [. s" n; }: Z/ \) Q% L" B
right random 360" \" ~; r, a* ^$ `) c8 r% x
forward 1
* i; R. J& L5 @4 `% F: @ set energy energy - 1
9 P& a6 R% N0 P# T& ?; g j ]
: R: o7 }& g4 W8 Z+ O1 Fend1 v) z3 [2 C. g$ S' A2 {
to setup-patches7 V: s2 j6 E$ k- ^
ask patches [ set pcolor green ]; v @/ K. t& S u3 L
end
4 B2 _/ \* g/ |to setup-turtles- `2 Q* B. B2 f1 d. D. U
create-turtles 100
; [1 z4 Q" z# }. E ask turtles [ setxy random-xcor random-ycor ]: E- X/ ?% k8 X; r: F
end V/ S/ M9 ]% w0 h( f
to eat-grass% Z+ j8 O9 `4 T5 k% L m* U
ask turtles [
, C( p3 y9 w. o1 C2 ^6 X% E if pcolor = green [
, v+ J$ T, Z; v2 | b" X# E set pcolor black) r. K+ K- ~2 }4 u/ s# D- A5 X7 U
set energy (energy + 10)/ B0 t( O$ h) ?# I$ F' k4 H
]' c2 |0 w( i) R6 i' Q( G# X
ifelse show-energy?+ X! b N# F% }, e/ }
[ set label energy ]9 g0 r1 ^$ L- Q) j2 f) F: h
[ set label "" ]& P" t& D3 U4 N6 N) ~! i' s
]
6 H5 s5 B2 B. y! s% Y) tend
0 T% ]; U s9 z7 q8 zto reproduce5 Q( g" @) x% G. `* A, k
ask turtles [" h1 j2 i$ y0 j9 k$ l
if energy > 50 [
% A, h' `9 V# `9 x( W1 J9 U7 R5 ?7 Z set energy energy - 50
3 y J: d& N/ {2 X4 ? hatch 1 [ set energy 50 ]
9 b+ N1 n" @0 u6 J ]' _- _; p0 |' Q- ^8 ]( E: I
]
# c6 g3 j8 @: A) f9 G$ R8 wend5 H1 t2 ?0 s! Y% o$ T* r" ?1 S* B6 q
to check-death, z5 F& d/ p5 d- Q7 n( r: O9 {
ask turtles [
& z6 u% x. m, B- I if energy <= 0 [ die ]! a* `0 I" }, R6 P' O
]
7 F- e1 s8 I/ g' v/ D. I5 iend
) a* q9 ?/ V) eto regrow-grass8 t$ ?. S8 D7 F* p$ v
ask patches [( ^4 a, H- E- Q, C1 S" K2 A5 t( {
if random 100 < 3 [ set pcolor green ]
2 y" H5 u$ r5 _ ]
- k( s9 G) ?: vend" z# b9 }" b o' ^( P% B
to do-plots2 n$ C5 { d. j, E- ~
set-current-plot "Totals"8 m, x O; L x/ s% c
set-current-plot-pen "turtles"
2 v+ N& n4 i; x$ U& Q plot count turtles! N7 N4 B4 n( P" d, }6 B% ?
set-current-plot-pen "grass"
, C* B8 } T$ M2 M plot count patches with [pcolor = green]& T8 f' | K; [0 s+ c
end
) ^1 |' W) C& Q可是运行时提示no such plot: "Totals"+ t1 Q9 ?# b: f
error while observer running SET-CURRENT-PLOT
1 t7 t. {, b" q$ J4 x called by procedure DO-PLOTS+ t# \0 j$ L$ Q4 G0 E) i
called by procedure SETUP
) _7 {% N; q3 N* W6 z called by 按钮 'setup'
. w: F8 E* ^. ]/ ~" r2 a0 ]' F求大神解答啊 |