title: What does this code mean "ofstream fout(getenv("OUTPUT_PATH"));"
body: <p>I'm still new to cpp, and I will appericate if someone can help me to understand this line of code:</p>
  
  <pre><code>ofstream fout(getenv("OUTPUT_PATH"));
  </code></pre>
  
  <p>This code I saw almost every single Hacker Rank challange. What is the purpose of this code?</p>