typedef struct two_ch_struct
{ char ch1;
  char ch2;
} two_ch;
 
two_ch max( two_ch a, two_ch b )
{
  return (a.ch1>b.ch1) ? a : b;
}

int main()
{
   two_ch x,y,z;
   x.ch1 = 1;
   x.ch2 = 2;
   y.ch1 = 3;
   y.ch2 = 4;
   z = max(x,y);
}