How to print '\n' instead of a newline?

Question

I am writing a program that uses prints a hex dump of its input. However, I\'m running into problems when newlines, tabs, etc are passed in and destroying my output formatti

Answer 1

If you want to make sure that you don't print any non-printable characters, then you can use the functions in ctype.h like isprint:

if( isprint( theChar ) )
  printf( "%c", theChar )
else
  switch( theChar )
  {
  case '\n':
     printf( "\\n" );
     break;
  ... repeat for other interesting control characters ...
  default:
     printf( "\\0%hho", theChar ); // print octal representation of character.
     break;
  }