title: how to add char type integer in c
body: <p>This is the sample code of my program, in which i've to add two string type integer <code>(ex: "23568" and "23674")</code>. So, i was trying with single <code>char</code> addition.</p>
  
  <pre><code>char first ='2';
  char second ='1';
  </code></pre>
  
  <p>i was trying like this..</p>
  
  <pre><code>i=((int)first)+((int)second);
  printf("%d",i);
  </code></pre>
  
  <p>and i'm getting output <strong>99</strong>, because, it's adding the <strong>ASCII</strong> value of both. Anyone please suggest me, what should be the approach to add the char type number in <strong>C</strong>.</p>