我编的程序如下turtles-own [energy]/ w& w5 v6 B L
to setup
% p: y1 P3 b; f: @: w. _; h clear-all
8 `- \) k$ i, n setup-patches
- m. i2 U1 E) n7 t create-turtles 100 Z. O! ~! n& L
do-plots
: v& y$ W$ P& q* Y1 ?" K ask turtles [ setxy random-xcor random-ycor ]
3 [$ _9 g# ^) N$ O4 Q, aend3 o- o+ o& M0 E- p- Y5 R: n! H
to go. a# M" y! y X- F
move-turtles$ }8 e% ~- E2 f; {9 X; {
eat-grass
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check-death
8 d; C( z, G) u) k7 V1 |2 ?! |( I regrow-grass1 v- D2 V) n' \" t' l5 P
do-plots
1 N) z4 v& D, ]/ A! Eend
- R u2 v, T: J, ?2 cto move-turtles- k7 H: Q2 F' d- [
ask turtles [% l7 d# M1 s$ a
right random 360
% k( S9 M- ~5 I% m% [8 L# M* | forward 1$ o2 b; l) {7 Q* {
set energy energy - 1: a: W: Y# F; E) M7 q+ I8 _+ B
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end& F( }/ i* g1 F F
to setup-patches6 z0 C( A/ n3 V1 M
ask patches [ set pcolor green ]
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( N- q4 ~' t/ F+ I; p. }to setup-turtles0 M* A8 o! O! A" A7 M( {, M
create-turtles 100
+ v& M) b% G4 }) _5 H ask turtles [ setxy random-xcor random-ycor ], x% s" O/ j9 u
end9 E" A% K- N/ e+ F5 |
to eat-grass
' Z! A: s3 [8 v4 K5 l) s! P1 ^ ask turtles [
7 y& F' H+ `0 d( _% s! R7 Z) [ if pcolor = green [' D# p& `6 ?* X6 E
set pcolor black$ g4 z3 P9 B( A9 I
set energy (energy + 10)
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ifelse show-energy?8 G% q, m7 Z: p$ F2 R
[ set label energy ]
2 m7 c* U* a/ @: \ [ set label "" ]# {2 k2 d. n# a
]
' _1 u. W: u4 j$ f2 X- qend; R2 h: z" B# T" p8 v; D' j
to reproduce1 O' b5 l' f& c/ r
ask turtles [) S$ g* A& O- \( V
if energy > 50 [% A; [, g' b( E6 }. @* Y$ w |, M
set energy energy - 50
) M1 t- o Y7 U8 G0 ` hatch 1 [ set energy 50 ]; D1 C" `6 O% g+ q/ C
]
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end
8 n$ t0 w G0 M4 Q/ fto check-death2 x: p" t4 p" W5 w z0 @
ask turtles [: M# |5 Q$ G, e$ H* R7 ?0 v
if energy <= 0 [ die ]# L+ C; @1 }8 i1 N7 Z. r
]
3 B" `# F, f4 r2 X, Jend
; V9 l. g- R0 X2 T! ?to regrow-grass
1 A/ P( u2 o" }7 Y ask patches [
" ]4 L5 u- g( q3 f* J2 A6 K: A if random 100 < 3 [ set pcolor green ]& P1 q& @( r0 {. V& y
]7 h9 y! w; _5 p, q! R
end) _$ e* B/ x8 j3 C( Q' K, H
to do-plots# i0 s+ V0 x! Y# [( J
set-current-plot "Totals"
: }; Z4 n4 z7 j, B$ F set-current-plot-pen "turtles"( t8 S# l$ [6 M% J4 s* |
plot count turtles
2 B2 z& O* t9 H2 u: @ set-current-plot-pen "grass"
6 a3 _" A2 w8 j2 [9 a! W8 m plot count patches with [pcolor = green]8 y, Q* E7 y+ [1 k K* O
end
1 I _7 w: _) W9 {4 z/ \0 p可是运行时提示no such plot: "Totals"
7 Q' A9 e$ z, e4 L( H# q$ W& b9 Cerror while observer running SET-CURRENT-PLOT9 z8 B1 r. @7 O6 C* I4 |( |
called by procedure DO-PLOTS
# U& e% g" b$ ]9 n8 T called by procedure SETUP
e) B. ^1 l# q! z called by 按钮 'setup'/ n% i6 _) z0 i) R. F0 Q
求大神解答啊 |