我编的程序如下turtles-own [energy]6 N$ x) t7 Q3 |# h7 ^- s: ]- N( H2 \
to setup9 [( N+ }9 C3 B) ~
clear-all
, ~- L) W6 y8 v setup-patches, y! v: K( K- G3 D, w
create-turtles 100
4 V; x* i$ n0 }" j/ G3 a7 V do-plots
) k [8 X( V- D+ {8 X# ~ ask turtles [ setxy random-xcor random-ycor ]
' t4 n+ I0 o: q$ `. d: uend- H" W0 t# x* h3 o
to go& P0 I L* {7 R [; _8 n0 X1 C3 i
move-turtles2 n3 X# ]) M, w D3 F
eat-grass
8 D7 H3 E. [4 n reproduce
2 h) T, U' y5 z' o; ?5 g check-death
2 x! l. Y2 ?* B3 m, f regrow-grass2 s# {' y7 F$ ], k: K$ I
do-plots' m& V: M$ [; c: E3 |( r; v, L
end9 l9 Y( Q0 @, {2 o
to move-turtles3 T8 P7 j1 R; G# |( \
ask turtles [5 h/ I0 M- Z6 @
right random 3609 l9 r% j& w! |/ \) |3 n( l. d7 Z
forward 1
3 u( P; f5 u1 n* d set energy energy - 18 L) L9 k! L w+ d
]: W5 X, f/ l( q. q
end; `+ Y/ t0 A$ t/ V
to setup-patches) U2 P! j5 {4 K2 x8 p
ask patches [ set pcolor green ]& D9 {9 v) R, k0 M9 E# b
end
% h: ~) f* Z& i0 g# _2 z5 Tto setup-turtles
. I! T( ^( [( ?+ J* }) [ create-turtles 100+ v$ j% q; N5 b& U Q, D1 c6 L
ask turtles [ setxy random-xcor random-ycor ]4 o# d# B/ O- I
end, z/ z! X8 Q( A @5 a5 f
to eat-grass
) A* Y8 {9 r& A/ O, f ask turtles [7 R4 r. X& w( V7 E! R
if pcolor = green [0 R7 y o. O; g7 _; @& ?
set pcolor black' Q4 n+ `/ y$ n/ X+ L5 o
set energy (energy + 10) I- \( K/ o, B
]" x* p6 k6 l4 k2 A3 S9 {
ifelse show-energy?* X8 {, c5 q, S" Z( U' D0 P8 K
[ set label energy ]
9 U8 K5 S! K' X/ B0 J9 Y8 @/ y9 g4 I6 } [ set label "" ]: Y: R% ?' |+ `. S) a
]
. [( Z& J8 F& A7 ^ z; D8 l% Xend* |$ B9 R3 b8 }
to reproduce
* I- b- ^) ?/ t3 p ask turtles [! ?- g3 Y5 C- L$ s9 w
if energy > 50 [" k% @! v+ Z1 ]" f ?% X q/ U6 I
set energy energy - 50
6 C) K: G, `0 B1 Z% ~& N! ^/ j hatch 1 [ set energy 50 ]+ ^$ }. O. I2 H9 I
]( J0 a/ T A, h1 S: q- Q1 O
]
1 }8 E$ R% D5 ?! V, nend
6 @6 w, P, s* L. }to check-death
( I" O; ~' u) `* A9 }. K7 c ask turtles [1 v9 J+ Y( }; V5 [8 s' u
if energy <= 0 [ die ]& J/ B/ t) E/ m7 W8 G+ Q
]& r9 J& o2 J6 s$ Q. a
end& {; ]$ j; n9 B* W* a
to regrow-grass7 n3 ?/ ~$ N+ E4 B, G+ @; C: ^
ask patches [9 J- B' q) ^) B- H* E
if random 100 < 3 [ set pcolor green ]
0 W4 R' s4 _4 F8 S ]
8 P0 g: w6 s* c: r! h0 \) tend& ?# b& E0 T( C0 l$ N+ e
to do-plots
) J7 i# j. j8 T6 Z9 K' ]: e5 S0 d set-current-plot "Totals"+ l* L( X9 q0 U& K2 R
set-current-plot-pen "turtles"1 ]9 ?6 v+ G( v P5 _2 s
plot count turtles* w" Z5 |8 ]% g# T& C. `/ j. P! v
set-current-plot-pen "grass"
' y. f( N. w) b; Z* q plot count patches with [pcolor = green]- _7 | z3 y' {6 ?3 o9 r
end) x8 m% L$ ^8 F+ {- u8 U7 n
可是运行时提示no such plot: "Totals"( b6 L3 k6 s5 O: L: [! b
error while observer running SET-CURRENT-PLOT. R" ]$ U" y; S, b; E
called by procedure DO-PLOTS
9 z& o9 }, i1 s% }. ?8 Z, L called by procedure SETUP
" t- s' w8 E9 X' {7 a$ H called by 按钮 'setup'* Q% @* B. x( V
求大神解答啊 |