我编的程序如下turtles-own [energy]9 q% G4 B7 n6 ~$ Z7 E3 V$ |6 ?
to setup
# @* X4 ~, M& t: ~) _% k clear-all
. ^5 P- S' S/ L @ setup-patches
7 [0 Y5 [8 h2 V/ ?5 a0 d create-turtles 100$ _1 }7 U( m. Q$ J2 E
do-plots
2 S; m1 a" T! t* G ask turtles [ setxy random-xcor random-ycor ]
2 L: ?3 Z, o, ^9 p8 e% f8 [end
- e8 u) u0 q$ e6 _5 V3 D6 Tto go
1 p$ ]- r7 M( Y/ J. J: m& n- U& h move-turtles$ e! e" o( ^7 l/ t5 t, p, C6 O
eat-grass# h2 h& g0 y- S% e9 r
reproduce
6 T% I6 C% E0 K4 p check-death5 l) ~, w7 q+ F5 f7 f5 L3 O
regrow-grass, E# [* \, l) Z$ s1 S
do-plots+ z0 f0 Q/ u7 E1 u
end* F& F$ v' Z: w8 j( {' A4 E4 F/ E
to move-turtles
& m7 q3 G, U) z1 Z/ @' l0 S ask turtles [
9 o7 x+ |; z- K& n" v# W% ~ right random 3601 j& s# K' t$ k" s
forward 1/ |0 A/ }$ v& ~$ z5 l {$ J
set energy energy - 1
8 z3 Z, ] a* y) H: K& N ]
% L& N; y. ^1 |' |9 T$ d1 B, Y0 _1 `end
1 y5 u' H. |! H+ `+ c1 nto setup-patches
0 T- d6 Y! F& F0 M8 m! p, P8 P& f ask patches [ set pcolor green ]
/ a- [9 U5 d$ d% r: pend
/ n. D3 O( v U6 cto setup-turtles( }- q+ P# Z L: p/ S# U
create-turtles 100
1 S P1 B5 n5 z1 X6 d1 ^. x- ~+ t ask turtles [ setxy random-xcor random-ycor ]! ~( L0 q2 E( _" P3 c6 H
end) l" a) O7 E3 z9 N6 X' H# [4 j
to eat-grass4 d5 E2 Q. m& O6 t+ x
ask turtles [
8 e$ _* B6 e" w6 L( J1 C8 ?3 ~ if pcolor = green [1 ~5 f ]4 h$ {9 p4 f; n; J" M
set pcolor black
( {% \! \0 e" X% x: Z% s, Q set energy (energy + 10)% `. }+ j7 H( B: |# z! ~; M; p
]
% ]2 U% m8 Y8 h) ~6 g# R ifelse show-energy?- l8 a8 ]% @3 f3 {+ n+ r( Q f
[ set label energy ]
7 r( T- F, f+ E% C [ set label "" ]- v7 j! y) C5 N! D6 ]+ h
]
+ k( `9 e, [9 yend
& w, \: j$ C( ]3 B* ato reproduce7 y$ U. q( w2 Z. V6 f% Q; W3 [' a' {
ask turtles [/ f+ }$ w' w6 g# c2 ?7 g+ S, l
if energy > 50 [
8 Q+ U2 T6 Q1 M5 X/ K5 I' q6 a set energy energy - 50
9 T- f' c7 `. _4 f6 G- ?/ [7 o hatch 1 [ set energy 50 ]( \3 \# T9 B* e) @& v
] s. L$ h5 _- b% ?! }) V3 T
]3 ]" D7 @% s/ r5 s% ]% ~
end1 P F2 q0 U+ n* _7 [) y+ R5 s
to check-death7 e" g9 O% R, X9 O( S
ask turtles [
: K# O$ i5 w/ g9 h! K w2 F if energy <= 0 [ die ]
% U# L o. J' b2 W6 P/ ~ ]
7 ^% [, q% K L w6 Oend C7 W& O5 m$ J; z7 S; _& r
to regrow-grass+ F" A2 n( h4 b7 l1 w- B* i8 e, c
ask patches [
0 A9 p4 ~2 L* W( \ if random 100 < 3 [ set pcolor green ]2 _8 Q `" [) O2 X) K: r
]
% o7 m- a* f @end
0 J; H. B& k. ^5 \to do-plots, [) M* Y3 E0 h$ ~5 E1 ^" K6 Z' y7 h
set-current-plot "Totals"
7 o& M) x2 H" |2 J& Z) N0 b. o) a' _ set-current-plot-pen "turtles"
" y s' V/ J1 C2 A, o/ Y plot count turtles- T! s% Y5 ?4 L0 [% I
set-current-plot-pen "grass"
6 u* M+ G4 a" T Q; q8 o+ i+ V plot count patches with [pcolor = green]/ A) \ d) F% d+ b7 L
end' Q& U+ q0 X# w; l# l1 |; y
可是运行时提示no such plot: "Totals"
" M/ U( z4 x/ E7 Rerror while observer running SET-CURRENT-PLOT
# \ B9 `5 @. j called by procedure DO-PLOTS
6 j" ?+ m( w# f) J% n8 S called by procedure SETUP
9 l& C6 r4 W6 Z1 ` called by 按钮 'setup'$ m1 n2 q9 d0 [
求大神解答啊 |