title: C Function Prototype With Struct Argument
body: <p>I want to write a function prototype for a function, whose argument is a pointer to a struct. </p>
  
  <pre><code>int mult(struct Numbers *n)
  </code></pre>
  
  <p>However, the struct Numbers, which is defined as</p>
  
  <pre><code>struct Numbers {
      int a;
      int b;
      int c;
  };
  </code></pre>
  
  <p>is not defined yet. How should I write a suitable prototype for mult?</p>