我编的程序如下turtles-own [energy]9 {2 x: p2 Y8 f; N# n+ x/ [' L
to setup
' a- C" ^5 b+ f% c x Y' \ clear-all ]7 p% T4 T. C I
setup-patches
( W% l5 k, g/ _6 m2 O* H( b* Z create-turtles 100
" I* P6 _6 ^2 c% Z do-plots
4 s8 C+ k/ p7 r5 L: Y ask turtles [ setxy random-xcor random-ycor ]
3 v8 V$ b" }3 G8 E3 S! T% C ~end
5 X; j$ h! Q2 z4 u# \& yto go# r; K- t: c+ g2 U
move-turtles1 K( r8 \7 s- n# q6 }$ h9 y
eat-grass7 F" x$ { d; y4 E" [
reproduce
# G% d0 o ~9 Z check-death
- P8 {# p3 ?) G' C" a regrow-grass5 V! u. [) i2 r' N# I0 G
do-plots0 h& y( x4 K; W' ~
end3 e/ A7 J ~1 q% c9 i9 _$ }5 H
to move-turtles
$ x3 z7 n; H7 o2 m ask turtles [( l7 U- j" @9 z8 Q
right random 3604 K* h3 d4 w( s( |
forward 1
4 K: F) E8 w# z- y* T set energy energy - 1. m: u$ a, a% S* D
]" C& B. e& W. x7 d/ A7 U
end8 D9 k' W" H' t# R! X# ^
to setup-patches
# Y9 P- y4 ]3 `# T) |6 f5 f, D ask patches [ set pcolor green ]+ {/ y7 Z7 _, `
end* A) O S5 [ Z5 m m- ]
to setup-turtles
+ d& q# F$ Y1 N1 r6 w create-turtles 100+ L( R2 P4 Q# O. a
ask turtles [ setxy random-xcor random-ycor ]2 H6 b U0 c6 a# j! T/ z4 M
end
/ _& x6 U* l) Z9 i' Uto eat-grass
% {2 a: f. N$ N1 E; K6 A- v6 W, _ ask turtles [
/ R+ {4 r) m4 o/ x2 s! I if pcolor = green [% l/ B/ m/ f* Z$ f; l; V. M
set pcolor black" R3 S* N" B1 Z# `" Z2 a
set energy (energy + 10)
, o" I8 E: V" R ]7 n* m- r, |0 Z7 A
ifelse show-energy?
( ^4 v0 E1 r4 W# h% L: L* V2 o4 @ [ set label energy ]
) r! C5 M( ?4 ^, O [ set label "" ]
! I2 Z5 o j7 Z ]
; a3 Q: v G) B; d3 eend1 q9 I- P7 C! Q
to reproduce
1 i5 `) c, _' H9 ] ask turtles [* [" T! g$ N: C1 [ r1 a% \; F6 o
if energy > 50 [
* e( Q- a5 L1 H# c! k: {1 I6 L7 E set energy energy - 50
% x; m. X+ s/ ~5 h% y T$ O6 N hatch 1 [ set energy 50 ]
0 [) s- T) I( b, E: B' U; G: K" o& M ]
+ Q! r/ B. `& n, a; P8 _ ]
) Z/ d3 x4 @% r& vend9 ]! ]4 a- R% t- y
to check-death
" [- W; `/ c9 W: D ask turtles [* r/ B+ o1 {: }! Z( v
if energy <= 0 [ die ]
7 [% C* D; d! X K5 T+ M5 n$ v ]8 F7 C' @" S) x- e
end# g& q; b+ T9 f( j8 } [
to regrow-grass, t& |5 [- x( J0 J. x$ O- W
ask patches [" \% U8 U2 p$ ?. Y B$ ?
if random 100 < 3 [ set pcolor green ]3 ^7 L3 p( Q l. U: x
]
9 ? F. e p% qend
# S; t+ P y0 k8 nto do-plots
: c; E$ v# g0 P: [8 S! P set-current-plot "Totals"! a3 s% W, P- H6 ~* c- C, p
set-current-plot-pen "turtles"
7 k8 z8 f, C! ~- d- H plot count turtles
( f5 }" p; {$ a7 Z! a; C! X7 `) O set-current-plot-pen "grass"5 L& x: M- ~" L- t5 m5 {
plot count patches with [pcolor = green]
8 [4 s7 Y" {& V# \end0 c! |8 A1 V" D
可是运行时提示no such plot: "Totals"; P1 R! m9 ?. v/ W4 j. H3 h* n
error while observer running SET-CURRENT-PLOT( ?) r$ r$ R+ J! \
called by procedure DO-PLOTS2 ?4 i; O/ M; X6 |! P
called by procedure SETUP
7 _ `0 q) {4 l called by 按钮 'setup'
; E0 Y% n- ?' g2 m/ q! M# @求大神解答啊 |