title: alphabet increment in c programming
body: <p>I'm trying to make a program that can get a char from the user and display the next letter in the alphabet. So if you entered 'a' it would print 'b' I'm new to C and I'm not quite sure how to do it. 
  This is what I have so far:</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  
  int main (){
      char firstLetter [2],  secondLetter [2];
      printf ("Type in a single letter:");
      scanf ("%s", &amp;firstLetter);
      secondLetter = (int)firstLetter++
      printf ("The letter after %s is %s",firstLetter, secondLetter );
      return 0;
  }
  </code></pre>
  
  <p>I tried to have letter temporarily be an integer so that I could increase it by one but it didn't work. Any ideas?</p>