我编的程序如下turtles-own [energy]
+ U5 r3 g; P% X2 U& |: n: ?, v+ Kto setup3 v( e! O5 i( t0 L3 E$ Y+ x
clear-all4 P% }* f9 `3 [6 P' Y" Q
setup-patches
" H1 q' l; n; v create-turtles 100
& @" h% d2 t# S, N do-plots4 [ I3 i9 u9 x, e+ o; p" `
ask turtles [ setxy random-xcor random-ycor ]
0 g3 B, @* b& r" k. eend
7 u$ Y) U% v$ ~! e2 Yto go
+ W( F- k4 X" n4 Z* { move-turtles
$ w% S/ x7 G1 Q2 f) @1 D2 a* T5 r eat-grass L K. x0 K* M ^: f% t
reproduce7 w, Y4 T) [- M! Q
check-death) r8 G0 C; Y, N
regrow-grass! b! O3 x: X4 M9 P( p7 I8 q Z
do-plots) c2 V- m0 `9 ~1 D/ x* n% Q
end
( P, i* i# ^+ j4 Yto move-turtles1 b6 U& r0 G3 q1 h' i8 D
ask turtles [
& Q1 T2 c6 n5 [. n8 |+ S7 h* P right random 360
# ?6 `( _- ?6 A- C" b" @4 Y. H4 A5 I forward 1
4 l/ T% P H& D set energy energy - 1
7 [8 M: |0 n: l7 O& } ]) A5 N% e5 h9 D
end
; Z5 f5 Z& W Z. c! u- \to setup-patches
/ Y5 N& R5 T- \, Z+ a ask patches [ set pcolor green ]
" j- y+ ~ M3 j% U0 ~2 s2 N/ dend
2 `, X& e+ o1 d1 ^6 B1 f$ ]4 ato setup-turtles
/ Y- @- X* b8 V create-turtles 100
. P* l$ l0 L) g* J' e' @+ ^ ask turtles [ setxy random-xcor random-ycor ]! Z, L c6 t" U D+ w& O! Q/ D
end
3 `5 X, U, o/ K1 s1 rto eat-grass
* O7 j* m! U) \7 D2 G0 ? ask turtles [
9 S/ F. U2 n9 t: e* T6 Q0 H( r if pcolor = green [
) O- J G) R; u; L set pcolor black
! C6 ]7 @* @- y' U set energy (energy + 10)7 A! D; U7 d, s$ x2 B& O: X% ?2 }$ \+ {4 e
]; C9 z/ O# Z5 ]2 T+ [5 ~" `
ifelse show-energy?4 O/ n3 f h; M7 E: Q9 j$ W
[ set label energy ]4 a$ `; k. ?( e/ U
[ set label "" ]2 M' z! h' l9 n$ W6 g$ E
]
* b3 i. A2 g& Y" X- [* I8 p& Z1 fend
3 V# v- D% y" f, d2 tto reproduce
# p6 ~: {$ A6 H* f. O ask turtles [
0 C& q2 X" c b if energy > 50 [4 w% C9 C: O! S9 j
set energy energy - 50/ S9 K* H: y6 t" G: v' }5 z' T! R4 M
hatch 1 [ set energy 50 ]
2 D. ]# ]0 e0 n ]
) u( r, s- ]! }. N: E ]2 x: [' Q5 ^" N
end9 c% K# z, N+ [1 r
to check-death/ {# s# v% }5 }
ask turtles [
c8 [, L' D$ H* S. ]3 B& |. ]8 A if energy <= 0 [ die ]& ~. M) h- o0 s2 S( ^. q
]
% \4 S- k: B8 [+ Zend! k# s! g. n. R
to regrow-grass
! m0 n1 x. N+ Y, H' w) s+ e" G6 c ask patches [
1 k' ?, w- L. D4 s* m if random 100 < 3 [ set pcolor green ]6 K8 r. _/ F1 j: ?
]
- X* L( i: d$ }* Bend
. u8 H$ _/ E3 h* C- tto do-plots1 n d; Z- Q. q$ D) \! ~, j
set-current-plot "Totals". q1 [" U- T& N W7 n
set-current-plot-pen "turtles"1 w' o# Y* {0 W1 C
plot count turtles. D" ?2 t# N4 d8 \: ~
set-current-plot-pen "grass"* R7 W" ]" x- f
plot count patches with [pcolor = green]
" E5 {" @( a9 ^: B( E( p4 b1 mend
8 T3 N0 S. a+ x' C7 V9 D可是运行时提示no such plot: "Totals"
+ G+ |- C* R& {, ~6 u5 l: \2 |0 eerror while observer running SET-CURRENT-PLOT
1 q. |" k# ~: L4 F$ x @ @# g% y. L5 k called by procedure DO-PLOTS6 R S* e5 l2 E6 \- G$ ]1 O/ S
called by procedure SETUP
$ c. N5 c/ }, N& N7 _ called by 按钮 'setup'
: [* w2 i/ ~1 d4 v求大神解答啊 |