我编的程序如下turtles-own [energy]9 G6 f. _$ [, }* ~" }* ~4 u
to setup; K! b! S4 ^3 K% D" Z9 w- A6 j
clear-all
$ w9 j" D: {' x7 r$ A9 f) v, F setup-patches" j, |, J$ ?& J5 E; T' i% ^
create-turtles 100
# n" H( L& t! n" X2 L; [2 ^( P) P do-plots5 Y8 f& i; E. F, K
ask turtles [ setxy random-xcor random-ycor ]
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to go
' d e: {) O5 I' z0 z* S' T. z; d3 T move-turtles
: L8 }- i% p) U7 Y eat-grass) L R8 L9 e$ e$ M
reproduce
3 g" i+ y4 S; |: t Q check-death4 U2 B/ [8 R" N( ^1 s
regrow-grass: Y* J" t; a! m, ]+ c8 \& H E" [/ j
do-plots
5 H% E# q; k4 I N$ ]0 A5 d3 w) A5 ^end
+ S9 T+ W+ L% Y7 nto move-turtles- W/ h- e o' `* d& w
ask turtles [' ], `. X, H& V3 r
right random 360
. {6 G8 V3 \* m$ a8 T forward 1
5 H% x; o4 h% e+ t5 b' [ set energy energy - 1
9 @, e' [( O* i# d& m ]
9 X/ {# w" T' e. Z; r6 c( G' lend" X) M; V( S; }+ N5 b
to setup-patches7 u# x1 U0 J: J6 b
ask patches [ set pcolor green ]
8 n$ V/ L( _; s* mend( m, m8 i3 Y' q* E7 q- N" ? l
to setup-turtles. M" g. \9 H/ y1 [- ]+ I
create-turtles 100
; s* C: O6 J: [8 {5 A ask turtles [ setxy random-xcor random-ycor ]" L" S( p9 L) ^0 K: W
end: a/ f3 F J% j
to eat-grass" I/ X; Q2 A) i( i D8 Q
ask turtles [: q+ G, [; q# u& H& n/ |
if pcolor = green [6 u. I. m7 N! v; q# O O
set pcolor black
0 q2 r: Y8 g* |: n8 B set energy (energy + 10)6 t2 D5 o& @' {8 b: @
]7 c' s" L; f# F, o+ B) J1 F w
ifelse show-energy?
2 O8 Q* S* a6 Q2 }& g8 S [ set label energy ]9 e- h: e& @* @) a0 G# d I& [+ O
[ set label "" ]
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( u. Z1 u$ L- Q" qend
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ask turtles [
+ o/ p4 |5 {/ M3 ` if energy > 50 [4 i9 l4 c' b' Q: ~1 [: I2 }
set energy energy - 50% c& J- q" b4 z4 t( {5 A
hatch 1 [ set energy 50 ]
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end/ G1 f9 m7 b4 `3 B2 R' J$ Z
to check-death
9 n8 l; ~: M1 S6 q ask turtles [
9 ^! K, ~+ X. ~! f7 q( S if energy <= 0 [ die ]" J7 j1 p# P, R0 U4 P+ A' n
]+ e4 c- t% G' U1 |0 R
end
4 M% F! x+ X3 k) m* Eto regrow-grass
! ?6 F1 D; F) c R' a" d6 x ask patches [' C/ m+ ~: O& s" n, g
if random 100 < 3 [ set pcolor green ]
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end
8 T" h( n1 G; f( O5 N, Cto do-plots6 W- |2 y% K# X/ Y, a/ P
set-current-plot "Totals"
! y1 z( H1 W# {% f$ w; K set-current-plot-pen "turtles"
7 z7 Z" r% g( i3 [. u6 Z |9 M plot count turtles
8 K5 K- v1 V3 u# ^0 I6 O set-current-plot-pen "grass"- b. t8 g0 r8 Q$ ]( V B7 q* l
plot count patches with [pcolor = green]/ m" y9 g! ]6 S; H+ u- y% r/ h
end: P/ k0 @0 I: m+ A( \" ~
可是运行时提示no such plot: "Totals"
& w1 J; \3 _# G' S6 T. Herror while observer running SET-CURRENT-PLOT
% S5 ~, |/ y0 H9 ` Q2 U called by procedure DO-PLOTS0 r9 _; N1 C+ g# \$ O8 R
called by procedure SETUP
/ b% l3 z) J6 E. y2 U# A called by 按钮 'setup'
" J% [, r' W1 U8 `. T& S) q求大神解答啊 |