c语言结构体指针如何定义和使用 C语言 结构体的定义及使用
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char*\u53ef\u4ee5\u7406\u89e3\u4e3a\u6307\u5411\u4e00\u4e2a\u5b57\u7b26\u4e32\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u6307\u9488\u3002
char**\u53ef\u4ee5\u7406\u89e3\u4e3a\u5b57\u7b26\u4e32\u6570\u7ec4\uff0c
char **a = new char* [10];
for (int i = 0; i < 10; i++) a[i] = new char [30];
\u8fd9\u5c31\u521b\u5efa\u4e86\u4e00\u4e2aa\uff0ca[n]\u4ee3\u8868\u7b2cn+1\u4e2a\u5b57\u7b26\u4e32\uff0ca[n][m]\u8868\u793a\u7b2cn+1\u4e2a\u5b57\u7b26\u4e32\u7684\u7b2cm+1\u4e2a\u5b57\u7b26\u3002
typedef struct
{
unsigned int weight;
unsigned int parent,lchild,rchild;
} HTNode,*HuffmanTree;
\u662f\u7528HTNode\u8868\u793a\u8fd9\u4e2a\u7ed3\u6784\u4f53,HuffmanTree\u8868\u793a\u8fd9\u4e2a\u7ed3\u6784\u4f53\u7684\u6307\u9488\u7c7b\u578b\u3002\u8fd9\u6837\u4f7f\u7528HTNode \u5b9a\u4e49\u7684\u53d8\u91cf\u662f\u7ed3\u6784\u4f53\u7c7b\u578b\uff08\u7a7a\u95f4\u4e3a4*int=16\uff09\uff0c\u800c\u7528HuffmanTree\u5b9a\u4e49\u7684\u662f\u53ef\u4ee5\u6307\u5411\u8fd9\u79cd\u7ed3\u6784\u4f53\u7684\u6307\u9488\uff08\u7a7a\u95f4\u4e3along=4\uff09\uff0cHuffmanTree\u4e0eHTNode*\u7b49\u4ef7\u3002
HT=(HuffmanTree)malloc((m+1)*sizeof(HTNode))
HT=(HTNode*)malloc((m+1)*sizeof(HTNode))
\u4e0b\u9762\u662f\u8c03\u7528\u7684\u4f8b\u5b50\uff1a
HTNode a;
HuffmanTree b;
a.lchild=0;
b=&a;
b->lchild=0;
calloc\u4e5f\u7528\u4e8e\u52a8\u6001\u5206\u914d\u5185\u5b58\uff0c\u548cmalloc\u7a0d\u6709\u533a\u522b\uff0c\u767e\u5ea6\u4f60\u5c31\u77e5\u9053\u3002
C\u8bed\u8a00_071_\u6307\u9488\u7684\u5b9a\u4e49\u548c\u4f7f\u7528_\u4e0a
{
char name[20];
long number;
float score[4];
} ;
再定义指向结构体类型变量的指针变量：
struct stu *p1, *p2 ;
定义指针变量p 1、p 2，分别指向结构体类型变量。引用形式为：指针变量→成员；
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