我编的程序如下turtles-own [energy] N" Q ^3 {, z9 V$ F
to setup" V6 N5 z2 X. x$ Z9 r( @/ l- ?, J
clear-all
" d7 X# o9 ^, l5 c( r setup-patches6 x& @9 Q0 p) W
create-turtles 100
% e& L1 ^: h% w, w+ N p do-plots
* n! [! {# w; K8 h5 ?" T ask turtles [ setxy random-xcor random-ycor ]& y. ]7 R4 S; O8 I6 [
end
+ l) B& Z; r8 T$ \- x0 Fto go
( V6 l- ?8 A! N1 G' l9 h move-turtles6 K4 j. `8 {+ z0 n( o
eat-grass/ l; ~5 x" o' M) D" K! p
reproduce4 s3 y/ K+ H7 b8 s
check-death8 E+ g) _. R, q! z
regrow-grass# z: w) T0 S) v Z( {0 C
do-plots' o; _7 X( l1 Z) H1 f* h3 q" U% C5 E
end
1 S8 ~& q y2 c8 @to move-turtles, T! }6 ?' D% |$ f, M$ W
ask turtles [$ L3 G, P. ` i2 Y
right random 360
9 [. J2 B Y- `1 e, t forward 1
7 q) R8 W/ |- V( ^* O! G set energy energy - 1
; N: W$ {! q$ m2 P7 ? ], o4 ~: b" F5 X/ t% C5 m7 f0 m; X; A" q
end" O$ {7 Q9 p+ e; T3 G4 `
to setup-patches) r+ S& \* _- R
ask patches [ set pcolor green ]
. k' L* B# Q" `" }# L- `) d! J3 T5 Zend' X4 h1 ~4 y& O% W
to setup-turtles
" W/ T, ~/ X( M+ p% W4 T create-turtles 100, x. U9 v2 l9 k7 V4 E% i
ask turtles [ setxy random-xcor random-ycor ]" m+ v; O) e6 z4 @1 z `
end
; I$ J8 w" v5 W4 E4 V+ |0 _- [. dto eat-grass
* E) f: D# A0 X% c$ k; ~7 Q ask turtles [
: R0 \5 U/ }* v& g" r: K if pcolor = green [
9 B' r- f$ S, u7 n set pcolor black
! z, @0 x0 {0 e# f3 e! e- ]" H& D set energy (energy + 10)
2 ?2 G1 z- _0 D2 x ]. ~, d8 K# v& R- g" m3 \! `2 W
ifelse show-energy?1 F- R }' \$ {
[ set label energy ]
2 R4 @3 @9 B- q! t H [ set label "" ]
) P! @# c3 S: Y" r! W% m0 V. L( U ]
3 E. T/ q. a, k: x1 uend
3 V9 B( ?5 w; S$ R: q* t* L) q; y8 nto reproduce
+ i1 I: {, A2 T8 U z ask turtles [
2 x6 j# h# ?) C if energy > 50 [
2 v. t4 Y0 H# j5 d2 v set energy energy - 50
- A7 {2 i- z w4 u hatch 1 [ set energy 50 ]
2 w- N! ?8 H/ V; D ]
* n- o# p1 f. r( Y' N9 p ]) k: }, x- |; ~: |3 b
end0 A* O/ Z' D# n" A1 h0 L6 V
to check-death1 t8 d9 r2 z3 }
ask turtles [" s3 h$ g c+ p% K; @0 E
if energy <= 0 [ die ]
* _0 B6 T0 I) X/ F# T! Y ]8 D7 q# G, a' B
end# L5 u9 C/ i* b, J( t
to regrow-grass7 ?2 m6 ^" a/ i% u
ask patches [
2 w1 d. I* N( X# j2 X% o& U( E if random 100 < 3 [ set pcolor green ]
) s ^. M! [) _0 k ]
! }" s7 z& R! t# v, {! g1 Zend% p+ F4 d' @& S! N3 z. f! Z
to do-plots
M; ~8 x0 P7 R0 N* Q F! Q0 J% ^7 ], d set-current-plot "Totals"
6 a' D9 ~. X5 \8 d) w set-current-plot-pen "turtles"- B- y9 K$ W7 }1 E/ m: c
plot count turtles. b" z7 H+ `* y6 n
set-current-plot-pen "grass") Y5 `& \' J% ~ D2 c2 z+ \0 Q
plot count patches with [pcolor = green]( w3 G1 n% q9 J7 m5 E! u
end
1 U' G5 B0 w! E5 X. S# q, Y \可是运行时提示no such plot: "Totals"
# f" U# g6 y% l) eerror while observer running SET-CURRENT-PLOT( W1 B8 O- C3 v& ^
called by procedure DO-PLOTS
. ~" C& y0 J& s; X5 P0 ] called by procedure SETUP
% z& j$ P, R) f4 b3 S called by 按钮 'setup'/ F8 a8 [" u. f( q$ R; a: v. ~
求大神解答啊 |