我编的程序如下turtles-own [energy]; R, Z7 }9 j+ D1 c
to setup) B3 S- p1 \8 E# I$ V
clear-all
" S; H# f& ~8 P. g; ^% o! a setup-patches4 q* _/ Q( P4 K" _! \+ A; q
create-turtles 100
! `* E* A2 \' `! f) g$ X do-plots
) F. ^0 D* E4 _% g7 p ask turtles [ setxy random-xcor random-ycor ]( Q6 ^% \; ~3 j5 q
end
3 l1 p5 X1 k, L0 lto go' H" s9 N' A* Y) i3 q5 g
move-turtles
* w1 ?3 D: c0 S1 F8 d- O0 w eat-grass
* S3 Z& Q, A# K4 P# f' t. o+ e/ z reproduce
5 [) Q8 l7 k8 B! i check-death
- e! T/ S, r+ X; U5 f0 d5 ~ regrow-grass+ X& ~* {, p! ?) I6 ^) |+ Q' a7 h7 D
do-plots& V5 k7 K& z. F
end
+ X$ W# Q8 D" M9 A/ L9 ~4 pto move-turtles- C. ?4 V, y9 O) S" Y: Z" r
ask turtles [
" c4 W6 ]" V3 y- V& c$ a right random 360
1 q9 k9 ~7 I. T' [ forward 1
( d+ A, w. v0 S6 ? u set energy energy - 1
$ p7 ] T9 S! u; d. I, P ]
* J3 B& @8 k9 W! hend+ e; f5 O O( S4 E
to setup-patches* R. o3 @0 p$ C5 g& V
ask patches [ set pcolor green ]$ _/ U5 \ O0 [% p$ I/ S4 z2 O
end* O1 j8 z4 J; B r1 T
to setup-turtles( H& u- l3 ?; U) p
create-turtles 100
* ~# p; B$ Z) L3 D6 y. R% G4 ^2 y* s( U, x ask turtles [ setxy random-xcor random-ycor ]
, b: t: Y! b# ]+ @( F' y: Q; \end
1 C# J$ \# j$ g( g& S# l3 Jto eat-grass9 E* K# E4 [- [: R) s* W
ask turtles [
i( m3 J3 v; o. i2 I# y if pcolor = green [/ I* J0 ?' e( o( p( z/ G2 B
set pcolor black3 W0 H( y) v& @0 l @
set energy (energy + 10)% p- s6 c3 L0 M3 i% ]: _2 q
]
7 L, E. `9 V) a$ G ifelse show-energy?) w) O5 a, H$ Q1 i; r, f
[ set label energy ]* h1 L1 l# ~* Q& v, }. B
[ set label "" ]- L/ g, D1 i& u. r* L
]
) e. F- Y. z1 `4 Z! C5 F/ Rend5 g* ^- [$ A4 v9 _4 c q
to reproduce
# I' _0 ~, r4 u% ]+ o ask turtles [
6 ~4 K( d" p6 y! X! y if energy > 50 [
: t0 p; g3 H8 O' E7 w4 q set energy energy - 50/ l+ l5 Y ?- A. o/ a; V
hatch 1 [ set energy 50 ]+ I/ ^1 V/ W! s- B
]( K/ _7 Q1 F8 ?( V
]
0 `+ ?: ~8 [- M+ U! Fend2 X% E' e7 m ]: r( l: L2 }
to check-death( U8 Q( {; p2 z# B) P0 G9 V5 W* s
ask turtles [6 Y) A w( D( B/ _5 w
if energy <= 0 [ die ]0 E/ G. g R3 T3 ]: K$ C& d; j
]
* D! |# m5 O$ ^& O2 z" C9 `# Q1 M; iend
* k; Z) Q& c# U2 w, [0 w/ m% ^to regrow-grass
9 }8 d/ e. L, S9 `: d ask patches [
! H5 ?6 `/ p4 a6 J N9 S if random 100 < 3 [ set pcolor green ]
# n1 {- ?& i9 Q$ D5 K% z& ~ ]
$ ?% m0 s$ c$ w1 `9 D8 lend% G- d# r, Y+ `+ @$ o
to do-plots V; c: A$ Q9 \' N
set-current-plot "Totals"
* h" V, l! Q( Y+ @ set-current-plot-pen "turtles"
v2 V+ l4 P) j& J5 H: c plot count turtles
C* c2 Z i7 E- E& g set-current-plot-pen "grass"; X# `( o9 O: U" V4 }4 V K y9 ]
plot count patches with [pcolor = green]4 M1 u* k( {/ x
end
* ` M& k+ d) J- i5 Q可是运行时提示no such plot: "Totals"3 Y! O; C2 \ J
error while observer running SET-CURRENT-PLOT
- C2 }' D3 F( T" a& J& C. R4 ?: p% D called by procedure DO-PLOTS7 V3 y' W. U. H
called by procedure SETUP
) d2 }) P |4 f# F1 M+ k called by 按钮 'setup'
2 d: R8 V4 d: x求大神解答啊 |