我编的程序如下turtles-own [energy]
" a" G! Y' U( c; i$ Wto setup8 y1 p, S. x+ e8 K" E
clear-all0 _7 ]! p% d6 l1 W8 K
setup-patches: Z! r# t5 M8 r: w$ n
create-turtles 100
0 Q# q: Y/ r# W* W2 ^ do-plots
8 E* H7 ~0 f+ U6 M+ {' w4 {4 C. [ ask turtles [ setxy random-xcor random-ycor ]
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to go/ A0 U6 n& |' h) A% ~7 E( }
move-turtles# }( j6 i. G5 G, i% k2 V
eat-grass9 Z9 b( p. v! c2 |/ g3 A* a
reproduce Q! S4 d/ J7 R/ _) ^* p! g3 [
check-death6 h) `6 }. F X, c9 d5 g2 Z9 r( a
regrow-grass
* P' ^# f' J8 n& ]3 t6 P do-plots
, Z' w' I4 D* T$ ~' j) @# gend
8 I2 M( s# }# d) x4 N0 mto move-turtles
o& M- ~+ Z$ r0 J$ \- K0 T0 r ask turtles [
) ?. n8 \! m! a' F3 d right random 3602 y' \2 |, e( q T
forward 1% e" }2 I/ h' \. P, s/ V
set energy energy - 1
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end
9 M0 r9 f, W) O; x" ?! jto setup-patches: e6 o" T z) ^+ w2 s) L6 Z
ask patches [ set pcolor green ]5 w, \% ~3 A' e$ ]" i
end
, r F4 p9 t# ?1 v( W3 U: [2 ]to setup-turtles) X2 g7 l" u2 ?9 X# a/ z: e
create-turtles 1002 j. R( \, H2 Y& p1 O0 n7 P
ask turtles [ setxy random-xcor random-ycor ]
0 t' `- e1 g' I! i2 R2 m5 Iend; [8 x( T% u9 l* Y) b( u
to eat-grass
6 H/ L7 e8 _3 d' W4 T' ^1 ~ ask turtles [( u! I; \, n r- `* _5 q( g4 ]6 N9 C
if pcolor = green [; S8 k. [6 d4 o5 p3 c
set pcolor black
* K5 I2 W; x0 q5 m% s2 v set energy (energy + 10)
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ifelse show-energy?% C& _8 W) Y" Y
[ set label energy ]
( w9 U% N+ s6 ]$ ~ [ set label "" ]
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0 U, ]' i" P4 O' d- j! ~& Cend
' E* K1 c2 w# e6 \# {$ Fto reproduce- h' V+ v% y8 q8 @& v" P( H
ask turtles [
" P4 g$ s) E- ?8 _1 i0 O' U& w# C if energy > 50 [+ D! |: U% T- K( }4 h+ a [3 s
set energy energy - 50
0 E5 Y) L9 S9 c hatch 1 [ set energy 50 ]
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% B7 s3 p ] D( d ]
& ^; v: Y5 } `end( d1 d% V+ A( O4 w# ?
to check-death
$ e1 n6 D$ x3 [' k ask turtles [
, J( G9 Z. q1 }" ] if energy <= 0 [ die ]: y* e3 R; j1 t+ q/ J
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end z0 c! p5 X% b( c3 S; O6 Z* U
to regrow-grass
5 A! |2 S0 Z. w- F6 T ask patches [
* z, U: s( P' ~7 X2 y& a0 q' | if random 100 < 3 [ set pcolor green ]
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end
3 t% o$ ]% o7 L6 Oto do-plots
1 P: ^- h1 } X5 O set-current-plot "Totals"
! x: x6 E3 E1 |: V9 s2 b+ ` set-current-plot-pen "turtles"1 q8 Q9 @+ P1 F S0 i
plot count turtles, j- l6 F! |* s3 `: |
set-current-plot-pen "grass"
. H0 u d3 d9 ? plot count patches with [pcolor = green]
5 x; q, P, O9 n: G" y7 |9 p/ d: A2 eend
. b( v6 J5 V4 \- M* D. A可是运行时提示no such plot: "Totals"
- L5 ^0 Q# z! w3 m& g* J% ^error while observer running SET-CURRENT-PLOT
" ?/ _! L6 e" m called by procedure DO-PLOTS
. `" o* h" ] Q2 M1 P called by procedure SETUP
/ k V) f/ G9 k3 {; G) H E" Y3 T called by 按钮 'setup'
t% N. y5 {0 m# r6 i5 _* R% c/ x求大神解答啊 |