Chapter 1 - A Tutorial Introduction 2

Answer to Exercise 1-2, page 8
Solution by Richard Heathfield
Experiment to find out what happens when printf 's argument string contains \c, where c is some character not listed above.

By 'above', the question is referring to:
\n (newline)
\t (tab)
\b (backspace)
\" (double quote)
\\ (backslash) We have to tread carefully here, because using a non-specified escape sequence invokes undefined behaviour. The following program attempts to demonstrate all the legal escape sequences, not including the ones already shown (except \n , which I actually need in the program), and not including hexadecimal and octal escape sequences.
#include <stdio.h>

int main(void)
{
  printf("Audible or visual alert. \a\n"); 
  printf("Form feed. \f\n");
  printf("This escape, \r, moves the active position to the initial position of the current line.\n");
  printf("Vertical tab \v is tricky, as its behaviour is unspecified under certain conditions.\n");

  return 0;
}