我编的程序如下turtles-own [energy]1 P. B2 e& H& ]) ^
to setup
+ E( O0 a2 j- E( j9 x) R p. p$ ` clear-all6 p* g- [- [( U8 P# V
setup-patches
, i: n8 x2 u$ l3 M create-turtles 1003 D, N- y$ L! {' \1 d/ @* J% E+ w
do-plots7 D( ?4 w% Y, z
ask turtles [ setxy random-xcor random-ycor ]
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to go" R' J, p/ n% u
move-turtles- D% }3 M Q0 k
eat-grass" P7 D( ]9 O4 i) B/ k
reproduce
: a2 w( p' `) V: N, y+ o check-death! e/ v; @0 @8 J6 Q, L6 t# e
regrow-grass
! k. k+ J3 I- j$ A0 Y/ P8 h do-plots4 [/ ]5 ^( v& s6 ?( b7 B. U( X7 `
end4 C- b5 k* \2 n# C
to move-turtles1 T$ w4 o& e& {' w8 L$ z! I1 `9 q
ask turtles [5 s! B& Q% X: l; {, y7 }$ e
right random 360
' G' }2 T6 X7 W4 { forward 1, G( T, d) y/ R: j% g6 q. D( B. W
set energy energy - 1 D$ u/ N& V1 O8 k1 t5 m
]
' ~/ y- V3 x! vend
$ {3 D! R! Q) V+ ~to setup-patches
6 Y/ d1 |$ T2 d0 ]9 e ask patches [ set pcolor green ]" n" |/ }3 k9 b- B
end" F: f u, K8 d
to setup-turtles
* ~5 H0 V( L! @ s8 S5 w create-turtles 100
3 `( ~; x8 ~/ q, I" C0 b- M! c ask turtles [ setxy random-xcor random-ycor ]8 _, i% F6 i; z# ]( z6 I* T7 H- o; R
end
2 E$ k1 k* s3 T; Z1 N6 l; wto eat-grass
0 v4 p, I4 S) P: c4 C ask turtles [% m8 Y( h/ w9 l1 c' x
if pcolor = green [
3 l3 A% ]* u8 F7 c set pcolor black# p8 ^, q- j( M" a& r4 m
set energy (energy + 10)
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2 z8 q0 ]2 p$ R! O- }0 C1 n ifelse show-energy?
/ s( o! j# G6 ]9 R6 R% d' D! } [ set label energy ]' `& Y5 Z% B0 p+ r9 N. T6 M4 o
[ set label "" ]
n+ h2 q; i9 z- f ]0 h C, ?: U# o; q# s& }
end0 k% Z- y: A2 W; t# [0 m1 p8 T
to reproduce
9 C8 U3 K. K$ T& y1 ^4 D ask turtles [) W% I" H4 [ L4 }! _ `/ N
if energy > 50 [
- |3 G/ g5 p. V/ @' V set energy energy - 50
0 p, C0 P0 r# _ hatch 1 [ set energy 50 ]1 n; X# o1 f9 J2 ^, s
]0 {1 n6 D7 T) m# ~# c/ c1 `
]
; q, x- R3 ^$ V% Aend2 _2 b. N7 V) S% `+ C ] k5 o
to check-death
& e3 e8 G+ M! J+ i- J0 \ ask turtles [
- G6 S0 q1 J* F; F0 ? if energy <= 0 [ die ]; c2 W; |/ O6 h, y4 A o9 h( s
]. J$ r9 I4 N/ S* _7 l5 K8 H
end1 X3 x n7 T0 g9 v- }7 m6 _
to regrow-grass
4 P1 S G0 G' O5 V* _4 z8 h ask patches [4 i# e# g \* m { Q
if random 100 < 3 [ set pcolor green ]
% J4 O+ G& R! Z ]
6 U* A3 L% x6 y) b5 e5 oend
6 J+ M ~/ {9 [- ]% ^3 yto do-plots) ?( o0 K: d5 M
set-current-plot "Totals", R' V- }& ]' a
set-current-plot-pen "turtles"
N7 ^- X- C8 z" ^* _2 A8 @3 R( p plot count turtles
# U% f6 t4 _/ ~7 n) | set-current-plot-pen "grass", U' p/ h! S0 O/ v6 J' d& [
plot count patches with [pcolor = green]
6 K- l0 ^2 P. ]/ [* \' l% Gend
* T* R2 Y! w+ i$ @! Y% f g可是运行时提示no such plot: "Totals"9 p3 @4 T9 n4 p+ w8 v: T5 U' _3 w
error while observer running SET-CURRENT-PLOT
) B5 F0 x* W% } w* F called by procedure DO-PLOTS& I4 T [* q' t2 f2 ^
called by procedure SETUP! x7 t( `9 r5 `( P% y
called by 按钮 'setup'
3 K& ]! N3 J2 `2 p( y& y( B求大神解答啊 |