1. package main 
   

   ---

2. ---

3. import "fmt" 
   

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4. ---

5. //定义结构 
   

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6. type treeNode struct { 
   

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7. value int 
   

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8. left, right *treeNode 
   

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9. } 
   

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10. ---

11. //自定义的工厂函数 
    

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12. func createNode(value int) *treeNode{ 
    

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13. //返回的是局部变量的地址 
    

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14. return &treeNode{value: value} 
    

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15. } 
    

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16. ---

17. // 
    

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18. func (node treeNode) print(){ 
    

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19. fmt.Print(node.value) 
    

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20. } 
    

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21. ---

22. func main() { 
    

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23. //创建结构 
    

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24. root := treeNode{value: 3} 
    

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25. root.left = &treeNode{} 
    

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26. root.right = &treeNode{5, nil, nil} 
    

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27. root.right.left = new(treeNode) 
    

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28. root.left.right = createNode(2) 
    

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29. ---

30. root.print() 
    

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31. fmt.Println() 
    

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32. } 
    

    ---

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