我编的程序如下turtles-own [energy]$ E4 X5 u4 ^8 R
to setup1 M2 ?; f/ v7 i% ~9 M) `0 e0 e
clear-all, i; k' B& B4 w
setup-patches
- ?, p/ [$ O+ P* H% T, h create-turtles 100
' ]4 K2 c5 k, x) c do-plots
$ r% H" O- |+ r ask turtles [ setxy random-xcor random-ycor ]& {( i4 l% @" H5 r
end
/ r; |& ~7 \- j% _- A( G# G0 Cto go
% W4 ]7 Z0 {! ?, d* [8 Y1 A: I2 U! z0 a move-turtles
8 Y* G2 o" [" u2 f! ^ eat-grass9 P. h$ q9 `* B' K2 M* z6 h
reproduce$ S: O+ a3 q( D& w' i: ~6 r% B* i
check-death
8 }8 V8 E- M Z regrow-grass6 J# ~2 R! S+ _: }2 ?0 l
do-plots
- W) K6 s$ Z8 n9 l( l5 Lend
/ a t: x' x! s. Z0 u8 pto move-turtles0 a; U/ a1 p! r0 x# F8 G9 }; h
ask turtles [
1 ?, {7 ?# o; @% N) z right random 360( O% K# {7 W2 y4 u( g& Y2 c6 w/ f
forward 1' B, F b8 _7 E6 z6 R' X
set energy energy - 1
* D* g) j$ m: x( l" e- J9 s F6 e ]( e# F. C% E) u- U4 X& |0 [$ }
end6 H8 ? |% F$ o1 R
to setup-patches. I$ x: e6 d$ k! }. z7 s( b7 _
ask patches [ set pcolor green ]- m3 K* q6 h6 I, ]: Y
end( t [) M+ j' K* C- }
to setup-turtles
7 W# D* s. p0 h( V9 w create-turtles 1002 r7 n/ T% ~. P9 F2 u) n- e
ask turtles [ setxy random-xcor random-ycor ]
! x( R- [3 V9 L6 q: Vend8 U; ]1 d$ v6 J0 l& S8 o
to eat-grass5 C b! U; j% X5 G: v8 \* F
ask turtles [
% K. g* }1 v5 J if pcolor = green [% ~3 x9 U" v5 } i
set pcolor black! u/ a ^# C% b2 z1 p% j
set energy (energy + 10)
6 c5 a" h# B8 v0 M) G- g& c ]3 l2 v# F! N/ H& m+ L' ]3 q! m
ifelse show-energy?& |# t2 n; d/ p; g: q) A& g
[ set label energy ]
1 |$ r6 `9 n4 f C [ set label "" ]
7 G& A3 ?( z7 E+ `# s6 q2 W0 T ]& f) V3 }* L" S" B( j: a
end
" ~& @0 H3 |9 _% }3 b) uto reproduce% @3 N7 ]& Z2 `( z
ask turtles [
- V# z. U$ D+ {( T1 ~- ^ if energy > 50 [& R% {1 L' c8 [
set energy energy - 50& S# D7 V+ H% H, ~6 V8 B
hatch 1 [ set energy 50 ]
$ t, E- H4 c% r ]
6 }, T5 ^1 A2 P. J4 R ]7 i* g8 D7 a5 f) U6 C
end
0 J/ ]' o# T0 y, i1 Vto check-death+ F0 r$ e) B4 R9 E8 v
ask turtles [) q j; e' i" n
if energy <= 0 [ die ]$ j. J$ @# v, Z k+ B
]
/ p y& s/ f6 p1 ?0 x* }# q8 t1 k1 pend
7 j; E( N0 n3 A( G& m4 C0 sto regrow-grass3 _4 A+ C; p8 F( R
ask patches [
% @' Z% O- K2 H if random 100 < 3 [ set pcolor green ], U) x. [9 K2 b' S8 t( o
]4 Z( M. t3 Q( j% S' E, ~
end
8 l" p6 y" x' G% [$ E% p9 Y/ z* ito do-plots
/ y* l5 I+ D F7 \9 o$ S# P4 [/ l1 [ set-current-plot "Totals"
# m% V3 B! }$ g7 ~1 R set-current-plot-pen "turtles"
9 h, [4 \! F$ i# S# q9 f) |# y( G plot count turtles. }8 c: d; b0 ~. f; e, F7 d3 S3 }
set-current-plot-pen "grass"! b% J; W0 Y4 O$ t
plot count patches with [pcolor = green]" q( i+ t/ F3 F1 X0 l1 `' |% j( B6 t
end5 `# `" ~' l$ ~2 o6 h
可是运行时提示no such plot: "Totals"
; {2 `1 z4 @, M% h3 A; Uerror while observer running SET-CURRENT-PLOT4 Q f6 E* Y& U, F0 G1 m, J& ^
called by procedure DO-PLOTS2 j) c+ o, F5 o5 `
called by procedure SETUP
. R8 B; X- @4 R# o E called by 按钮 'setup'- e4 V$ U2 @, n" E+ @
求大神解答啊 |