title: Change variable value(C program)
body: <pre><code>int main(void)
  {
    int a=5;
    fun();
    printf("%d",a);
    return 0;
  }
  </code></pre>
  
  <p>I need to write body of function <em>fun()</em> such that printf will print <strong>15</strong>.  I cant change the prototype of <em>fun()</em> i.e. it cant be <strong>passed</strong> anything and I can not modify any thing in the <code>main()</code> function</p>