我编的程序如下turtles-own [energy]
7 y) [5 ?* Y* t7 g1 `$ C# G1 Ito setup
/ Y: {, w- N2 ?8 L( }% @! o' S clear-all: ?* z! U) t- x4 Q1 @
setup-patches
N h* H; j" B' x' e% O create-turtles 100, _. A: }, L2 m6 h: J6 F
do-plots
5 y- \& Q* Q+ O6 t( W ask turtles [ setxy random-xcor random-ycor ]4 t3 ~2 ^6 [5 i+ y7 p" Q: `
end/ N' @% }0 b6 v4 J* m/ h2 V" R
to go3 b h8 Q) P# S8 H( g! A5 @; m; K/ [% h
move-turtles3 L- ^- a2 n4 Y% b4 p8 k6 D
eat-grass
) n# B9 S4 h' Y6 ?, o: o* R reproduce5 E6 O; N8 i, o
check-death. L- e; c6 Y9 n8 q! o
regrow-grass
2 T+ h7 d$ u9 K, M& ^1 x7 N$ ?" N do-plots( C* q3 V m8 A* N4 p+ f# _
end
* {% u6 x: K- v( \3 _4 zto move-turtles# I* X5 k& S, _. `
ask turtles [
) C# N7 |! E% Y& l. M right random 360$ y: ]' X3 ~) f' S" e; i( N
forward 1
* v5 A2 R' J8 M a' D) w set energy energy - 1
5 Y; W7 D1 G& v i/ T ]8 Z% V& t+ m8 _
end
* j; U3 x& i4 g) E- U6 `to setup-patches4 ^% K/ Z4 z) p3 O+ ?# H, S8 y
ask patches [ set pcolor green ]
/ D* C! g; I) p: m) T) j: Tend' z ^2 f+ |3 I& O0 ~& \
to setup-turtles
! w! _) A/ B/ ~- S create-turtles 100: C+ _/ }' d8 u. i8 T* J
ask turtles [ setxy random-xcor random-ycor ]
0 ]5 ]" F u' g: Pend8 B! B" e# Q1 H; h: N6 D
to eat-grass( p7 a S0 ]' G% c/ ^
ask turtles [
" J& B% E3 V9 u( l, h if pcolor = green [1 Y# G* C, h7 z! Z, }
set pcolor black
6 ?! K& J( K4 L3 U1 G! d set energy (energy + 10)
, {6 M; j! L" L0 W R0 i ]
5 L( r1 F. P) @4 D7 b ifelse show-energy?" t% {1 a; W( Z" N; t: I$ o% ~3 l& p
[ set label energy ]
" v3 q$ ~' m1 J' t7 \" l [ set label "" ]
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end
+ Q8 ?: |6 v! I% n$ [9 Fto reproduce
9 D; m4 D" O; O. T6 Z9 ^ ask turtles [
& `( _+ Q6 {. A, G5 {, s- ]; a8 g if energy > 50 [; S1 C2 `! N W" ]& I3 e( h
set energy energy - 50
. H( x6 n4 l+ I3 K/ T! K hatch 1 [ set energy 50 ]
* q% I& o. m1 h- R* q" ~' M ]
/ ^, L: t" t! C; y: M8 {$ |8 E) S ]
, g# |' z# n5 A: zend( `; l' v! y( j: V! h& K
to check-death
& Q- @1 b f- T6 } ask turtles [
. r' i4 Y' R4 x- o if energy <= 0 [ die ]. |7 R4 v# _7 u2 w
]
; |- |/ i4 s. m: tend
8 p4 s% W8 E: Q. [1 Fto regrow-grass
6 ]6 v" }# c' R! p ask patches [3 V; ?3 o/ j* R1 \6 k
if random 100 < 3 [ set pcolor green ]3 J) b) g3 q( M! g+ `/ o
]
8 i0 p e0 Y0 A6 l K+ A5 \1 Mend; Q$ m4 j* x' c
to do-plots
- f+ \8 W4 ~! m6 X3 x& T set-current-plot "Totals"
, k: L. e; c7 c* S& M set-current-plot-pen "turtles"
" C$ Z; O* `6 v" G plot count turtles5 H1 ]$ x- S! U/ o% n
set-current-plot-pen "grass"
9 | S% w% u( H4 }- ` plot count patches with [pcolor = green]
2 N2 I5 x& U6 X" m; p3 g) {+ Q& Aend; U/ s8 a' G2 q/ E6 H2 j+ q8 x
可是运行时提示no such plot: "Totals"4 E* r; \; A0 D; \" L& x& Y, X
error while observer running SET-CURRENT-PLOT% C* G+ E, Q0 O3 Y) @0 k, j1 w9 B0 e
called by procedure DO-PLOTS6 n" _3 Q+ d, b) B" d
called by procedure SETUP+ l9 J5 g2 Y% ]* N* C
called by 按钮 'setup'
: ]* O F% x% e) E+ m求大神解答啊 |