I saw <?= and >?= used in a code:
<http://community.topcoder.com/stat?c=problem_solution&rm=151152&rd=5854&pm=2923&cr=310333>

I tried to compile without the includes to test if it's standard, but it didn't work. I then added the includes, but it still gives the same error:

> 
> question-mark.cpp:15:5: error: expected primary-expression before ‘?’
>  token question-mark.cpp:15:6: error: expected primary-expression
>  before ‘=’ token question-mark.cpp:15:9: error: expected ‘:’ before
>  ‘;’ token question-mark.cpp:15:9: error: expected primary-expression
>  before ‘;’ token
> 
> 
> 

```
#include <stdio.h>
#include <algorithm> 
#include <iostream> 
#include <sstream> 
#include <string> 
#include <vector> 

using namespace std;

int main()
{

    int x = 3;
    int y = 2;
    x >?= y;
    printf("x = %d\n", x);

    return 0;
}

```

Here's how it is used in the code from the link:

```
x <?= h[i][j];  // x = (h[i][j] < x) ? h[i][j] : x;

```

How can I make this work?