我编的程序如下turtles-own [energy]
7 D* S# g6 u2 |' Y/ o3 X' c* hto setup
' T4 V9 p( L2 r! \1 t" |2 |) f% G" ] clear-all
4 l$ w! N, w) V c1 a1 | setup-patches
8 w0 e% A; D$ W% N& ~ create-turtles 100
" Z8 a- Q4 g9 z/ r& J: a6 K0 r do-plots% X% V( b5 {& l; o9 N: n# q/ I
ask turtles [ setxy random-xcor random-ycor ]
& J$ ^) N3 c0 b* cend% q( G, z, r4 l& q+ J! a0 v
to go
* D; A: o% B; X- e9 w4 _& Z8 f: x1 A move-turtles- P ^9 l5 Z& q
eat-grass( @/ K1 I; o, u7 Q/ F" V5 v6 r
reproduce
5 U% P8 s- m& @ }" Q* a. U check-death
6 Z$ n- ^) @4 Q" a% q9 |8 H regrow-grass
6 a! R2 ]! L8 L; J& C) [ do-plots
- j- F* [* }* _' b) O- jend( F4 f2 ~" L+ ~
to move-turtles C' j' H( T0 A( h: p( l
ask turtles [$ [7 z B5 g- e" U$ X0 V3 I6 A x7 R
right random 360
: A1 p9 L/ g' Z* b forward 1
. K& g4 B5 J) f6 V) x5 p; i$ Y* q set energy energy - 1
0 F# s# Q# d7 [8 I( ?; R2 | E ]
% m L' C6 n( r z+ Lend$ q8 l/ U2 P- I" f9 b9 i+ l" I
to setup-patches+ p- H% g+ Q0 c
ask patches [ set pcolor green ]
: Q) S: H6 g/ D0 kend
5 B- T$ x2 k) R' i2 Q1 x% e& jto setup-turtles
: G* d @9 J: l' {4 E" M+ b6 k4 a. d$ N create-turtles 100! o0 \, K$ s5 m! B6 o9 G r: U( }
ask turtles [ setxy random-xcor random-ycor ]& v. y8 |& b. f, O! ~1 M% v, F. Q
end
* [4 ]4 y! h6 M8 t/ k9 ^6 xto eat-grass
1 K5 L' ~0 y5 g! e M ask turtles [
; |+ q0 T, X& D if pcolor = green [- U9 s' M* m& g- K2 @, z. y' s9 A
set pcolor black: z, W; Q1 A& H- i, q3 K
set energy (energy + 10)& S4 T! v8 h9 |2 l: N2 w
]
2 j8 V' d3 h# q: k ifelse show-energy?8 U& N9 H0 X0 I$ n( d
[ set label energy ]% I* {+ T# f/ l
[ set label "" ]
% u! r2 y5 R% B# ^ ]. Y5 W4 D; w' N* V7 O
end
6 K0 M+ [4 n i2 U* I% \to reproduce; l" Q U, J8 M1 t8 s: w
ask turtles [6 q& n" y4 b3 _" T0 `' s
if energy > 50 [' J0 T* K6 A3 }
set energy energy - 50
" U: u3 k( K6 s" ^3 B: a/ ~ hatch 1 [ set energy 50 ]
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]; X: v8 N9 {+ w% o( v
end9 O* M4 L+ e4 O z: i
to check-death* r) v7 ?; L. M6 Q9 W: P+ Y
ask turtles [: x$ h# L: q1 F w1 Q4 W7 C
if energy <= 0 [ die ]
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end$ C1 J2 J! @! V8 m
to regrow-grass5 `+ G8 m! e# `& Z3 k, a! M
ask patches [ P) ~ G x$ {' Q2 [. {
if random 100 < 3 [ set pcolor green ]
2 \9 X9 p! } G0 y8 _, x, w7 W ]) z; u s. n" H: z( @
end) r. P0 E$ S4 x* D
to do-plots
1 g4 s+ ]5 C! y8 s2 p$ f \! Q& c set-current-plot "Totals"8 s+ s/ p& P& R
set-current-plot-pen "turtles"5 W) G1 Z$ L% y
plot count turtles, `; x6 [2 x2 U6 Q% p5 S
set-current-plot-pen "grass"
5 L1 ~- R+ F% g9 E$ | plot count patches with [pcolor = green]
8 A- q9 e* D, ?* R4 G# U3 k! a8 hend4 K/ S7 T0 {, S% W4 I1 S) j! O
可是运行时提示no such plot: "Totals"
: B) I% U# y" I! B1 ~error while observer running SET-CURRENT-PLOT4 ^& W8 M6 Y$ c7 w: o5 A
called by procedure DO-PLOTS3 v8 W2 P0 N6 s8 M5 |6 g3 \( m
called by procedure SETUP
6 N/ o, u- ?/ {; J# f0 `$ K called by 按钮 'setup'1 Z; d F7 \, [' C$ a2 l0 a
求大神解答啊 |