我编的程序如下turtles-own [energy]
6 y" B' [- v# N, vto setup1 h) v- B2 [5 J/ U
clear-all) q* K- d: I- W( J) K/ U' z; h
setup-patches
' J; d( P3 V/ O; y& `# V$ Q' s create-turtles 100" S& E' V! P6 V$ X
do-plots1 J" z; |. Y- z- l |! E
ask turtles [ setxy random-xcor random-ycor ]
7 X: ?5 ]! t, R/ \, o( o3 eend* h# u3 ~2 m! J* W
to go
2 [6 k* [$ Z1 _3 O move-turtles" ]" T% u5 i+ j6 n2 R
eat-grass% o, [$ m1 h, ~4 F
reproduce# S h" Z4 ?, R: D$ Q
check-death) X$ m4 W+ @' n4 l, W
regrow-grass* t6 |: K5 u5 J/ {
do-plots
4 O* [( T) C+ J H( L. iend
& c* [5 }% J& l! Dto move-turtles) S5 _6 Q; ?2 d% e" p
ask turtles [" v5 }) C* N# {! j: ?8 D3 K% V
right random 360$ c# N6 i# E+ ]& D4 r5 `
forward 1
1 u9 Y4 p9 D4 h! v/ H set energy energy - 1
1 u. a% O7 j9 `3 h8 t- ~ ]0 p: {" z/ {/ P9 M: s
end( _- X: p4 l4 s' ]6 M8 e
to setup-patches
' s& [5 V! S* n9 s ask patches [ set pcolor green ] r' O* | L9 T1 ~. C
end% x. |8 I5 v, I0 K
to setup-turtles8 I1 I; W) T! v: L
create-turtles 100
4 E. E7 P7 X' o7 K$ u: [$ x4 H ask turtles [ setxy random-xcor random-ycor ]% _7 P) r/ V' |, k# }, i" M8 }
end& j! e1 K! {9 I8 I
to eat-grass9 B1 m+ |6 j* w# Q
ask turtles [- i2 q# E7 h& D- F" |& @: l
if pcolor = green [
5 ^ ]) r6 t. d7 u1 @) w set pcolor black! ~$ S, P0 [3 }) @" B# o. h
set energy (energy + 10)! ` v5 b# @7 X+ ~; E/ X
]
6 `. F5 ]2 r+ o5 f ifelse show-energy?: q7 ]& f: Q$ v5 x2 x
[ set label energy ]
7 R+ g x/ i" N8 _/ Q9 |7 ~ [ set label "" ]
& Z, Z0 w2 L/ W5 U7 S ]
|* F9 v* n3 B. g8 f! Jend
4 E! J9 W+ @1 t O( rto reproduce
* _, F) V r$ m: E1 E ask turtles [; o) u) ?% V0 |' Z
if energy > 50 [
) N/ n" n5 `; i, \, C0 _' c" K set energy energy - 50
1 u) T% A' q$ H! O1 {1 h2 [0 ?; A' l hatch 1 [ set energy 50 ]
0 b" J8 d, Y( ]$ r$ D" ` ]
4 ]& F7 D J( f& ^0 M, e ]4 }4 u% F; Q& M: C- q0 H. o
end
* u$ `: ~- v$ O; s5 kto check-death
9 ?0 ~. c' @3 s0 w$ J3 E3 I ask turtles [
3 Q4 i4 ~' r4 F; P3 x if energy <= 0 [ die ]
4 A: H, q* h. R: q1 G ] D! R4 Y! r6 s8 ]
end
: W E' F9 q8 R+ `3 ]- lto regrow-grass: }) o2 A$ h, j0 j% P, C; ^
ask patches [
' X1 ~' k5 ^: J* F2 L if random 100 < 3 [ set pcolor green ]: U8 V. R# [1 l" c
]
' N+ v, [$ D: s, k% S" Bend
" A$ t) b: h5 E$ D) rto do-plots: t* g# v: _, l9 v6 T# |- K6 i
set-current-plot "Totals"# z6 G L0 b8 X" y) A4 A4 O9 ~0 y
set-current-plot-pen "turtles"
" r6 ^8 R. S5 r4 x$ u2 K/ p0 N* H- k3 W plot count turtles
2 b9 [/ P; j7 y+ K) J set-current-plot-pen "grass"
6 b3 E5 J, [: x0 S1 T2 | plot count patches with [pcolor = green]' ^$ {7 y' g+ }% k2 o& K& s6 D
end, o5 m! O+ W" o5 C* N
可是运行时提示no such plot: "Totals"
7 j) X4 d ^6 M! kerror while observer running SET-CURRENT-PLOT2 e; @; j1 }! _. Y/ Y& `
called by procedure DO-PLOTS- \: c: g4 H0 Q! b, p$ e
called by procedure SETUP
5 K/ R# X1 K, g$ [5 ?( e* t; _$ n' C called by 按钮 'setup'
; t5 I0 X3 K. B" y5 T$ b6 G5 E求大神解答啊 |