我编的程序如下turtles-own [energy]: Z3 p; N- Y* z$ I) \5 W) W
to setup; [; m6 I5 e- K d
clear-all
u- s [) b# h9 W9 n setup-patches
+ d4 g: p, f9 Y' R% i; A create-turtles 100) g& @) ?+ i7 b# s8 v
do-plots
+ w) C) y7 N0 m% O) d ask turtles [ setxy random-xcor random-ycor ]5 V. h8 \* u3 v# A" H( E1 ~, J
end3 P; w' s* m; y) d9 ]# v4 Y. Z
to go
2 p- o5 G/ o1 B1 T- b6 U" z$ r move-turtles1 g9 S& C( d( h; E3 d) }
eat-grass
2 { p$ t Q$ @ _ reproduce
; w0 ?, X& x( Q# E2 X) K L+ u check-death
$ U/ a7 j! n( O7 \ regrow-grass% Y+ }+ Z( f* A7 p" t' P
do-plots
: S: I( S7 X0 J7 S% T1 [6 c" M6 I) }end: I3 Z: \7 l0 W" ^: y: j# ]5 {
to move-turtles
1 Y) _* ~1 J( h) P8 B ask turtles [
+ G* g" ?2 K- \0 S right random 360* p5 T4 A0 B7 r! \
forward 1/ k- D; H. t9 U! t" j( E$ K& I
set energy energy - 1
0 E; r* o& F7 X ]
% H" e( l5 u4 Y9 d( a5 kend+ r" v0 `7 X2 T! H
to setup-patches
; J i [5 ~. h0 h4 d5 i ask patches [ set pcolor green ]
( a5 M4 V0 v5 X+ _! {; tend
# n; t: P; ~4 _# r: h7 Eto setup-turtles
# t! k; ^! A; F1 ~2 A1 O create-turtles 100+ E0 ]+ X0 B* z* `6 ?
ask turtles [ setxy random-xcor random-ycor ]
9 C1 T' x5 l h! M3 ^* J8 q+ Cend
- R5 C& o2 z- m* Y; dto eat-grass
c; S$ z( m) p/ { ask turtles [
$ `+ @" z8 X7 s L/ u* O if pcolor = green [# y1 t% s4 q" X: {. j$ X' g
set pcolor black+ X4 h- n9 X' f6 X. Z. ?6 y( @' w
set energy (energy + 10)
0 k1 i' {" N: w6 A5 U7 w: i ]
7 D* m, x3 C) C0 M ifelse show-energy?
% c6 I# ^' @& z" Q: e [ set label energy ]. ~4 \- T; |9 A0 j7 L( v2 ^8 M/ R
[ set label "" ]/ u. C- @: q' p) ]
]: L [( o7 `$ i) ?9 j6 |* u; f3 O" t% |
end" f9 ?* K/ r! a2 \; \0 B4 T
to reproduce d" O5 s( ^; t* t3 q
ask turtles [
1 t- x0 ~5 t( `" P; S4 f: G! _ if energy > 50 [) ]# }0 x: P! f+ |" x
set energy energy - 50
+ R! K% t% z& l$ Y) v hatch 1 [ set energy 50 ]
$ \! F+ G2 _5 S6 P. N ]7 @! K4 |6 Q# G: n. I7 D
] @" P3 Q3 D0 F' H- y7 P
end3 a$ x! Z- |& f8 P
to check-death
& J' a' @; Q, Y" u$ X ask turtles [) ^0 t( C& l( \% {( {2 b: w
if energy <= 0 [ die ]/ d5 l1 B8 j6 w& {: z9 B
]
( P! {; j3 l1 k) G/ S: N$ Oend
+ M6 e; H7 d8 u! O* v) pto regrow-grass- \5 s( ~* l7 g
ask patches [
) a# C- L) g' K; i- [1 o: c4 H if random 100 < 3 [ set pcolor green ]$ C& ^: G" L( ?, |! Y
]
/ I, d0 i3 Z; C3 Hend
0 w/ T. u! H8 p6 o# lto do-plots* g% {3 D, p. [; ?. B$ u& a7 R9 K# Q
set-current-plot "Totals", z ^ _4 ~- j$ n1 |4 o2 x! ?' X
set-current-plot-pen "turtles"0 P( z: t8 C8 f# [. M9 t
plot count turtles
/ {! F' j/ I) t) Q! p- A E set-current-plot-pen "grass"
) m: z5 {$ ~: N3 m plot count patches with [pcolor = green]6 e) w; G- I }) i$ ^
end! V) C- ~4 @% E5 W3 ?
可是运行时提示no such plot: "Totals"- ^" c7 a* @8 E' A
error while observer running SET-CURRENT-PLOT
+ A+ d3 ?. u1 P' [0 u called by procedure DO-PLOTS2 t7 o I! |/ z; {2 D+ j J
called by procedure SETUP2 p: ]+ l$ U3 h! f. ^
called by 按钮 'setup'6 I# h4 |/ [) o* u& i( |3 U% K* n
求大神解答啊 |