链表结点添加的小疑问

浅唱那湛蓝

1. #include <stdio.h>
   
2. #include <malloc.h>
   
3. #include <string.h>
   
4. 
   
5. typedef struct NumInfo
   
6. {
   
7.         int                                number;
   
8.         struct NumInfo        *next;
   
9. }NumInfo, *pNumInfo;
   
10. 
    
11. void insertNum(pNumInfo *numNode, int num)
    
12. {
    
13.         pNumInfo node = (pNumInfo)malloc(sizeof(NumInfo));
    
14.         memset(node, 0, sizeof(NumInfo));
    
15.         node->number = num;
    
16.         if (*numNode==NULL)
    
17.                 *numNode = node;
    
18.         else
    
19.         {
    
20.                 node->next = *numNode;
    
21.                 *numNode = node;
    
22.         }
    
23. }
    
24. 
    
25. int main()
    
26. {
    
27.         pNumInfo node;
    
28.         insertNum(&node, 10);
    
29.         return 0;
    
30. }

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CPP里面有pNumInfo *&numNode，
然后在C中，我就习惯用**了。
这种方式写代码，有什么不好的地方呢、？

浅唱那湛蓝

回复 2# pmerofc

慧眼呵，我才难过呢。

1.         if (*numNode!=NULL)
   
2.                 node->next = *numNode;
   
3.         *numNode = node;

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确实好看多了

leopanhang

*numNode!=NULL 不用*吧，numNode 是个指针，直接numNode == NULL 去判断就可以了。
另外，for node allocation, should use safe guard, like :
pNumInfo node = (pNumInfo)malloc(sizeof(NumInfo));
Assert(node != NULL);
then,        memset(node, 0, sizeof(NumInfo));

in C++, it doesn't matter if you still use double star as reference, just like u said. **pointer.
However, *&pointer and **pointer indeed are not the same thing.

Chinese input method got something wrong, sorry.