我编的程序如下turtles-own [energy]
& k( F. W2 R0 Sto setup9 X6 N4 j! W, `2 l5 B
clear-all
* P- \/ _- S3 O% o; i setup-patches3 w& x- E+ f' C- [; c" I6 r
create-turtles 100
$ T7 N" g4 U) {- r& @6 V do-plots
+ l8 ]3 t# f {5 L ask turtles [ setxy random-xcor random-ycor ]
2 A$ ]+ O2 u9 u) V3 q/ b$ i7 Oend
+ M1 c5 ?+ }* n4 V7 [' ?, z5 g" @to go
2 b* z7 H) A, H* m2 w move-turtles
0 R/ Z5 ]- \" ]9 B5 w eat-grass
+ y Z( |2 Z$ U8 T+ Y5 [) ] reproduce
8 t. A. \7 J) w6 T5 {- m4 p5 R. t check-death
: l* |( G. n/ S# b1 j7 P$ P6 o b" H3 j regrow-grass; G& I& i) ?5 {% P& {
do-plots: F5 L! J, l$ ^& n- B4 {% q
end
1 J; L2 m _. K0 `to move-turtles
0 e7 K( w5 Q! r2 Y ask turtles [
: i; x& ]0 ]" o2 X+ O8 {( K7 M$ C right random 360( x C, T4 Q' w6 ?+ f) A4 g
forward 1
; w A% d) Q8 Z; }- J set energy energy - 1
6 l" j" l3 t7 r* O ] ]
- a* m( z0 _' V1 V! p/ h$ hend2 o( u/ U9 n$ ^1 k
to setup-patches9 k; K# e) ]2 R) ?
ask patches [ set pcolor green ]" c5 G8 v9 \) n
end" L) @% R; k, @$ X& s
to setup-turtles3 k0 S! \: M% y0 d6 i+ \
create-turtles 100$ @5 ? C; K1 g/ d
ask turtles [ setxy random-xcor random-ycor ]
7 o8 o- M" ^9 Kend
+ [ f6 N x! s0 Y' b8 l- uto eat-grass
8 O1 Z T" ~$ C. e/ B% h2 l ask turtles [
; a; w( u9 f4 s( _, t; v7 `+ l8 N' E if pcolor = green [+ q- y3 E, a& I4 y+ { X0 l
set pcolor black: a4 b$ ^3 b. k" X- \
set energy (energy + 10)( D# {- P/ v5 k" K: K* x
]
' b& d: E2 f* h2 o ifelse show-energy?
. s7 d9 `% R$ _# R( }: P% m [ set label energy ]
P* ]2 [, w) U [ set label "" ]
6 u" }( {" }, j v ]( |1 A( V/ N7 j+ H
end# e/ O* O4 g9 s! `/ H9 G
to reproduce4 P* x# _7 E8 [4 s0 U9 ~' G
ask turtles [
' D; D9 }# W- W. g/ k+ g if energy > 50 [ A) g# L7 \, Z! h8 k: |
set energy energy - 50
1 A! C) q2 }# S7 j+ Q hatch 1 [ set energy 50 ]9 Y+ A5 ?1 e" ]9 s
]6 M9 a6 }5 \+ h. y
]
7 P4 M+ @6 S6 r1 @3 Z$ oend
; G0 H3 ^+ @# |to check-death1 ~% E' o. d# M( n& E# X2 f- `. H. ]
ask turtles [
( p- }2 w7 V. ?0 O% E1 b2 R if energy <= 0 [ die ]
6 R% _6 T& }/ w1 c8 e' i0 g6 X ]% D7 M4 S: t- N
end
3 C- |: ~ `4 z. n( o; h& kto regrow-grass
; _* M- ^2 @8 Y/ }9 ~) W0 `, k ask patches [! c1 |6 j7 o: m* O, q: o- j
if random 100 < 3 [ set pcolor green ]
1 ?* c F! O- N& A0 x" Y" @& u+ F0 ` ]
( w% C3 C8 _' J! E! x' zend$ J4 o6 \1 Q, e
to do-plots/ D. c c9 ^4 p% l
set-current-plot "Totals"3 ]+ ~5 t3 k: G; j$ f
set-current-plot-pen "turtles"
0 c( w* Z. L& y0 K. ?! E plot count turtles
7 N/ q3 ~) `: I B m: v set-current-plot-pen "grass"
* i: K u# u# m& p& G9 ~ plot count patches with [pcolor = green]" {3 h1 m$ d2 |# k5 B# Y) i* k: K
end/ x1 O0 ?- z9 @6 H5 H6 [
可是运行时提示no such plot: "Totals"/ _' [2 n- s( h3 u p
error while observer running SET-CURRENT-PLOT
5 _$ c! h. P! O5 p called by procedure DO-PLOTS
- `1 M7 s& A/ m$ T: f. w called by procedure SETUP
1 k0 f) x9 U4 c& i7 } called by 按钮 'setup'- d5 g+ |5 W6 E/ X4 F7 K0 ]
求大神解答啊 |