我编的程序如下turtles-own [energy]+ z) h4 L, o0 H! q+ h3 R
to setup1 K1 D" j) ]' f8 o# a3 }
clear-all
! Q8 @ r0 S* n9 H0 P! N setup-patches
0 c' [: L& e+ M create-turtles 100* L7 n! ]" e9 b2 J" f
do-plots
0 r: b6 X( ]8 d: X ask turtles [ setxy random-xcor random-ycor ]% ~' F) ?) j, q7 e
end$ I2 _( k+ B b7 \
to go! q- s0 Y/ I0 R3 ?5 n
move-turtles
9 L; w' `! G9 f( t% t; ] eat-grass6 M7 w( u0 l" R8 r
reproduce- E) h; L- f( o1 _# w
check-death( U9 s2 m1 u) B; ]
regrow-grass- d% [7 ]. w( R/ _2 D- x/ W
do-plots
7 U& X: P+ N7 j) s4 Dend5 \- u0 K6 B2 T4 e
to move-turtles
5 [( G1 I; _; o+ _9 ~ ask turtles [
1 o2 I. T$ v9 P6 h+ V. n" W7 X* i5 k right random 360' ~+ K7 q# ^& O0 ~6 ]* E; x, G& D
forward 1
- a8 C, U: _- t- F set energy energy - 1! U+ D7 R+ s1 c2 r
]
: p5 G7 |' H. k" e' pend
/ A# z- T$ ^- |2 Zto setup-patches; w/ Q Q! f9 W: N* H- U. k8 d6 d3 L7 y
ask patches [ set pcolor green ]
; M; \. o" J8 X: o, R0 [ h# Bend
. b6 {% J6 e# ]; }1 l8 s2 t& u, mto setup-turtles
" r* D9 B. [- I+ M7 h6 m; t create-turtles 100# g3 ^8 q! E- i
ask turtles [ setxy random-xcor random-ycor ]- | _" c0 W. A7 D' H( T2 K
end
% O+ J( t: ^$ |& W* Gto eat-grass
2 T1 K- m3 I$ k ask turtles [
: a( Z' p/ U. w$ l# } if pcolor = green [; Q6 t& P7 v+ ~% t" ~ }" k
set pcolor black
* w- B \0 g0 P b( r; o) [+ [ set energy (energy + 10)
3 q! ~) l5 E. h/ { ]
5 o& U7 m6 O" X0 ] ifelse show-energy?
7 w p; o$ b* P. C3 i- F; V [ set label energy ]0 {& u+ s6 ]9 }, R2 h
[ set label "" ]& C; ?7 @+ k9 @6 ?5 @5 l
]* y4 `" z! Q) ]- J
end5 I5 g2 c" }, T
to reproduce5 A5 s9 p& N/ q
ask turtles [
, G. R! E, {3 i5 F if energy > 50 [
: o0 Y8 B( w! d3 M' L0 O$ C set energy energy - 50
- m+ ?6 s5 n5 L( H6 D$ f hatch 1 [ set energy 50 ]/ b9 B* Q, G. n( F( c+ U6 t
]# s9 j! v! K5 X
]2 B9 Z4 S, g, J. [5 i. m
end
" ? w2 q7 H# d+ s0 I; Ito check-death
/ I) h. _$ W( e4 a+ q% v; {0 g ask turtles [
/ ]- B+ y) K0 x. O) g& t: } if energy <= 0 [ die ]5 u% ^; b3 @$ F H4 O
]
1 J% ^( ]# ^7 kend
( ]& ?4 A- R( [+ Fto regrow-grass& v8 W# J# V0 f$ |2 Q b9 A3 v
ask patches [
, P. X* T7 H$ L9 Q3 X9 b if random 100 < 3 [ set pcolor green ]
, Z- A/ B5 h$ {6 R ]6 ^, k2 |0 u& j1 d9 _/ m1 Y
end
5 C& C7 [7 v, _1 E; Eto do-plots
* e- \; O4 k: o' a set-current-plot "Totals"
% `8 M- }3 o* M& V' V( w set-current-plot-pen "turtles"
' e& R$ m( k% ^ x* |' A! R plot count turtles* p4 Y: A' h% K4 m7 w
set-current-plot-pen "grass"" K+ \$ b8 E! x) I
plot count patches with [pcolor = green]5 |: o7 J/ s6 I4 B" O
end5 U8 ?; s, a8 c* m% J5 E( H$ B
可是运行时提示no such plot: "Totals"% i- ^& g# \, V6 i8 M
error while observer running SET-CURRENT-PLOT0 F. J! [2 ^5 V' a! i* R C3 b/ e1 P
called by procedure DO-PLOTS# D$ T9 x, C6 N3 u- A, g x$ e& o
called by procedure SETUP
, X( l: L, u+ T& v2 a+ K called by 按钮 'setup'* w) B2 x; [$ ~4 e- a
求大神解答啊 |