链表打印乱码，目录下未出现任何中文，各种编译器都无法通过

很简单但就是不知道哪里出了问题。
链表总是打印出来乱码。
求各位帮忙，只用看两个函数，非常感谢。

#include 
#include 
#include 
#include 
#include "lab52.h"
void welcome(){
    printf("format of statistical information：id name number");
    printf("please enter the corresponding code number\n"); 
    printf("1.insert\n");
    printf("2.delete\n");
    printf("3.search\n");
    printf("4.change\n");
    printf("5.store\n");
    printf("6.all display\n");
    printf("7.single display\n"); 
    printf("8.sort\n");
    printf("else.don't save the disk and exit the system\n"); 
}
void insert(list *f){
    printf("please enter them in order: id name number\n");
    list *newnode=(list *)malloc(sizeof(list));
    newnode->next=NULL;
    if(NULL==f)f=newnode;
    else{
    newnode->next=f;
    f=newnode;}
    scanf("%s %s %d",&newnode->data.id,&newnode->data.name,&newnode->data.num);
    printf("the entry was successful\n");
    system("pause");
    system("cls");
}

void prin(list *f){
    list *p=f;
    while(1){    
    printf("%s\t%s\t%d\n",p->data.id,p->data.name,p->data.num);
    p=p->next;
    if(p==NULL)break;
    }
    system("pause"); 
    system("cls"); 
}

int main()
{   list *first=(list *)malloc(sizeof(list));
    first=NULL;
       while(1){
    welcome();
    char a=getch();
        switch(a)
        {
            case '1':
            insert(first);
            break;
            case '2':    
            break;
            case '3':
             break;
            case '4': 
            break;
            case '5': 
            break;
            case '6': 
            prin(first);
            break;
            case '7': 
            break;
            default: 
            exit(0);
        }
    }
    return 0;
}

以下是lab52.h

#define MAX_ID_LEN 30

#define MAX_NAME_LEN 30
typedef struct {
char id[MAX_ID_LEN];
char name[MAX_NAME_LEN];
int num;
} info;


typedef struct node
{
info data;
struct node *next;
} list;

insert 函数只是插入了节点而已，scanf 接收输入的变量有问题，id 和 name 数组不需要 & 取地址。
scanf("%s %s %d", newnode->data.id, newnode->data.name, &newnode->data.num);

什么乱码，运行结果截出来看看。该不会只是编码格式的问题吧