C++ structure?

What's the correct structure for coding? Where are you supposed to put the braces "{}" at? When and where are you supposed to indent or use blank spaces?

This:

int main(){
  cout << "Hello World!";
  return 0;}


or this:
int main()
{
  cout << "Hello World!";
  return 0;
}

Is there a tutorial or book for this?

The correct way is all braces on their own line and 4 space indents. Don't let trolls tell you otherwise.