Welcome to G4EF
Change your code to something like :
using namespace std;
cout << "Hello World!";
BTW, any C++ compiler would behave the same way as yours, it's not about a fast
Your code basically prints "Hello World!" and then exits, so you fail to see the output.
If you instruct it to wait for a key-stroke before exiting (getchar ()), you can have your output on screen, till you press a key.