我编的程序如下turtles-own [energy]
7 D# B H% G% s4 Y9 |8 R1 Mto setup
, ]- Q( I$ C) k+ M& C. D" U clear-all
0 A* V" C- \9 [: W- O setup-patches1 ^" N+ g7 S3 m8 i
create-turtles 100/ ]! v+ L. n$ k
do-plots
: w" }9 l0 S. W8 @) O ask turtles [ setxy random-xcor random-ycor ]
; ^( k5 w" m, j1 o kend. r: f* h/ b: F# r: l7 G( i, }
to go
4 ~0 W# J0 l( i5 a2 _$ I( T7 Z move-turtles' M {/ y8 d. o" U* h8 s' M6 g
eat-grass
/ L" j: p4 G' _* h6 } reproduce! I$ v4 {; m5 n
check-death/ Y7 z2 p, T7 _7 Y1 |! E8 g( |
regrow-grass
3 a5 U8 F; M, A& V4 R4 D do-plots8 @& K, e# G6 X" H t2 ~' {
end
8 _& t/ Z$ x% @' b; j; c* P( xto move-turtles
. e& h" e9 G" a7 O5 m* U% E+ X ask turtles [) k" e* q7 Y, u8 h/ C$ e: D
right random 360: L5 f& S7 C9 @
forward 1
5 ~' j, g R: q+ e4 l set energy energy - 1
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end
8 `. ^ [3 c c4 U1 ~4 m" \5 gto setup-patches
$ X* s$ j' s' l7 U* K. l6 m ask patches [ set pcolor green ]
; H! B' `3 D4 w- D9 G7 A R- {( yend) k$ F8 A) Y7 y! R* Z) H
to setup-turtles7 D, P- g# {& k8 s# A
create-turtles 100
4 M) }( A6 _% O7 ~: @, z/ x* g/ H ask turtles [ setxy random-xcor random-ycor ]
3 _1 j1 z) N" {5 _# |2 C/ c3 yend
: Q; T. O! g1 Q3 P9 M oto eat-grass' j; b! g1 h5 u% `" j
ask turtles [0 B0 n, y; z8 w# f, o
if pcolor = green [/ q* K/ o `2 w7 q5 M
set pcolor black- z. ]! X: v; ]% Q7 M9 J7 @
set energy (energy + 10)' {8 A3 J# k8 h; T" O+ R2 r$ R
]
9 D$ e& G* ], i/ j# y ifelse show-energy?
& W1 |/ w: a6 h; ]2 S5 o [ set label energy ]
* I- }& G9 M! J8 Q" C5 ~ [ set label "" ]. K* g: w' a2 T5 \: |5 g0 C
]
" x1 |" N, L7 H+ R1 c1 C$ k# p/ send5 d: X7 Z O* n% I! [9 _5 K
to reproduce# w4 H* F1 G+ ?( ]/ t
ask turtles [9 x4 d V6 u( H6 T- Y
if energy > 50 [
0 A. r. e$ ?/ f set energy energy - 50
6 ]) Q% F- `4 U! ~4 F8 I$ B! b8 K hatch 1 [ set energy 50 ]
5 C& u. S' b4 {9 ~+ y ]; W7 D5 h& r5 ?9 b1 `
]
9 |! ?8 P8 i/ ~" Vend
& i0 I4 @) T4 Ato check-death! ~; D6 R' `: G) J0 Z
ask turtles [2 Z( l6 l) H3 \. S& l4 m
if energy <= 0 [ die ]- j6 j6 w' d; [1 Y
]+ `0 _2 L, o4 m& u8 ^6 U
end
& u. c0 y M% \/ F2 @to regrow-grass- w- u4 U3 A4 j2 m0 m& q: f% R
ask patches [* G( n. C" ^: y; n8 r
if random 100 < 3 [ set pcolor green ]0 r' L. B1 M4 O( f
]+ F( v* N0 W3 g0 P5 j: h, z, Y( Q4 d" t
end( |- ]5 k* v& Z- D
to do-plots
. }& `$ J% E! A( S* H set-current-plot "Totals"4 H+ v5 g! x( v/ e
set-current-plot-pen "turtles"0 _. Q# Q `- X+ V$ x Z
plot count turtles
# H, b; @& a$ U2 ~9 ~- C/ \ set-current-plot-pen "grass"
4 C+ a* D5 q- H plot count patches with [pcolor = green]
. \% O! v; h' Vend
- J4 w% o0 Z* N1 A% y; `) F3 H* W( p可是运行时提示no such plot: "Totals"2 _) A* F3 c# ~" @$ `
error while observer running SET-CURRENT-PLOT
. u) z7 p/ y0 M, q8 _2 ]: m5 N called by procedure DO-PLOTS% u7 j/ u7 u- W. `. |
called by procedure SETUP
8 v' g# Z6 G% ^/ T called by 按钮 'setup'; M: N7 `/ x& G9 l4 U1 v- r. h
求大神解答啊 |