戏曲张元干送别词mp3:一个C语言问题！

#include<stdio.h>
#include<stdlib.h>
#define N 2
struct info
{
char name[20];
int age;
char job;
union
{
int class1;
char position[20];
}dept;
};
main()
{
struct info person[N];
int i;
char numstr[20];

for(i=0;i<N;i++)
{
printf("please enter data of person[%d]:\n",i);
gets(person[i].name);
gets(numstr);
person[i].age=atoi(numstr);
person[i].job=getchar();
getchar();
if(person[i].job=='s')
{
printf("input number of class1:\n");
gets(numstr);
person[i].dept.class1=atoi(numstr);
}
else if(person[i].job=='t')
{
printf("input position:\n");
gets(person[i].dept.position);
}
else printf("input error!");
}
printf("\n");
printf("name age job class/position \n");
for(i=0;i<N;i++)
if(person[i].job=='s')
printf("%-10s%d%6c%10d\n",person[i].name,person[i].age,person[i].job,
person[i].dept.class1);
else
printf("%-10s%d%6c%10s\n",person[i].name,person[i].age,person[i].job,
person[i].dept.position);
getch();
}
第27行为什么要加getchar();而不加就不能输出 person[i].dept.class1和person[i].dept.position。请帮帮忙！谢谢了！