Answer to Exercise 1-1
Run the "hello, world" program on your system. Experiment with leaving out parts of
the program, to see what error messages you get.
Murphy's Law dictates that there is no single correct answer to the very first exercise
in the book. Oh well. Here's a "hello world" program:
#include <stdio.h>
int main(void)
{
printf("hello, world\n");
return 0;
}
As you can see, I've added a return statement, because main always returns int, and
it's good style to show this explicitly.
Answer to Exercise 1-2
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");
