cpp/C5/P9/c9-11.c

#include <stdio.h>
struct
{
  int num;
  char name[10];
  char sex;
  char job;
  union
  {int clas;
   char position[10];
  }category;
}person[2];

int main()
{
  int i;
  for(i=0;i<2;i++)
  {printf("please enter the data of person:\n");
   scanf("%d %s %c %c", &person[i].num, &person[i].name,
           &person[i].sex, &person[i].job);
   if(person[i].job == 's')
      scanf("%d", &person[i].category.clas);
   else if(person[i].job == 't')
      scanf("%s", person[i].category.position);
   else
       printf("Input error!");
  }
  printf("\n");
  printf("No.  name      sex job class/position\n");
  for(i=0;i<2;i++)
  {
   if (person[i].job == 's')
     printf("%-6d%-10s%-4c%-4c%-10d\n",person[i].num, person[i].name,
          person[i].sex, person[i].job, person[i].category.clas);
   else
     printf("%-6d%-10s%-4c%-4c%-10s\n",person[i].num, person[i].name,
        person[i].sex, person[i].job, person[i].category.position);

  }
  return 0;
}