#include<stdio.h>
#include<malloc.h>
struct student
{
    int num;
    char name;
    int age;
    int sex;
    struct student *link;
}stud;
  
 creat(int n)
{
    struct student *h,*p;
    int i;
    h=(struct student *)malloc(sizeof(stud));
    if(h==NULL)
    {
        printf("not enough memory!");
        return(0);
    }
    h=NULL;
    for(i=0;i<=n;i++)
    {
         
         
        if((p=(struct student *)malloc(sizeof(stud)))==NULL)

            
            
        {
            printf("内存不足！");
            return(0);
        }
        scanf("%d",&p->num);
        scanf("%s",&p->name);
        scanf("%d",&p->age);
        scanf("%s",&p->sex);
        p->link=h;
        h=p;
    }
    }
     void save(struct student *h)
     {
        FILE *fp;
              struct student *p;
        if((fp=fopen("d:\\123","w"))==NULL)
        {
            printf("can now open file!");
            
        }
        printf("\n saving file...\n");
        p=h;
        while(p!=NULL)
        {
            fwrite(&p,sizeof(stud),1,fp);
            p=p->link;
        }
        fclose(fp);
        printf("*******save successful!********\n");
   
     
   
    }
 
    void main()
    {
        struct student *h;
   
        h=(struct student *)creat(4);
        save(h);
    }
    编译通过了，为什么存储时会出现。。不能为read呢？

creat(int n)
{   少了一个右括号}

#include
#include
struct student
{
    int num;
    char name;
    int age;
    int sex;
    struct student *link;
}stud;
  
 creat(int n)
{
    struct student *h,*p;
    int i;
    h=(struct student *)malloc(sizeof(stud));
    if(h==NULL)
    {
        printf("not enough memory!");
        return(0);
    }
    h=NULL;
    for(i=0;i<=n;i++)
    {
         
         
        if((p=(struct student *)malloc(sizeof(stud)))==NULL)

            
            
        {
            printf("内存不足！");
            return(0);
        }
        scanf("%d",&p->num);
        scanf("%s",&p->name);
        scanf("%d",&p->age);
        scanf("%s",&p->sex);
        p->link=h;
        h=p;
    }
    }
     void save(struct student *h)
     {
        FILE *fp;
              struct student *p;
        if((fp=fopen("d:\\123","w"))==NULL)
        {
            printf("can now open file!");
            
        }
        printf("\n saving file...\n");
        p=h;
        while(p!=NULL)
        {
            fwrite(&p,sizeof(stud),1,fp);
            p=p->link;
        }
        fclose(fp);
        printf("*******save successful!********\n");
   
     
   
    }
 
    void main()
    {
        struct student *h;
   
        h=(struct student *)creat(4);
        save(h);
    }
    编译通过了，为什么存储时会出现。。不能为read呢？

运行通过的代码如下：哥们以后注意细节啊，浪费个那么多时间
#include<stdio.h>
#include<malloc.h>
#include<stdlib.h>
typedef struct student
{
    int num;
    char name;
    int age;
    int sex;
    struct student *link;
}stud;

stud*creat(int n)
{
    stud *h,*p;
    int i;
    h=(struct student *)malloc(sizeof(stud));
    if(h==NULL)
    {
        printf("not enough memory!");
        return(0);
    }
    h=NULL;
    for(i=0;i<=n;i++)
    {
        
        
        if((p=(struct student *)malloc(sizeof(stud)))==NULL)
            
            
            
        {
            printf("内存不足！");
            return(0);
        }
        scanf("%d",&p->num);
        scanf("%s",&p->name);
        scanf("%d",&p->age);
        scanf("%s",&p->sex);
        p->link=h;
        h=p;
        
    }
    return h;
}
    void save(struct student *h)
    {
        FILE *fp;
        stud *p;
        if((fp=fopen("d:\\123","w"))==NULL)
        {
            printf("can now open file!");
            exit(1);
        }
        printf("\n saving file...\n");
        p=h;
        while(p!=NULL)
        {
            fwrite(p,sizeof(stud),1,fp);
            p=p->link;
        }
        fclose(fp);
        printf("*******save successful!********\n");
        
        
        
    }

void main()
{
    struct student *h;
   
    h=(struct student *)creat(2);
    save(h);
}

打开是乱码，能进一步指教么

就该是乱码啊，你用专门的编辑器才可以看到具体的字符

倒数第三局需要强制类型转换吗！？

我是在他原来函数的基础上更改的，他原来函数返回值不是指针，现在就不用强制类型转换了

frite()是以二进制格式写入的，肯定是乱码啊，这不是错误，你若看看写入的数据，那就用fread读出来在屏幕上显示