#include<stdio.h>
#include<stdlib.h>

typedef struct HT
{
    char ch;
    unsigned weight;
    struct HT *lchild,*rchild;
    int parent;
    int flage;
} HuffmanTree,*HuffmanTiTree;

void print(HuffmanTiTree *Ht,int num)
{
    int i;
    HuffmanTree *T;
    for(i = 1; i <= num; i ++)
    {
        T = *(Ht + i);
        printf(" %d  ",T->weight);  
    }
    free(Ht);
}

int INinit(HuffmanTiTree *Ht,void print(HuffmanTiTree *,int ))
{
    HuffmanTree *T;
    int N;                //预估最大权值个数
    int n;                //可能的权值个数
    int M;                  //真实权值个数
    unsigned weight;
    char Ch;
    int i=1;
    printf("请输入权值个数或者可能的最大值：\n");
    scanf("%d",&n);
    N = 3 * n;
    if(!(Ht = (HuffmanTiTree*)malloc(N * sizeof(HuffmanTiTree))))
        exit(0);
    printf("请输入权值与其字符(如：2，a   当输入权值-1表示结束)：\n");
    while(1)
    {
        if(!(T = (HuffmanTree*)malloc(sizeof(HuffmanTree))))
            exit(0);
        scanf("%d，%c",&weight,&Ch);
        if(weight == -1)       //输入建数组
        {
            free(T);
            Ht[i] = NULL;
            break;   
        }
        T->weight = weight;
        T->ch = Ch;
        T->lchild = NULL;
        T->rchild = NULL;
        T->flage = 1;
        T->parent = -1;
        Ht[i] =  T;
        i ++;
    }
    M = i;
      print(Ht,M);
    return M;
}

int main()
{
    int N;
    HuffmanTiTree *HT;
    N =INinit(HT,print);
    printf("%d",N);
}
 

scanf中不要用逗号和空格

scanf如果用上逗号或空格，输入数据是也要加上，否则会错

这里你用了个中文逗号

 printf("请输入权值与其字符(如：2，a   当输入权值-1表示结束)：\n");
    while(1)
    {
        if(!(T = (HuffmanTree*)malloc(sizeof(HuffmanTree))))
            exit(0);
        scanf("%d，%c",&weight,&Ch);

你用print函数当实参了，这样会出错的。

int main(void)
{
    int N;
    HuffmanTiTree *HT;
    N =INinit(HT,print);