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[QUOTE="Frank Silvermann, post: 2466941"]
I have taken an extraordinary leap into the modern world by purchasing 
webspace.  In addition to my private concerns, I would like to make a 
part to which others, e.g. my nieces and ex-wife, can ftp.  To keep a 
hold of the reigns, I shall write a program that changes the password, 
and the brains of this prog will be in C:
#def MIN_WORD_LENGTH 9
#def MAX_WORD_LENGTH 15

/* subroutine for random permutation */
void permute(char *, int)

/* main

char p[] = "abcdefghijklmnopqrstuvwxyz";
char q[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
char r[] = "0123456789";
void swap(char *, char *);

end main */

void permute(char *m , int n)
{   ;    }

void swap(char *a, char *b)
{
char c;
c = *a;
*a = *b;
*b = c;
}
/* end pseudosource */
I'm going to build a word from p, q and r.  At this point, I have 2 
questions:
1) Does the scope look right?  I've got the subroutine at file scope and 
the swap at block scope. If I make a call to swap from within permute(), 
is every ISO compiler going to know what I'm talking about?
2)  Is it foolhardy of me to think that I can permute a string given its 
pointer and length, without needing any information back, hence the void 
declaration?  frank
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