我编的程序如下turtles-own [energy]7 r; h: p+ a6 L4 M% }! m/ Y G
to setup* ~6 u4 H E0 `' w8 @
clear-all2 R: f$ L* s( \$ m
setup-patches: v- R. B/ _; m8 L( t7 ?, S' Q" J
create-turtles 100! F/ B! j& q- }! e6 F; G s9 C
do-plots0 w4 L" x* W# A p
ask turtles [ setxy random-xcor random-ycor ]. B) {& H/ x' H! O! s; g6 f
end+ o+ S8 ~, t, e3 j
to go
1 W8 {$ {7 G) n7 w" C: N U' A l) p move-turtles
7 J5 R) n; A' l% G eat-grass# ^7 E ]/ G( ]
reproduce
* l9 k: A& B; e! O: r0 k8 Q$ k2 x check-death3 p# c! s$ V0 S$ Q
regrow-grass4 \5 n# E f: P8 |/ w* J
do-plots
4 t; L* d) z3 l/ m, v4 cend: p" a7 z/ b# Z5 @( h% [% Q
to move-turtles) X( F4 ^# t. d
ask turtles [
9 t$ j/ w$ y0 E3 p q' Y right random 360
4 e' V% d( ]/ g. k; K forward 1
3 f/ X( U$ }6 ?2 p1 { set energy energy - 11 u! v5 R% J3 y0 V9 l
]
$ f3 }4 I& ~' t' ~$ v# h' {$ c7 {; Qend3 y; T+ C1 |9 r: K# W: j
to setup-patches
: _& r `8 @/ b& }! U: D ask patches [ set pcolor green ]
/ ?5 G6 {$ h( C- Jend
0 {$ A4 ?# r9 v$ ~1 bto setup-turtles
( ~ `& ^2 A9 d3 S r. [1 ]+ q7 c create-turtles 100. t+ ^6 F& I% e" l8 Q9 D" r7 L
ask turtles [ setxy random-xcor random-ycor ]
0 S3 ?3 @/ [- ~/ O& k# Kend2 y0 n7 E. D5 Z/ r1 h+ `! h: u
to eat-grass! Q+ g9 I0 `* c, j& z* \
ask turtles [) o) S( x: N3 O8 n3 T4 o3 ?& ~
if pcolor = green [) d; J7 v8 ?$ M& s _+ z: o
set pcolor black/ c" W G9 ?+ i" P2 r
set energy (energy + 10)$ ]2 C( i- G- q5 ?" A9 `
]
% ~! I) C) M* P* S! E v ifelse show-energy?# Q# X% Z* I7 o4 x9 z9 `
[ set label energy ]' ~& O9 {0 v% L- O: a) f C8 k! o
[ set label "" ]9 V6 C2 K! q1 y" y- f* W+ \7 ]5 z" T
]
8 @9 S; i, t; X( V" T0 e- G, Fend
X2 x( V X2 a* V+ Fto reproduce2 a8 ~! u% t4 G' f2 C, R
ask turtles [
0 [: D9 ?0 L, y$ t( R# k! C if energy > 50 [4 K3 J' D4 Y- O9 Z2 q- D- l5 L# I
set energy energy - 50
" j8 m2 \8 U5 S+ S hatch 1 [ set energy 50 ]5 _% t# [+ z' \
]
/ g7 O3 Z5 F! W/ l, J* Q! D ]
6 @% D- ^$ @6 m* L% a( @2 `" wend
% _& e1 X7 S* B; ?. Rto check-death
6 Y& M8 | v# r j, I' Z+ b ask turtles [
6 l$ d2 F0 ^, x' Z7 I" b, i if energy <= 0 [ die ]
( v- e3 s& {& o ]
6 x4 O% `/ o/ Q: M- M, z8 qend
( H" o2 e$ o2 v+ lto regrow-grass, n3 ~ U3 q& w8 X, O+ o0 }/ i
ask patches [) q% f* E5 \9 E/ ^: r5 L
if random 100 < 3 [ set pcolor green ]
u9 q& s' M& d' R, }) h6 Y; E% w ]( |8 ]1 U( {$ y% X7 c. H; A
end
9 z9 _# e' \5 u8 Ato do-plots2 L: m2 c3 B- z: I* u
set-current-plot "Totals"
, x3 {+ c5 \5 I& p4 b, `9 a set-current-plot-pen "turtles", [4 T+ d7 w& R# e, p
plot count turtles
; ~# U/ n( u+ u" g$ Z: v1 ~ set-current-plot-pen "grass"
/ A% h1 k8 i2 Q' I6 l: D8 l plot count patches with [pcolor = green]
# j# V0 L+ S, J5 B% _3 ~end5 j4 P& G# K6 S3 F
可是运行时提示no such plot: "Totals"2 m4 O6 J# |3 I- `2 @
error while observer running SET-CURRENT-PLOT) ^& y; E) `$ ]1 ]2 R
called by procedure DO-PLOTS$ H: n% Q3 J5 X$ n B$ S
called by procedure SETUP
, ^' i4 U4 j% c n# ^8 K' X3 Q! o called by 按钮 'setup'5 V* _( w4 {# B$ }$ p
求大神解答啊 |