c语言把结构体内容写入文件问题

Question

#include
#define m 2
main(){
int i;
FILE *fp;
typedef struct{
int year;
int month;
int day;
}date;
struct student{
int number;

char name[20];
date birth;
}student1[m];
fp=fopen("student.doc","w");
for(i=0;i<m;i++){
student1[i].number=i;
scanf("%s",student1[i].name);
scanf("%d%d%d",&(student1[i].birth.year),&(student1[i].birth.month),&(student1[i].birth.day));
fwrite(&(student1[i]),sizeof(struct student),1,fp);
}
fclose(fp);
}

Answer 1

fp = fopen("student.doc", "w");这句不对，写入doc不能用fopen
改成fp = fopen("student.txt", "w");