title: Reading a number using INT 21h (DOS) & 8086 assmebly
body: <p>I need to prompt to user a msg that tells him to write a number , then I store this number and do some operation on it 
  After searching in INT 21h I found this : </p>
  
  <pre><code>INT 21h / AH=1 - read character from standard input, with echo, result is stored in AL.
  if there is no character in the keyboard buffer, the function waits until any key is pressed. 
  
  example:
  
      mov ah, 1
      int 21h
  </code></pre>
  
  <p>The main problem that this only reads one character and represent it as ASCII 
  so If I need to write the number "357" 
  I will read it as 3 , 5 , 7 </p>
  
  <p>and this is not my goal . 
  any ideas ?</p>