我编的程序如下turtles-own [energy]5 G4 j2 ?$ s9 U4 @% c: B
to setup; ?1 D) F) I0 u+ J! m% C1 T
clear-all4 U3 q& `$ v, f5 f4 G& ]
setup-patches; i2 w6 j, F6 W3 k! p/ e) |
create-turtles 1003 V! m5 Q% ~* R' S0 K3 M' Q
do-plots
- r0 \, G* C) f+ k0 w" ^ ask turtles [ setxy random-xcor random-ycor ]- l- |( ?: b* F
end4 s( A/ x3 P# Z) c5 H9 V
to go
9 V( Q- A. f- A7 e5 S move-turtles& C8 E8 \! f; ?) ^. J" y
eat-grass
; ^8 E ^' X/ Y$ \( U: M reproduce
. m8 t) m8 X7 D check-death
7 L d/ _0 N0 t regrow-grass
; j2 V r: H i6 W do-plots0 j- B8 A; @1 ]0 l" @2 m! r
end/ l1 }8 v: f# u1 \
to move-turtles
9 G8 n0 k' t; }; Z+ a4 V" R, Z5 g ask turtles [2 C2 s) a0 G+ w- X8 D
right random 360
: [# u$ C4 a. R9 x forward 1
7 i6 ?8 \! N" H) R4 D, | set energy energy - 14 C0 \! ?& \3 J1 K4 ?) J5 E! H
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end
% p/ `! R, H: B, @to setup-patches
# A9 G6 o3 @9 \" v9 a ask patches [ set pcolor green ]
$ e2 L! t3 N! D" K/ E; z% eend5 n# v4 V1 t7 z" N
to setup-turtles
" l& k# t* D+ D$ s0 _# | create-turtles 100& n. V/ f; Q! ?% c# ]9 |1 L( b
ask turtles [ setxy random-xcor random-ycor ]
' Q1 t B- y0 Mend
* C8 E3 y' a1 L& s6 J2 H" t- hto eat-grass: q; _+ i" v( b/ l5 N* f9 Y$ \
ask turtles [8 u9 `! B9 Z) [7 C) B
if pcolor = green [: ~& \) G9 ]1 {/ S6 k Q& W
set pcolor black1 P; W) D! ^$ |) g$ W' K; V+ s
set energy (energy + 10)
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ifelse show-energy?
6 N1 a2 e j/ r/ g' A6 ~ [ set label energy ]
( W$ f# y* {# ` [ set label "" ]
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% q. Y! x8 [3 J7 x9 Uend. D" Z2 K1 ?# T! S# y- X5 Z
to reproduce
. B( n/ ^# v& i& g# F ask turtles [
3 ^- A1 t0 d1 j) L* ]: X if energy > 50 [
( o0 A/ q/ }% _* {1 k8 r, d" ^ set energy energy - 508 S. Q/ ^( p5 `/ c/ V1 |
hatch 1 [ set energy 50 ]
@( \, ]* a! S* v1 I; ~- z2 D- p ]
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) j5 C" f) K3 k% [end
: A) S2 }% w1 @9 C0 o" i3 L& cto check-death
, @ V# t, M% t1 g% V; R ask turtles [
1 ]4 z# e& l4 R" x* F/ M if energy <= 0 [ die ]
) p& M: x' ^7 U0 a ]( l/ b" `, H& D o- I% X' j
end+ ?- \3 u3 d6 L' Z6 X" r
to regrow-grass
+ H: p, A0 A' @/ M! z* g4 s ask patches [
, O9 t0 O) O( |! W* a" V) f0 o if random 100 < 3 [ set pcolor green ]9 | E$ W* M- h5 Q8 Q6 l5 ` J/ k
]! a9 y4 t. [% c. m( E$ s3 N+ h: Y
end
; P }& x7 i" K7 h& Pto do-plots) {* E* e3 w& R0 I8 v# k
set-current-plot "Totals"
1 d1 P6 w9 z1 i3 c8 {! s set-current-plot-pen "turtles"
" V0 h7 y8 |/ ? Y) p6 _6 G plot count turtles% m4 v/ m1 u. n' ~7 X! x& s
set-current-plot-pen "grass"# n/ s N- R8 b- x+ Q( a3 c3 V
plot count patches with [pcolor = green]
: J5 b+ V) [2 zend
2 J5 {' f' L. |5 f可是运行时提示no such plot: "Totals"9 a+ f* m7 P4 i0 \1 H& P
error while observer running SET-CURRENT-PLOT7 D2 b" ^3 O/ S" U+ G
called by procedure DO-PLOTS
/ ]& ]' N9 d0 [; t# B& n/ G7 c9 U5 r called by procedure SETUP" i" n W' _2 m" Q4 m
called by 按钮 'setup'
4 q6 O1 P3 V& T2 P求大神解答啊 |