eclipse: Error - The selection cannot be launched, and there are no recent launches

Question

The selection cannot be launched, and there are no recent launches.

At the end of this windows there is an error message about PATH. Please take a look: MAKE PATH The Program what I tried to run:

#include <iostream>
int main ()
 cout<<"Hello World!";

 return 0;
}

When I click on the 'Play' button/ Run command, it keeps showing this disgusting-annoying error message.

What could be the solution?

I check another articles where they stated that it has a problem with 'main ()' but it is not missing from my code.

Now the full code looks like this:

#include <iostream>
using namespace std;

int main ()
 cout << "Hello World!";

 return 0;
}