我编的程序如下turtles-own [energy]
* O1 l: i, e: }! }$ G" ^3 R9 [) r nto setup
D( K7 D" x& d$ ^2 n+ @8 P clear-all0 |# c4 D/ A' ]2 [& V
setup-patches3 A( y; n' O8 a3 W: A4 t6 w
create-turtles 100, y9 n. l/ A d1 |/ {
do-plots
. Y! W6 `2 X4 `. C" M! @5 a ask turtles [ setxy random-xcor random-ycor ]
' o0 L0 Y J5 t1 w: W) ~, d, kend
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move-turtles- A1 L( ^( k; }. o0 v
eat-grass
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check-death
1 f" E7 \. z+ x* C, j G regrow-grass
! g1 M9 j5 d) Y" H% r do-plots, k' L& Z6 {: H, q
end! M5 |. M. _" s' `/ ]- _$ f$ _
to move-turtles& m$ O0 r9 p: j9 F8 J
ask turtles [# _( J/ [- {% d: P4 H! L
right random 3602 x' @1 x; d2 U X6 h
forward 1( V$ O% m# [- e; @1 y
set energy energy - 1
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! A( {3 i6 W y+ W1 fend
0 O" }# Z. h9 C- \. ] r' P! lto setup-patches
- c( i# o3 s7 D6 @9 F ask patches [ set pcolor green ]
) C _. N; ?2 Tend3 ~$ f! {6 |( I. G
to setup-turtles
6 H: `; A4 J8 A9 N5 \( { create-turtles 1001 M1 _6 F( @! X b5 Y# L- @. \/ ]' [
ask turtles [ setxy random-xcor random-ycor ]
6 {9 o* J5 C) M+ _+ Pend! d+ \4 [, T4 d9 H
to eat-grass/ z6 k E+ q# f: ~' V9 G4 m
ask turtles [
# h8 ~ }3 Z2 g- X if pcolor = green [/ I Y3 b+ @; m- D l- ?- _* d& t
set pcolor black# b2 v' s% R" O/ A! v& M4 G! i
set energy (energy + 10)
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ifelse show-energy?9 f. |- Y5 b% x! X
[ set label energy ]: X! Q4 H" ?( R# i1 Z; }; Z. s- V
[ set label "" ]
4 G2 y9 y4 J6 W& T$ k ]
1 z: c- M# g# W" n8 gend$ N, r3 O' k& k6 t; H( [
to reproduce
( q" A( n7 G1 S3 v7 N ask turtles [/ j$ V; p) z) q4 S; w
if energy > 50 [4 t" H2 J- u- S9 B1 f5 m
set energy energy - 50
4 c0 Y' }& k& I4 r# m7 R8 i hatch 1 [ set energy 50 ]4 n0 a# q1 }- r7 V) v$ G6 h
]4 v) j" T; s) ? h
]
- I7 v2 r$ L3 j. D- S1 |" n) Kend
( }9 @$ e; v4 M( O8 Mto check-death
! {7 ? T" x- @8 u' `& _( ~$ E$ a ask turtles [$ w8 k/ A, f: ^8 [! ^
if energy <= 0 [ die ]
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|& }# N; x: l1 u1 mend
% g5 y0 ?# q3 o& Lto regrow-grass
3 o* u& Z5 [6 S0 S8 X0 d, _% L ask patches [
2 D' D* R! \: G: z3 I+ F if random 100 < 3 [ set pcolor green ]# b, \, E0 p2 l0 J* w7 j
]5 Z3 y2 ^8 F+ x! C1 z& D9 l" Y
end b' F9 J6 p# \: j. x( H: X: V% i
to do-plots
7 d' R9 E. |0 d3 s0 q( U: w" E6 { set-current-plot "Totals"! A6 x' U4 Q/ _/ M
set-current-plot-pen "turtles"
& j; o& \8 [9 U9 D& b! a plot count turtles/ G X! ^3 ^4 r& ~
set-current-plot-pen "grass"" O/ P4 {, j* E8 U A' l3 A
plot count patches with [pcolor = green]: O7 ^ V9 a9 y3 Y6 I( o
end
" K& l% T& d8 q0 W5 E$ M1 z; v可是运行时提示no such plot: "Totals"
) W4 P2 @, j' V& X7 ferror while observer running SET-CURRENT-PLOT
9 \7 M7 x4 t. }& p: F: m called by procedure DO-PLOTS
( c9 [; o9 k' v( }( Y$ B called by procedure SETUP0 @3 s5 I- ?. ]7 B9 q
called by 按钮 'setup'
- m% j) r! u+ v& c% u5 z' R! }求大神解答啊 |