Editing Pretty-printing (section)

===Example of formatting and beautifying code===
The following example shows some typical C structures and how various [[indentation style]] rules format them. Without any formatting at all, it looks like this:
<syntaxhighlight lang="c">
int foo(int k){if(k<1||k>2){printf("out of range\n");
printf("this function requires a value of 1 or 2\n");}else{
printf("Switching\n");switch(k){case 1:printf("1\n");break;case
2:printf("2\n");break;}}}
</syntaxhighlight>
The [[indent (Unix)|GNU indent program]] produces the following output when asked to indent according to the [[indent style#GNU style|GNU rules]]:
<syntaxhighlight lang="c">
int
foo (int k)
{
  if (k < 1 || k > 2)
    {
      printf ("out of range\n");
      printf ("this function requires a value of 1 or 2\n");
    }
  else
    {
      printf ("Switching\n");
      switch (k)
        {
        case 1:
          printf ("1\n");
          break;
        case 2:
          printf ("2\n");
          break;
        }
    }
}
</syntaxhighlight>
It produces this output when formatting according to BSD rules:
<syntaxhighlight lang="c">
int
foo(int k) {
	if (k < 1 || k > 2) {
		printf("out of range\n");
		printf("this function requires a value of 1 or 2\n");
	} else {
		printf("Switching\n");
		switch (k) {
		case 1:
			printf("1\n");
			break;
		case 2:
			printf("2\n");
			break;
		}
	}
}
</syntaxhighlight>