我编的程序如下turtles-own [energy]1 Z. i9 `5 O, ~* }# a' w
to setup
0 l, [# ?0 |; s clear-all( N) f2 ~8 _; s8 B9 d* @7 ^, r
setup-patches6 u* b6 U+ \; a3 l9 F* ~
create-turtles 1004 ]: z( u4 Q1 d0 f3 q& f5 T! i- O- z
do-plots y+ W0 @+ i( p# Y$ q+ c6 I/ } N/ r
ask turtles [ setxy random-xcor random-ycor ]/ ~6 L0 R! h" b3 K. `& U% B* P
end
( _; K% T. L: X: Y2 @to go0 j8 S e. g7 ^7 g+ l: R% g# ~
move-turtles: e- w- ~1 L2 j: D: }6 N+ h/ V
eat-grass4 O# H2 q% ?' A! V
reproduce3 p# D6 [# N, V# S1 v0 R# g
check-death5 z8 T; p, `9 `7 P. j
regrow-grass
" _" o; J3 K) Q: _: \3 W: T do-plots
0 X4 O& h9 z w' k$ [2 U% Eend# U- P, B+ q( g
to move-turtles5 M- r( I* W# {5 S6 [% {0 G) D. a; o
ask turtles [% l$ |7 f$ E4 } G
right random 360" G/ q! s% \# Y+ M, S6 K" g, N+ E
forward 1, n+ `$ _/ l) i
set energy energy - 1
% r0 V; I; h2 Z t7 o1 k ]
5 C" ^3 L* ~* D( Z' {& U/ k7 ^( Qend; i& }+ N! l d5 X" B3 g# C
to setup-patches' N9 P. C* e1 k2 M5 d: T
ask patches [ set pcolor green ] p' i6 J I& h# O
end3 X+ \4 q0 d* T, ~
to setup-turtles9 E, g9 I; o( L; c6 p7 O+ A
create-turtles 100
' [1 J5 M) f. I; }# M8 G ask turtles [ setxy random-xcor random-ycor ]8 x( {# a* y6 w4 Z# x. T& ~/ T
end0 J6 I4 i; t2 s! a
to eat-grass
c' p! ~' D2 Y2 _ ask turtles [
, h) \! J- B1 Z+ f# W; A6 l$ E if pcolor = green [ O) [7 B: A' P& c2 f- {
set pcolor black1 Q7 t8 f: R, t; t% g6 o
set energy (energy + 10)! m0 u- N" [7 p% L$ \
]
' c* L! I% P E% e+ @ ifelse show-energy?) q' `4 s, c( E) k& B- K
[ set label energy ]
$ e; v* e6 N7 b0 F [ set label "" ]$ b/ `$ J0 X- |1 p. k
]
+ \! R# u" U: W/ U9 [! rend
) A) q7 i' \$ M) {8 m* vto reproduce1 @% }2 m* p8 a7 `! [+ v& g
ask turtles [+ g( O i! M& `. h# m( m
if energy > 50 [1 L, D8 k' x% d" e- o. O y
set energy energy - 50' g {( I0 v( Q/ u4 f
hatch 1 [ set energy 50 ]
& N3 k$ L1 N! F+ c" r0 ?0 d ]' y, Z* K- j9 j3 |0 D, i- t
]
Y; i/ I7 _' n, G: |end
1 P/ w2 j# A0 c1 n+ `* O: `. @to check-death8 x9 N- w) \5 R& ~) R* J, l# e4 P
ask turtles [
" w) O L5 Z- N: w' W. r: k% D if energy <= 0 [ die ]. B) j9 L# {0 C: `" S8 r
]7 S* p5 {7 n, V: ?; c, I7 K
end
, C! T' r# g- X/ g+ hto regrow-grass$ `. F/ _ F* z( ~$ }+ H, n6 B B
ask patches [0 m$ L6 h( j S& v% g
if random 100 < 3 [ set pcolor green ]
9 u* M7 F* v/ y1 p! i* ` ]9 d% o/ N; M* B7 t( O2 k' n$ r3 r
end
, O* B* U9 P/ |( ?4 N6 @to do-plots5 X) A% ?" N# `- z4 O& d
set-current-plot "Totals"% ]! i- J# f7 y; b0 U5 o
set-current-plot-pen "turtles"2 l+ f& l1 C- R% A+ F$ V) {, _6 O
plot count turtles
$ @( R4 e% z, m2 a, u9 U0 Q& E/ i set-current-plot-pen "grass"
6 L/ h; @. x; n$ d2 u5 R$ }2 k plot count patches with [pcolor = green]4 S9 r X3 B! ]: D
end- ^8 ^; \( j, x5 l2 |
可是运行时提示no such plot: "Totals"6 q9 i1 Y- j5 n* T* ~
error while observer running SET-CURRENT-PLOT
3 e6 [; x9 \( b( W called by procedure DO-PLOTS
( _9 l, f3 @7 ^5 ?5 _$ B3 h called by procedure SETUP- D7 \9 E* q5 y' k3 q6 J" `
called by 按钮 'setup'
# C. q$ Z& o4 [( a求大神解答啊 |