我编的程序如下turtles-own [energy]/ P3 ~4 e4 M1 i, F' X
to setup" M! X0 D* \' D& A5 t
clear-all: v/ }) z7 v+ K% H5 e
setup-patches
5 |% H7 ?0 X, G4 D6 x% O create-turtles 100
4 s/ |# B8 T7 _+ A: i, p& V do-plots( s. b6 A0 B/ ~. p& D8 [" B
ask turtles [ setxy random-xcor random-ycor ]: @% f( J+ A+ Q/ x+ T& c
end! l- i8 g6 ^3 m1 t3 I# h- \
to go7 j5 R2 B- n" t
move-turtles5 a. }3 e% a1 F
eat-grass; X1 ^, k1 _" C# k
reproduce
) W) t* A+ Z. d y5 \. o1 e/ |8 z" G check-death* n' a( M5 V& x# q
regrow-grass! C% Y0 C5 f8 B3 X
do-plots
& k3 ?' t+ g3 y$ y- Gend
6 G: g# v# O: F& m" ?. nto move-turtles
! \" d0 f: Z# ^( R/ X8 y ask turtles [
/ j( d5 I; Z. L right random 360
7 _4 R) Y% b1 F; f+ ~* o- I2 q) O forward 1- I" ^3 x" ] T z, U: `
set energy energy - 1
! j/ Z# E' L4 v# Z: H ]0 r: { J7 m8 f% O
end8 ?3 X- }2 `7 V; g9 Q( p
to setup-patches
+ o( M2 p% H2 _3 k ask patches [ set pcolor green ]
3 q9 c( x9 t8 f1 V: w9 y. a- `end
- q) M5 a1 g( l, u3 Q2 gto setup-turtles
I* ?9 R. O! @6 P) P* O' \- s create-turtles 100+ e$ F5 o% j' q o% Y& I( I2 w) S
ask turtles [ setxy random-xcor random-ycor ]
Q" r) _1 k" O+ nend& ?8 s% q" \$ G& z
to eat-grass. d6 Z& `: t f( L: I
ask turtles [5 H! \# Y6 K) e1 x/ U
if pcolor = green [0 p- D( F' P, `, A1 X/ [
set pcolor black( I. n3 }6 l& S+ C6 A, t
set energy (energy + 10)* p$ G, C2 G; F
]
# p$ ?4 ~8 j0 C9 w6 e$ y. @ ifelse show-energy?
8 W: K% N# Y2 g% M5 A. F7 V" j9 Y [ set label energy ]
8 o2 x) R; y, T; P( a [ set label "" ]* w9 m/ Q5 ^; E0 V# R3 O* P9 M6 x
]: `) _$ O) Z" [& P: m7 D
end6 \5 {9 D4 P. `& J1 d# d
to reproduce* c7 U+ @( N k6 y6 N% Q8 d
ask turtles [
0 R8 g$ h( X# r, q if energy > 50 [* j; M% ]' J& E% [3 \2 f4 ?
set energy energy - 50
9 I: G1 H& E( s5 H4 ~ hatch 1 [ set energy 50 ]* h9 l6 I& p6 S8 I+ m
]: n& \# S1 {) v" [" E: i$ s; |
]
6 k2 G7 d: D0 C2 z; i8 g: i; h8 fend8 \) C u" N# K8 ~) k
to check-death
" I' W2 ]5 N7 l7 x4 ?0 L+ F ask turtles [
' [2 Z" q( v0 ` Q1 }- s if energy <= 0 [ die ]
' n% z5 [& B) c' H9 G* x ]
/ H3 ~1 T2 d7 U* L6 c. Jend! x- @( i" f, v$ [7 n! m
to regrow-grass# ?+ v3 L/ w% p$ {' z
ask patches [
1 }6 }1 E% P- D; s if random 100 < 3 [ set pcolor green ]
8 E. ^8 l8 M! U ]+ @* I! a% b& \4 i& M5 f
end9 p5 w8 O8 _% }& ]/ H( |4 o9 d8 z
to do-plots8 r2 J2 `+ z3 D& `! ]
set-current-plot "Totals"3 s& X9 A" d" w
set-current-plot-pen "turtles"
' m( @8 _4 @9 }& m plot count turtles# J' T" |/ D; G2 k" V% v
set-current-plot-pen "grass"% a4 c% ~' J @
plot count patches with [pcolor = green]
( C H; P# D9 e2 q" j$ Iend
1 m8 h% Q0 x4 @( W( d M$ z可是运行时提示no such plot: "Totals"' f0 c( J2 l" _% b2 K
error while observer running SET-CURRENT-PLOT
9 {/ m1 f5 w4 G8 x% }8 `3 [( _7 h7 x called by procedure DO-PLOTS
/ n8 t9 |* S4 ^* w called by procedure SETUP
2 s& Q7 [; M4 c0 r8 O+ Y( J) L called by 按钮 'setup'+ d& i. G* p- p- k7 x. T0 X! w" j
求大神解答啊 |