What will happen when you attempt to compile and run the following code?

What will happen when you attempt to compile and run the following code?

#include

#include

using namespace std;

string fun(string, string);

int main()

{

string s="Hello";

cout << fun(s, " World");

return 0;

}

string fun(string s1, string s2)

{

return s1+s2;

}