2013-12-16 138 views

回答

3

你可以做到这一点很容易被“算海龟,这里”

to setup 
    Clear-all 
    Create-turtles 50 [move-to patch random 30 random 30] 

    reset-ticks 
end 


to set-label 

    ask patches [ 
    ifelse count turtles-here > 0 
    [set plabel count turtles-here] 
    [set plabel ""] 
    ] 

end 

to go 
    ask turtles 
    [rt random 5 
    fd 0.3] 
    set-label 
    tick 
end 

我已经包含了一个工作的例子,但你的回答是“set plabel count turtles-here