我编的程序如下turtles-own [energy]- B( i3 o7 d" v2 n3 ?
to setup6 X0 h9 y) l6 n) _$ `0 s& t2 t
clear-all5 ?. f2 l/ j* g5 N) L7 h6 W
setup-patches
, t" | k8 F l! t4 C6 Y create-turtles 100
7 n" A( d! ]$ V, L7 T' l+ t do-plots
* @9 E5 O$ \4 |8 Y$ l ask turtles [ setxy random-xcor random-ycor ] f {/ T) b9 C* H$ k- d$ G
end* U7 q* E2 C* F" [9 x" v+ g8 f
to go
, p" @% Q! r' |& h3 [$ Z6 H6 f$ l move-turtles
4 }$ Q$ k0 k+ M6 P( m& R: e+ O e eat-grass
7 y) Z, ~+ J. f2 x o+ e reproduce( m6 B& @9 G. Q: a" `
check-death
. _" U l3 \. f1 @6 p regrow-grass `4 J+ b% T9 b0 }1 [3 S
do-plots
4 s8 N/ f. }1 o; |; Uend
p% w; E5 w# |5 [$ x# B/ q6 B# Nto move-turtles7 M' m9 I0 J, w
ask turtles [
8 s7 Q& u2 @; C% i: l right random 360. q( b$ z: v- Q( K1 V
forward 1
- Y3 A5 o# C+ X1 I+ j% k2 ^1 S set energy energy - 1- c3 i; [! z: \ D. d% ~
]/ m, Z* [0 z1 @6 `9 L5 i
end0 W8 u# `* S' @ F
to setup-patches
4 U+ E/ Q1 m3 w5 \6 O9 c& `8 d ask patches [ set pcolor green ]! S( _/ |$ k( Q% l
end t1 t* S% i# y* V( b
to setup-turtles
3 H, |1 Y, m8 x create-turtles 100
: A( N- z, h, m* a ask turtles [ setxy random-xcor random-ycor ]0 }3 _: }" C( r8 k( ^6 U
end5 }5 |0 s, Y/ A, q- C1 W; Z
to eat-grass( u k/ i9 J" @% o! p8 I
ask turtles [
8 ]! G3 a9 O7 L1 T+ v if pcolor = green [
& A }% H( y! ?$ _% A) } set pcolor black7 }$ T8 O+ }, _ u8 _3 v C$ R2 u
set energy (energy + 10)% P& u- k6 a2 b/ W9 ^6 q
]1 s2 r% Y8 Q; g3 Z3 n' G4 W
ifelse show-energy?! ~8 ~( Z, h' J- z
[ set label energy ]; w& n+ H1 m+ j6 N3 Z- u# A- o
[ set label "" ]
0 {1 o. p, Z8 g$ g ]
! n' n' {3 w9 E6 G! }end
( e2 t, E" D; r s" I# n# Gto reproduce) Y8 r7 W1 w( R- @. n
ask turtles [1 W& t& ?* P) p$ ]. {0 q4 @
if energy > 50 [
, V0 t2 y" m% r! C5 O+ @- H6 Y set energy energy - 50
. {+ Z" z `3 J0 N' Y" f hatch 1 [ set energy 50 ]
& d1 G1 F5 u( y ]
1 h1 T. H2 `- B1 r ]" {" [) Y) V8 @1 f1 U
end! j: t ^! R# {; R$ d. c4 U4 [0 w4 ?: n
to check-death5 e, v; s; v0 u3 W# W% l/ D- H: E
ask turtles [
1 i# h+ x% C+ P- P% }( r/ J( G) p if energy <= 0 [ die ]3 a3 H2 k+ v% G5 n% X' v
]+ o! U$ x/ c2 B; n: p: `# _, M
end9 T* Q8 n4 ]- o
to regrow-grass
+ A( k- e2 b' g! I ask patches [
& _2 {( R$ m9 }+ m' v if random 100 < 3 [ set pcolor green ]7 T9 a2 |/ Z2 ]9 C4 Q% j
]
* j' H1 W; m L6 j" mend
% c2 G- q( @ N0 f; v( C9 F& ~# Vto do-plots! f/ ^* `0 N' P/ Z' e
set-current-plot "Totals"
; u. y. e' R% C0 |6 x6 C D; u set-current-plot-pen "turtles"2 ~6 a1 B; \: z: W. W
plot count turtles. L5 n8 M( X. X
set-current-plot-pen "grass"
8 Z! \* P O. ?% @ plot count patches with [pcolor = green]
, P# |5 K1 X6 F9 @5 h- eend( k- o$ h/ c" F! A0 I5 I Z
可是运行时提示no such plot: "Totals". |; ]: p- W, \: {
error while observer running SET-CURRENT-PLOT
% E+ \! I' H5 E( u) G6 t$ Y called by procedure DO-PLOTS
2 a* x2 a5 d, k1 m! H5 n/ a called by procedure SETUP3 a" E" L% b% ~
called by 按钮 'setup'( ^% o! K( L* f- z5 \
求大神解答啊 |