Name
      trim — remove leading and trailing whitespace
     
    
      Synopsis
      
        string trim(str);
        string str;
       
     
    
      
      Description
      Returns str with the leading and
      trailing whitespace removed. Whitespace is defined as those characters
      whose ASCII character codes are less than or equal to 0x20 (the space
      character).
     
    
      
      Example 54. trim
      Example
      
string trimmed = trim("    Hello!    ");    // = "Hello!"