我想把结构体的内容写入一个文件，为什么不成功，怎么才行

#include"stdio.h"
struct student
{char rcord[10];
char name[10];
char phone[12];
char qq[20];
}stu={11,22,33,44},stu1;
void main()
{
FILE *fp;
fp=fopen("c://p.txt","wb+");
rewind(fp);
fwrite(&stu,sizeof(stu),1,fp);
rewind(fp);
fread(&stu1,sizeof(stu1),1,fp);
printf( "%c%c%c%c",stu1.rcord,stu1.name,stu1.phone,stu1.qq);
fclose(fp);
}

写字符串需要加双引号的 像stu={"11","22","33","44"}