SOURCE 

var tree= 
  {},
  {"value":1;"left":tree[2];"right":tree[3]},
  {"value":2;"left":tree[4];"right":tree[5]},
  {"value":3;"left":tree[6];"right":""},
  {"value":4;"left":tree[7];"right":""},
  {"value":5;"left":"";"right":tree[8]},
  {"value":6;"left":"";"right":""},
  {"value":7;"left":"";"right":""},
  {"value":8;"left":"";"right":""}
]
function bianli(node){
  if(!node["left"]){bianli(node.left)}
  console.log(node{"value"});
  if(!node.right)(bianli(node["right"]));
}
bianli(tree[1])
console 命令行工具 X clear 

                    

                        
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console