///////    union    ///////
#include <iostream.h>

union IntDouble 
{   int ival;
   double dval;
};

IntDouble divide(int a, int b, int& evenflag)
{ IntDouble ans;                     // union object
     if ( (evenflag = !(a % b)) )    // even division
         ans.ival = a/b;             // ans is int 
     else                            // otherwise   
         ans.dval = a /double(b);    // ans is double
     return(ans);
}

int main()
{ int flag, a=16, b=4, c=3;
  IntDouble x = divide(a,b,flag);
      if ( flag )
         cout << a << '/' << b << " = " << x.ival << "\n";
      else
         cout << a << '/' << b << " = " << x.dval << "\n";
  x = divide(a,c,flag);
      if ( flag )
         cout << a << '/' << c << " = " << x.ival << "\n";
      else
         cout << a << '/' << c << " = " << x.dval << "\n";
}