title: printf() surprising console output
body: <p>I need to develop with C++ after a break of a few years. Anyway, I got problems following the tutorials I am currently reading. After writing the following code-snippet I expected to see 'Hello World' in my console, but I am only able to see 'Debug: StrangeChars'; What went wrong? </p>
  
  <pre><code>std::string myString("Hello World"); 
  printf("* Debug: %s \n", myString);
  </code></pre>