16.
Determine Output:
#define clrscr() 100
void main()
{
      clrscr();
      printf("%d", clrscr());
}

17.
Determine Output:
void main()
{
      printf("%p", main);
}

18.
Determine Output:
void main()
{
      char far *farther, *farthest;
      printf("%d..%d", sizeof(farther), sizeof(farthest));
}

19.
Determine Output:
void main()
{
      char *p;
      p="Hello";
      printf("%c", *&*p);
}

20.
Determine Output:
void main()
{
      int i=1;
      while(i<=5)
      {
            printf("%d", i);
            if(i>2)
                  goto here;
            i++;
      }
}
fun()
{
      here:  printf("PP");
}