/* a few library functions needed to compile flow.c with C/80 -
**   if you use BDS these are probably in your standard library
**   so do not include these in your compilation -
**					        	M.S.E.	
*/




isdigit(c)
char c;
{
	if (c >= '0' && c <= '9') return(1);
	else return(0);
}



/* test for alphabetic */

isalpha(c)
char c;
{
	if (c >= 'a' && c <= 'z') return(1);
	else if (c >= 'A' && c <= 'Z') return(1);
	else return(0);
}  


/* simple string compare */

strcmp(s,t)
char *s, *t;
{

	while(*s) if (*s++ != *t++) return(1);
	return(0);
}