这是书上的例子，代码如下

输入时要加,

建议日期全部用整型.加个日期判断函数.如果真的需要把月份改成英文就定义一个数组保存月份名称.

下面这个应该可以了吧:

#define MAX 30
#include<stdio.h>
#include<stdlib.h>
typedef struct datatype{
int year;
int month;
int date;
}DATE;
typedef struct personnel{
char name[20];
char sex[8];
DATE birthday;
char speciality[20];
char class1[10];
}PERSONNEL; /*typedef struct personnel PERSONNEL;错误的例子*/
PERSONNEL student[MAX];

int main(void)
{
int i,total;
printf("input the total number of students:");
scanf("%d",&total);
for(i=0;i<total;i++)
{
printf("input the %d student's name,sex:",i);
scanf("%s%s",student[i].name,student[i].sex);
printf("input the year month,date of %d student's birthday:",i);
scanf("%d%d%d",&student[i].birthday.year,&student[i].birthday.month,&student[i].birthday.date);
printf("input the speciality,class of %d student:",i);
scanf("%s%s",student[i].speciality,student[i].class1);
}
for(i=0;i<total;i++)
{
printf("|%2d|%-6s",i,student[i].name);
printf("|%2s",i,student[i].sex);
printf("|%4d",i,student[i].birthday.year);
printf("|%2s",i,student[i].birthday.month);
printf("|%2d",i,student[i].birthday.date);
printf("|%12s",i,student[i].speciality);
printf("|%8s|\n",i,student[i].class1);
}
return 0;
}

好了，没有问题了，多谢。我之前的代码在最后的printf那里也有问题，我重修改一下再发上来。