Huffman Coding Error When Passing Parameter

Question

code:

typedef struct
{
 int weight;
 char c;
 int parent, lchild, rchild;
} Node, *HTree;
void findmin(HTree ht, int len, int *p1, int *p2)
void CreateHTree(HTree ht, int n)
void print(HTree ht,int n)
{
 for(int i=1;i<=2*n-1;i++)
 {
 printf("%d %d %d\n",ht[i].parent,ht[i].lchild,ht[i].rchild);
 }
}
int main()
{
 int n;
 scanf("%d", &n);
 HTree ht;
 char **hc;
 CreateHTree(ht, n);
 print(ht,n);
 return 0;
}

Well, when I transfer parameter ht, it seems never transfer correctly. Can someone tell me how to solve it? :(

I just want to know what's wrong.

• Mark Adler: You have no semicolons after the prototypes for findmin and CreateHTree, so this can't even compile. If you're going to provide example code in a question, always provide complete code (which this isn't) that compiles. Otherwise, no one can help you. See stackoverflow.com/help/minimal-reproducible-example
• Mark Adler: ht is an uninitialized pointer, and CreateHTree() returns nothing. So there is no way to get anything back from CreateHTree(). What the heck is hc? It is not used.