我编的程序如下turtles-own [energy]( t: A3 V% z; M) V0 w
to setup
, r5 R8 y5 @" A) A clear-all6 Z b" ~% D* H
setup-patches
+ @+ q u( g* r$ [+ W3 D: o K create-turtles 100# E7 c9 M1 r( x. U5 x
do-plots; T" |* \* i' n2 v& J# h
ask turtles [ setxy random-xcor random-ycor ]' U u* t- m+ F% q9 [
end
$ H6 [# ?* A7 B- [# C# Gto go
7 o9 v1 M/ s/ i# T# E7 ] move-turtles
: x8 e) c c* R, ^9 X eat-grass* e$ e: W1 v' T& t
reproduce7 p) h/ V: C6 o! e4 o
check-death
; U& _: r! n( c3 B" u regrow-grass# n$ Q0 h( Q/ L) `( `- }# q8 ^
do-plots0 L. e F. `7 S' Y$ m! }5 p- F; ]- y
end
$ k, @; ^& `4 X" N$ v8 X1 o( G% qto move-turtles/ X0 B4 P0 E9 M$ F" X( |: @* v
ask turtles [
& W4 B' u. J1 E) [ right random 360
3 O9 C: o4 N R( x" r5 l1 s- T forward 1
* x$ e# i" Z/ L$ k, t, Z set energy energy - 1, K# C3 G0 V* z# u- \
]
) o9 n8 u) s$ [& n! ~end1 b7 J$ h2 ~) P0 `3 l- ^7 B
to setup-patches# O( [/ M; V% T# U5 e
ask patches [ set pcolor green ]# v w: s$ W4 l1 x( J0 v: ?: W
end4 Y' b9 ~- k& ?- v( z
to setup-turtles
5 L& S) b. `: w4 L create-turtles 100, C( v+ A8 I+ \' C
ask turtles [ setxy random-xcor random-ycor ]/ b6 ?$ T z- ~* K% J m
end
3 \. F& m" f/ x( ^4 j6 I3 [2 Uto eat-grass
2 q! t- L, x3 b0 |8 c3 e ask turtles [3 U, {6 }! l, D# L
if pcolor = green [* C: B- N& J0 p3 h$ o) j
set pcolor black
- z4 n* D4 |, j7 W set energy (energy + 10)
* s8 b3 T9 |' @ ], F* N, j" A7 `1 M2 B
ifelse show-energy?
* q; v4 V* F6 [* B9 G [ set label energy ]8 F1 e d& x1 S, R
[ set label "" ]
$ h; L% D1 u# ^6 l, _# C ]$ L# u8 N% c: [" d, M
end! l0 Z5 s6 s' J! z. _
to reproduce; w0 \! P/ y4 d% v
ask turtles [) ?; K, E7 S( |4 y' T
if energy > 50 [
- O Z5 P3 s) j. ?4 ] set energy energy - 50% Z5 d" O7 O F
hatch 1 [ set energy 50 ]
$ ~& e( T1 h' @3 ~2 _# M" a ]
) a1 T. o* t X5 E* \0 S$ h6 ^ ]5 e' `8 `' b# o- D. H5 }( Z5 I7 t% P5 u
end
3 R: q6 y, ~+ {! Z! v6 F: Eto check-death7 T$ p) y! C- {7 _' D7 k
ask turtles [, F2 o1 R0 s9 V3 Z" ^4 T9 ~5 \
if energy <= 0 [ die ]- O% J& C: K: P% C9 X4 P* G1 m5 l' M6 j
]8 \5 _! Z6 }0 f" b) U+ \9 M
end
# `+ o$ x- q jto regrow-grass% U0 p( O- J6 l9 c9 J) v3 t
ask patches [
* w+ R6 u6 F% I7 Y4 U5 m' C if random 100 < 3 [ set pcolor green ]3 @. h# L" |# p. k5 e7 ~$ Y
]
6 X. K) n" s: ?8 \end
3 p6 Q3 l3 h- m. Jto do-plots- I1 p: N, n i4 H1 x8 Q
set-current-plot "Totals"
5 I$ T' j& O) B! u: w set-current-plot-pen "turtles"
2 k/ d' D* r2 [/ R plot count turtles
& o" p* I" _; Y, x5 M& J/ m( F set-current-plot-pen "grass"
' [$ m P1 S7 X) n plot count patches with [pcolor = green]; ^% R% ^7 s5 p6 w8 q" p+ m
end
" h; x* i2 Q/ N( P& t可是运行时提示no such plot: "Totals"
4 u; ]. @# a6 q5 C" ~0 Rerror while observer running SET-CURRENT-PLOT
" ~3 w: A$ R; ^2 f2 g called by procedure DO-PLOTS: X: m' L t5 F2 n0 u
called by procedure SETUP
3 m" U, e3 l0 Z called by 按钮 'setup'
5 L8 Q' p0 c. C( X求大神解答啊 |