> 我用二叉树做的
> 下面这个函数头似乎有问题，但不知道问题在哪里
> 编译错误是这样的：
> C:
> Main.c(58) : error C2143: syntax error : missing ')' before '&'
> Main.c(58) : error C2143: syntax error : missing '{' before '&'
> Main.c(58) : error C2059: syntax error : '&'
> Main.c(58) : error C2059: syntax error : ')'
> 
> GCC:
> Main.c: At top level:
> Main.c:58: error: syntax error before '&' token
> Main.c: In function `insert':
> Main.c:60: error: `root' undeclared (first use in this function)
> Main.c:60: error: (Each undeclared identifier is reported only once
> Main.c:60: error: for each function it appears in.)
> Main.c:64: error: `rec' undeclared (first use in this function)
> 
> int insert(Tree &root,char *rec)
> {
> 	if(!root)
> 	{
> 		root=(Node *)malloc(LEN);
> 		root->count=1;
> 		strcpy(root->item,rec);
> 		root->left=root->right= NULL;
> 		return 0;
> 	}
> 	Node *f=NULL,*p=root;
> 	while(p)
> 	{
> 		if(strcmp(p->item,rec)<0)
> 		{
> 			f=p;
> 			p=p->right;
> 		}else if(strcmp(p->item,rec)==0)
> 		{
> 			p->count++;
> 			return 1;
> 		}else
> 		{
> 			f=p;
> 			p=p->left;
> 		}
> 	}
> 	p=(Node *)malloc(LEN);
> 	strcpy(p->item,rec);
> 	p->count=1;
> 	p->left=p->right=NULL;
> 	if(strcmp(f->item,rec)<0)
> 		f->right=p;
> 	else
> 		f->left=p;
> 	return 0;
> }