我编的程序如下turtles-own [energy]3 m# A6 S0 Q. U) v2 H2 R3 t! C
to setup' L$ |% m- G, D( m1 X
clear-all
: Y; a! ^% {2 i$ z% o$ F! F* C! u setup-patches
. Q4 u/ Q6 H$ \+ Z6 E: p' X create-turtles 100
2 B9 O- }8 |$ ?7 S2 Z; N do-plots
# t! g' [1 E% j7 ^ ask turtles [ setxy random-xcor random-ycor ]( \' [/ A- K" W, y. z7 z
end# i" O' d- `0 z! r
to go$ R0 n; Q& R; o& _9 u
move-turtles0 Q$ w5 G; ^9 U( n
eat-grass
6 c G X2 Q1 M4 g4 D. @0 o reproduce/ ]8 D& ^) M( }6 D5 t
check-death! S' |6 ~0 [, f, q$ M# D
regrow-grass6 L# v* B7 N9 M
do-plots( i+ F5 }( r: J" J
end( V; k4 o1 B, w0 K* B
to move-turtles5 o4 U% y8 h( @% V6 c
ask turtles [: j2 C: `5 J7 [- `4 W* {7 s b
right random 360
, ~6 I4 Z5 d1 }" }; x7 q forward 1; } |7 D. |: k' u# E% i
set energy energy - 1
9 y( ~2 n9 l4 N% ^$ ~ ]# E8 i2 w1 p; s% ~
end
* n$ D9 M* f! H9 l& Jto setup-patches
% P% R4 E' l7 y0 O8 n4 j3 ~+ S ask patches [ set pcolor green ]
" }0 `# y) Z1 r- j3 wend
7 A, W V8 E# O. J0 Oto setup-turtles
: R: u7 b( I# b" U create-turtles 100
4 u/ O0 c @7 p0 R9 R( ] ask turtles [ setxy random-xcor random-ycor ]
0 e" ?: f, e6 a. e m* d) eend
4 t0 V+ W9 t! h/ l3 Q \to eat-grass
; I- |7 ^8 q# e E! n ask turtles [* E; [& t# i; w2 D5 @6 U
if pcolor = green [+ e5 U# ~% f: a. X" a) X
set pcolor black- i' t' C2 C& v" k' P5 S
set energy (energy + 10), ^8 o2 C& X/ H, O
]
' X7 M8 W& ?9 h% A6 P ifelse show-energy?. K/ \9 H, L( F+ U
[ set label energy ]& W r2 R! e* p" J! q
[ set label "" ]
4 |4 s6 i" v- [8 e6 S1 l ]! h+ T7 Y. J0 S9 ~
end) m6 v+ C# ^+ a1 k8 \
to reproduce/ ?, i) k6 K5 v, g
ask turtles [5 J* D* r3 ?6 e/ c3 S
if energy > 50 [$ p$ F1 R) A5 R/ w) g
set energy energy - 50+ [! V8 f. t0 s, u; f2 A
hatch 1 [ set energy 50 ]
- u) X, U! `3 Q6 \& c ]
+ T6 v( Q& m8 _) l( P ]
& \- \7 a, e0 o* m% rend
, F- {% P9 p0 I" `to check-death
}9 U' J/ k3 W7 g h& S ask turtles [ N' w8 g2 g+ T# L
if energy <= 0 [ die ] y$ ?- @3 }8 s! X
]
& k( S0 s9 `, n( k2 xend
/ `) Q E z/ |! Q0 @( P/ O& Y) ?to regrow-grass
" K% \2 n0 E5 K ask patches [4 ?" ^0 x" @6 v7 e0 P8 q" n" U
if random 100 < 3 [ set pcolor green ]
, b7 S/ p' _4 Y& g# Q7 } ]$ V- J* D* \1 O3 `6 s9 a# y
end$ ~9 H9 _! z( }) Q0 c6 ~" J
to do-plots
: F. s! M2 V6 @5 a( Y; X$ u% f set-current-plot "Totals"
7 c+ E5 m" r/ W$ l) } set-current-plot-pen "turtles"
! K. s# R8 u! M' h' c6 F plot count turtles% j8 Y& r( V8 p3 U" Y' ]1 b `
set-current-plot-pen "grass"/ U3 g- i3 M1 {& H# l' F% {
plot count patches with [pcolor = green]% H: P7 Y- c: @. p, q
end1 z# u6 c; }' A) M
可是运行时提示no such plot: "Totals"
. `% F" [$ P' ~2 serror while observer running SET-CURRENT-PLOT
: _$ N' D7 t% \% d called by procedure DO-PLOTS, ~% i6 I0 F w% U
called by procedure SETUP1 y- Y# h1 }+ h$ m0 L
called by 按钮 'setup'
" K0 K7 y7 F0 R5 f" D. U+ C; g求大神解答啊 |