How to resolve this error in c++?

this code in c++
#include <iostream>
using namespace std;
int main()
{ return 0; }
struct X;
struct Y;
struct Y
{ X ox; };
struct X
{ Y oy; };
gives error as:"field `ox' has incomplete type"
how to resolve it without using pointer

Using a pointer member is probably the correct approach. If not, you might use a reference member.

Use code tags, first of all... Other than that, the problem can't be resolved without pointers. See, if "A" contains "B" but "B" contains "A"... That's kind of impossible unless A == B.

yes reference will definitely work ,
but I don’t understand code tag ,EVOEx,will u please elaborate this.

Originally Posted by hr1212s

yes reference will definitely work ,
but I don’t understand code tag ,EVOEx,will u please elaborate this.

Before code, add the text "[ code ]" (without spaces). After the code at "[ /code ]" (without spaces). If you do that code should be indented. See the difference:

#include <iostream>
int main()
{
for(int i = 0; i < 100; ++i)
std::cout << i << std::endl;
}

(No code tags)

Code:

#include <iostream>
int main()
{
  for(int i = 0; i < 100; ++i)
    std::cout << i << std::endl;
}

(with code tags)