#include	"calld.h"/* * Make a printable string of the character "c", which may be a * control character.  Works only with ASCII. */char *ctl_str(unsigned char c){	static char	tempstr[6];		/* biggest is "\177" + null */	c &= 255;	if (c == 0)		return("\\0");			/* really shouldn't see a null */	else if (c < 040)		sprintf(tempstr, "^%c", c + 'A' - 1);	else if (c == 0177)		return("DEL");	else if (c > 0177)		sprintf(tempstr, "\\%03o", c);	else		sprintf(tempstr, "%c", c);	return(tempstr);}