我编的程序如下turtles-own [energy]3 G3 F( g( }$ T: i
to setup
1 y: N- q( M- F7 T! J% | clear-all
* ]: O- q# \( r+ v$ V setup-patches
2 Y' @( T! W: B& E0 r# V8 U) |, Y5 Y create-turtles 100* |$ E% p. b* t+ w0 W
do-plots
' x" x$ k# s; h: U; C ask turtles [ setxy random-xcor random-ycor ]9 \$ D' I5 F0 y' @0 T5 ?, A$ ^
end
( e# f% l0 C, p% \9 |2 C8 `# |to go
; ^, H" y8 k. g5 [ move-turtles
5 j" @# d7 n& B6 Q eat-grass5 l1 u) h9 I8 W! _( n
reproduce+ e) D% j. r( J- S, x) O, _
check-death3 I H/ W, c. V- I6 W3 h* U
regrow-grass
3 I/ ~. R5 L. u: E3 h do-plots( f0 J0 K& _. B% l. }# c
end4 P x: }# G) Z; P
to move-turtles
1 r" z3 |3 |$ J" `6 \ ask turtles [% }, J+ }% D* P
right random 360
2 D9 y' v9 m+ o% L$ y forward 11 ?+ v$ n# E# n# V
set energy energy - 1
5 m/ {, K7 [0 h+ y ]% z; S# y% u n3 I" D" x; Z
end
/ p3 h/ `: h- G# {to setup-patches
! K8 k& Y8 }1 S) t! h! A, V9 z0 G ask patches [ set pcolor green ]
/ z, R0 e! j* L% A3 lend
# S( Z5 Q& F, ^, `" @to setup-turtles& M% W) U* D! W8 q' h& ~. S# j
create-turtles 100$ L) B0 r o3 C* S
ask turtles [ setxy random-xcor random-ycor ]
; o5 ~6 r0 G3 T) K/ g# b# @end( L$ g: ?( u n \
to eat-grass5 R3 w5 b: N4 e
ask turtles [" U+ n3 X" T7 ]# h1 ^3 X
if pcolor = green [
9 U* Z- |/ I6 J6 U set pcolor black
! f. d# D: J. i/ _+ E set energy (energy + 10), O/ E3 g1 c+ K$ H+ _
]/ A. a8 r1 r7 i# ~$ M
ifelse show-energy?
+ z, ?! G' S5 F) F2 t1 G$ F, b [ set label energy ]) e8 R; @2 I: H: U
[ set label "" ]
2 [7 Z1 \2 p% [) \ ]
: [ ?1 c7 U0 ]4 kend
6 U8 V( ^. ]" x% u0 _to reproduce
9 c7 T3 X# K, X% |# ]3 V ask turtles [7 C3 `/ r f/ P5 @$ _* x
if energy > 50 [' A$ u2 c" A) V( ^# {( W3 H
set energy energy - 50" \/ } c! b& h
hatch 1 [ set energy 50 ]
- x" M5 G1 i: S! f5 H# z; e/ n: R ]7 Y( o Z7 d9 Z; C% V, g
]: i. k% l" I2 p+ l* c
end
; }8 f+ V+ w2 i1 ?* Nto check-death
/ ?+ E0 I% E) d. b8 z& | ask turtles [
" d: F* e9 r& }% Y2 \ if energy <= 0 [ die ]- C2 Z' l! g, i* v3 b) N
]; L- `+ ?* A* b# Z& B
end
6 k: S- X7 g9 j4 V7 P, a* Fto regrow-grass5 D2 ]: h6 Q2 R. }: \- |& E0 W
ask patches [
. n3 c6 b; i! x) b if random 100 < 3 [ set pcolor green ]
3 Y# e. M' @+ Z8 I5 R2 ] ]
/ e8 |/ B0 P) e$ F& Z( c$ E; p$ lend* b1 f- A: W4 }5 Q' j( q! q' f/ h% o6 ~
to do-plots; d& W' H" C, V/ f& {
set-current-plot "Totals"9 u1 T0 \ t: E& {6 C( X" x
set-current-plot-pen "turtles"9 u V+ T! L. D0 u( Z9 W
plot count turtles
# V( _# e% c: Q9 e9 K! @ set-current-plot-pen "grass". |, n4 s* B: f
plot count patches with [pcolor = green]; J/ v' ~$ [( d+ M. `! O; f$ U+ B
end
2 F4 Q L( Q5 q& e1 g3 ~2 X可是运行时提示no such plot: "Totals"
# {- ~* `8 ?1 Z9 Terror while observer running SET-CURRENT-PLOT' i' j/ h' B% R) f* [: O
called by procedure DO-PLOTS3 P/ o7 H9 E6 r4 o. w& H
called by procedure SETUP8 @5 _* B+ R( O- q+ `! O
called by 按钮 'setup'$ p0 \! D3 E$ L9 S! s
求大神解答啊 |