我编的程序如下turtles-own [energy]
4 P2 t3 S* D- A4 wto setup
" _5 b' m& t' _ clear-all
, S0 X' p+ Y2 {2 Y setup-patches2 y, e7 h0 S/ q; O0 F! E/ |! ~
create-turtles 100
& i8 j3 r, s2 t1 F' x& Y4 r# _6 o do-plots5 c/ ]# e4 F6 E2 o9 b
ask turtles [ setxy random-xcor random-ycor ]
8 o# R' s/ k0 R# ~$ [/ h* Bend
- D9 C1 r5 }' s+ ]3 `! {to go
% Z. _- D8 m! ]5 \- ]+ C move-turtles
- z) J- S- f; H0 @8 n eat-grass5 a1 ]: d% \& x Z6 C( n& I
reproduce
4 O3 Q8 |6 Q. |$ }( \- c2 s& }1 { check-death
7 J6 X) }3 ^( v, O regrow-grass
) ]3 @+ c+ U/ \9 ?3 b3 h do-plots
3 D$ R: b7 ^- V! }, V D5 r8 ]2 Dend
" J4 s3 O1 a+ _to move-turtles
6 {8 G6 D K+ P5 i c: y ask turtles [% O* \* v: N' c7 ^# n; n5 p( k0 \1 P
right random 360! X! U" r: C8 G2 G$ T2 w
forward 1. _2 j5 j W2 O9 s/ C
set energy energy - 1
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end t8 [+ O4 y' v( \; I; i
to setup-patches
# j6 [. P1 n* K4 Z& L5 \ ask patches [ set pcolor green ]
/ }9 {* a( K. U% ^end3 v$ G- Y4 b* a5 M
to setup-turtles, t9 E8 @' P2 L2 G
create-turtles 1006 y+ F1 l* |9 q/ {* l
ask turtles [ setxy random-xcor random-ycor ]
3 `! ^% Y9 A! O$ o Rend
3 n- k8 c8 x5 w/ |. ~( Fto eat-grass5 R, I5 W8 ?; x6 I; _" g
ask turtles [
2 g6 S$ b; F! o if pcolor = green [
, O/ D0 T9 F* r* _. U% u! ~ set pcolor black8 q7 K# n6 p7 u' _7 [1 C+ I
set energy (energy + 10)) R8 p# K4 F: Y/ t* V7 [
]# ^, u, v o' E- N* t
ifelse show-energy?
/ g' c0 b9 t& X8 Y. u0 g/ m [ set label energy ]
+ Y6 C. d( s# | c [ set label "" ]
+ @ b! C1 n; I# ?; q ]5 H3 z3 [3 d; W( Q
end% e J0 D: D5 O$ p- K" @: w8 }
to reproduce( x3 G2 O: a$ Z* V0 r- _4 J
ask turtles [0 \' M1 h" o B: x0 U7 ?4 g& p
if energy > 50 [ J* s8 m" W% z- S% L* X
set energy energy - 50
- i/ e+ [$ o: m D hatch 1 [ set energy 50 ]
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]" C& {9 u6 v6 R5 q. h+ ]. [& C: P
end
2 J4 l+ |" [ q sto check-death# L- W, c2 z1 F6 ?' G: a2 n- q
ask turtles [
9 `/ z/ n- C6 _% F" N, N& m if energy <= 0 [ die ]3 Z% q ]2 L& k2 s" |: v6 r0 o
]4 G5 d* {$ D3 J- n, M7 t
end
9 n9 l+ R5 }% P' P4 Bto regrow-grass% e9 t! U6 a! ?( ~
ask patches [7 ~6 g* w5 G& L8 W2 N0 j3 X
if random 100 < 3 [ set pcolor green ]
& a7 ?+ {5 ]4 G2 o# h% z& x ]
( {9 V9 U% ?0 d3 x) U Xend
* J3 S5 }. k4 \to do-plots% t8 ]2 t- k1 Z1 D! E" t# C
set-current-plot "Totals"
) s8 G+ }6 B4 _5 q- n! G4 I6 r set-current-plot-pen "turtles"
7 V2 ^- Z2 N+ Z4 R4 @; V6 z6 }2 j plot count turtles R& R1 H2 Y, B* X& ?
set-current-plot-pen "grass"
9 k5 h6 ~5 b$ ? K' ~. ~: ? plot count patches with [pcolor = green]
$ m$ D5 l) v# I6 T* C$ {1 Kend) N& r" \# ~! }3 Q
可是运行时提示no such plot: "Totals"# P% N: U6 c& D1 x% K' i" m9 o
error while observer running SET-CURRENT-PLOT
0 ^5 {: @: L! C5 [9 }0 v called by procedure DO-PLOTS
+ w% B& P$ R1 @ called by procedure SETUP, W9 o4 T+ s0 H
called by 按钮 'setup'
2 T, z1 e* t8 e, r; b% y; C求大神解答啊 |