编辑代码

var myString = "Hello world!     -  swift.jsrun.net"
print(myString)
initGame()
setObject(row: 1, col：3, objectID："<")
setObject(row:3, col:1, objectID:"B")
setobject(row: 6, col: 2, objectID: "B") 
display()
step ()
step()
turn(direction:"left")
step()
step()
display()