我编的程序如下turtles-own [energy]
% R/ z; S* Z4 n* Q4 E1 mto setup
" h0 l. H: D) J2 w8 c4 ~ clear-all' r. W1 P7 Q* n2 E& e
setup-patches
- g4 A7 { r+ w5 @; W" r: S0 d create-turtles 100
9 \$ T% j! G" \$ |! [/ N; ]# J do-plots
6 r2 m l8 }" a ask turtles [ setxy random-xcor random-ycor ]% d' `- A2 {" ]& L. H N: r) \
end! V ?/ `: x( Q/ q
to go
4 V( j" `. y) H1 `1 T move-turtles% d; n+ V1 ?" N
eat-grass
5 |0 U2 z2 @! l0 u8 S K# V; J reproduce
/ z! D, B( H9 A+ Q7 F6 d, D check-death& j3 E# F7 T* S- Y
regrow-grass% ^! Q" F5 T' x; @/ O
do-plots
6 p! ?* k3 H/ }6 o; ?- x6 X( U. @end
( @! L( N' M' c7 l6 Mto move-turtles2 [. W; R" a9 _% X$ P/ e
ask turtles [5 [& p/ B+ o) y- A0 w# O
right random 360: k3 H/ o G) w7 G- X5 E: Y
forward 10 @3 K2 {4 l4 Z0 [2 V1 V7 d; S
set energy energy - 1
# w; b7 Y: w, ~4 t2 b ]# k" T- l( w! z2 h! i
end
6 j- p8 M9 Q, \' F1 G: rto setup-patches2 b8 P: `6 m+ A
ask patches [ set pcolor green ]! E! |7 Q3 I8 f# k5 {
end5 _* N# K4 y) {% E, F
to setup-turtles& Y4 y; X5 |- W5 o3 i, m, C% M
create-turtles 100
' C( ?& v# y& D; r ask turtles [ setxy random-xcor random-ycor ]
0 S: {$ Z9 B1 Y3 B- I6 |7 Gend
/ t; p" P& ^8 ^8 yto eat-grass5 c3 p" m. s4 s; _" ?) ~
ask turtles [
5 d1 z4 I2 i7 P# a' H/ J if pcolor = green [
# X, m2 \! Q9 k9 U) _ set pcolor black# q' t# t6 N' E/ L
set energy (energy + 10)+ w7 g# k* T; o, g" V Q% l
]) D" V0 ]1 ~2 } T
ifelse show-energy?
u F% Q9 C4 M5 \0 W [ set label energy ]
8 E$ \ g; t+ \: R/ @: ~ [ set label "" ]
! Y, j, I7 K B( t$ v8 @; U ]
% m& b8 y7 N0 C; i9 k; g8 Tend/ D" u: F# P, ` W# \
to reproduce- u0 \: h) ]; E- O5 {
ask turtles [; m2 o4 p; R8 y( a( G- _
if energy > 50 [$ w7 C2 z$ Y* B' k' u; ?. I
set energy energy - 506 P* [5 `- l) _) u
hatch 1 [ set energy 50 ]
; h4 M# A% A8 V) L6 G) C ]/ T9 X3 @2 u( r( R) K# R
]# g6 ~7 D. h2 k5 l8 \
end
1 C3 s5 n; h# I T* cto check-death9 f7 N, p6 V M% i5 z% g8 p
ask turtles [
6 q3 i) ?, ~. D0 c4 ~ V% O if energy <= 0 [ die ]/ J! K; V X! j: k7 y; e- k9 a
]) ?; p* K9 v# G+ M9 M
end9 W7 R& I( P9 H4 Q
to regrow-grass& k6 r- f$ D p U3 m6 y6 t: x% i+ \
ask patches [( `% L/ _0 N( U) J8 T
if random 100 < 3 [ set pcolor green ]0 g- k6 E8 u4 C- v% O, O# t' {
]) \2 L+ `& n2 _" }
end
. g, k& q( |0 s( R: Z dto do-plots
! V8 D# w" g- y( x Y) Z: T set-current-plot "Totals"
2 v7 i/ c! ~/ z5 V9 @ set-current-plot-pen "turtles"' V/ w+ d; s' V0 i Y! b
plot count turtles
$ ^* G4 i' @4 B+ J8 A set-current-plot-pen "grass"& t( F7 u* |& }. l! ]) _" z, b
plot count patches with [pcolor = green]
) O0 ]+ U6 E$ s( R1 Jend
) P( H' z @4 H1 N可是运行时提示no such plot: "Totals"
) ?- w; a8 M% Q' v. V: O* |( a: terror while observer running SET-CURRENT-PLOT% u. [) T! [9 Z7 c9 \9 r3 V
called by procedure DO-PLOTS
( k1 h: \2 P' v, L2 ~ called by procedure SETUP l& l$ g( `% @
called by 按钮 'setup'8 M0 m* W' D& ]7 Z
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
