我编的程序如下turtles-own [energy]
1 ?6 N4 b9 g4 {. G3 Ato setup
1 m% | |, J0 {! k/ O/ R3 w! T( T clear-all2 A/ b1 w# {' R! M6 a& g8 A
setup-patches
* x7 t7 Z1 \* T& \+ w* W9 Y" { create-turtles 100
2 n w# h* S# K+ B do-plots4 G% S. q/ C& _
ask turtles [ setxy random-xcor random-ycor ]
( ^8 e3 |; n- \) b* b4 f* U7 g1 fend' Z! e: s- l; u n
to go; X6 B& E4 C: z! L8 w4 }
move-turtles5 E4 ^5 V+ Q! |, l f
eat-grass2 c% o. x. a2 [, G( | {5 @3 N
reproduce# s% P* f/ Z/ X/ K
check-death
9 I1 f# C2 K9 I4 S) r# L regrow-grass
: B& J& V% R9 |# v. {) S* h: T do-plots
h& R2 J! S. p- P! ~) {9 ?4 d* lend! j1 ?% ]( K5 | F
to move-turtles! C7 t7 J/ T8 i9 `; V
ask turtles [# R! s+ s% J- b- t7 [
right random 360" x& i" h3 g j( b5 S7 ^0 ~
forward 1
! W# Z. n5 ?, r; a! h: j) f set energy energy - 1, X7 R% W( A# |7 j* Z7 d
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end' m. n0 R ^/ t: H$ J4 |$ j
to setup-patches* _0 z$ |, j) h7 M
ask patches [ set pcolor green ]
( Z% k2 w0 C* H6 Z% X1 y. yend
9 c9 V$ H7 W0 \( L n# \' Z" w2 Kto setup-turtles
9 X0 S+ k% N" H) ? create-turtles 100
0 S( x5 i3 w3 D$ w ask turtles [ setxy random-xcor random-ycor ]9 O2 F/ [: R2 R- u! R& \: ^6 i
end
8 Z2 d. W6 {& @" W" R7 jto eat-grass# S' m& L& X" |3 E6 J2 e* V
ask turtles [
# J) Z+ o3 u7 C& ~ if pcolor = green [' Q. e' p! Z) z* m) y
set pcolor black4 D4 t. Z/ Y/ I1 t0 E& u
set energy (energy + 10)7 V, N0 i, T# o/ b$ [# a
]% D: q/ C! y; J, {7 q9 u: V7 ^: j
ifelse show-energy?
7 E4 A9 e n6 M, R" y( q; | [ set label energy ]6 Y0 h: V$ Y: ]1 |4 f$ u. L
[ set label "" ]! c5 W7 ^6 M& ]. _1 G1 T
]+ s2 @4 Y8 {2 S6 q* p1 R
end
; O/ [' `4 e% |0 _6 hto reproduce
5 R: O2 v+ F) Y9 D6 r3 T' ^: c/ G ask turtles [7 v) Z* L; u- F+ \. ]
if energy > 50 [6 D: |* S" P) x1 z4 N
set energy energy - 50
( ?8 N( o5 h8 \7 @+ F$ k* s) W! g hatch 1 [ set energy 50 ]' B* y, T7 `" r6 t4 n; U: Y
]
{$ ~+ C* S: w& m ]
: ~7 e: B" I; |( A' |4 Z1 r6 jend
3 ?1 ^0 B6 A+ H! Nto check-death
3 X' |1 F" K& r; ? ask turtles [
7 n; f1 m8 ^; D3 q$ e if energy <= 0 [ die ]
+ x2 s% ^0 \# a$ \& q. {- v' U ]0 k* v* ~, Y. |7 n7 ]% t
end( U B. r/ r) b" I6 c8 L9 A7 U
to regrow-grass
; [. e/ O- f) U. k4 a ask patches [
/ B; W) C0 D# M0 B- R6 l Q if random 100 < 3 [ set pcolor green ]
& S, J; e8 D& j3 N! l# n0 I5 C4 [ ]5 C2 {: E3 a) D, q0 T6 c
end
# {3 s' c* }: B2 [ z7 {to do-plots4 I' N; A* V- w; b4 M. Z
set-current-plot "Totals"
2 e% L6 `' ]- t" F! V. Y set-current-plot-pen "turtles"
6 e8 Y8 d# Z+ b5 f plot count turtles
4 d2 f$ ^' p, z1 D2 R0 b set-current-plot-pen "grass"! K \6 I' e: c9 `0 c, C
plot count patches with [pcolor = green]1 P% T- f1 X- }
end" B5 s8 g. D& q8 Q4 ~+ Z; M- \. V
可是运行时提示no such plot: "Totals"3 }4 Q4 m1 @% n) J% Q! v1 v1 y
error while observer running SET-CURRENT-PLOT, y, ~; l* h5 j: x" F+ B
called by procedure DO-PLOTS& B( o, m. U' E% r6 s: P7 y
called by procedure SETUP
- {) ]/ ^, B4 Q called by 按钮 'setup') E; c* R+ W6 s" h4 X
求大神解答啊 |