title: why it cannot convert char* to char
body: <p>In c++ we can write<br>
  1 <code>char *s="hello"</code></p>
  
  <p>but the below lines of program produces an error ( cannot convert char* to char)<br>
  2    <code>char *s; 
    *s="hello";</code></p>
  
  <p>I am confused here, what is difference between 1 and 2
  why this error is coming?</p>