How do I run a C++ program in Xcode 4?

Question

I want to write a C++ program in Xcode on my Mac. I wrote this basic one to test it. When I build, I get a "Build Successful" message.

However, I cannot run it! If I hit Command+R nothing happens. When I go to Project->Run the Run option is disabled.

#include <iostream>

using namespace std;

int main()
{

    cout << "helo" << endl;

}

Solution

1. Launch XCode
   
2. In the "Choose template" box, pick Mac OS X, then Command Line Tool. Press Next
   
3. Give your project a name, select C++ as the type
   
4. You should see a new project with main.cpp
   
5. press the Run button

6. At the bottom of the screen, under All Output you should see:

   Hello, World!
   Program ended with exit code: 0