C语言编电话薄，只开了个头。为什么运行不了

Question

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
typedef struct Node
{
char pname[20];
char pnum[12];
char pindex[30];
struct Node* next;
} Phone;

// 初始化
void Initialize(Phone* list)
{
list = (Phone*)malloc(sizeof(Phone));
list->next=NULL;
}

// 添加记录
void Add(Phone* list, char* name, char* num, char* index)//const限制一个变量不允许改变，起到静态变量的作用
{
Phone* p,p1;
for (p = list; p->next != NULL; p = p->next);
p1 = (Phone)calloc(sizeof(Phone),1);
strcpy(p1->pname, name);
strcpy(p1->pnum, num);
strcpy(p1->pindex, index);
p1->next=p->next;
p->next=p1;
printf("%s,%s,%s\n", p1->pname, p1->pnum, p1->pindex);
}

int main()
{
Phone* list;
Initialize(&list);
int i;
Phone *p;
int n;
printf("输入联系人个数：");
scanf("%d",&n);
for(i=0;i<n;i++)
{

    scanf("%s,%s,%s\n", &p->pname,&p->pnum,&p->pindex);
    Add(list,p->pname,p->pnum,p->pindex);
    printf("%s,%s,%s\n", p->pname, p->pnum, p->pindex);
    p=p->next;
}
return 0;

}

Answer 1

好像是因为给结构分配内存出现了错误，修改了一下，如下：

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
typedef struct Node
{
    char pname[20];
    char pnum[12];
    char pindex[30];
    struct Node* next;
} Phone;

// 初始化
void Initialize(Phone** list)
{
    *list = (Phone*)malloc(sizeof(Phone));
    (*list)->next=NULL;
}

// 添加记录
void Add(Phone* list, char* name, char* num, char* index)//const限制一个变量不允许改变，起到静态变量的作用
{
    Phone* p,*p1;
    for (p = list; p->next != NULL; p = p->next);
//    printf("0\n");
    p1 = (Phone *)malloc(sizeof(Phone));
//    printf("1\n");
    strcpy(p1->pname, name);
    strcpy(p1->pnum, num);
    strcpy(p1->pindex, index);
//    printf("2\n");
    p1->next=p->next;
    p->next=p1;
//    printf("3\n");
//    printf("%s,%s,%s\n", p1->pname, p1->pnum, p1->pindex);
}

int main()
{
    Phone* list;
    char pname[20];
    char pnum[12];
    char pindex[30];
    
    printf("list=%p\n",list); 
    Initialize(&list);
    printf("list=%p\n",list); 
    int i;
    Phone *p;
    int n;
    printf("输入联系人个数：");
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
    
        scanf("%s %s %s", pname,pnum,pindex);
        Add(list,pname,pnum,pindex);
       // printf("%s,%s,%s\n", pname, pnum, pindex);
       // p=p->next;
    }
    
    //打印结果
    p = list->next;
    for(i=0;i<n;i++){
        if(p!=NULL){
            printf("%s %s %s\n",p->pname,p->pnum,p->pindex);
            p=p->next;
        }
    } 
    
    return 0;
}