AT>> char s[40];
 AT>> fgets (s, 40, stdin);
 NH> That will STILL give a case of the nasties if the user enters 40
 NH> characters.  You must make room for the terminating null.
 NH> char s[41];
 NH> fgets(s,40,stdin);
fgets() already makes room for the terminating NUL.  It reads at most *one 
less than* the number of characters specified in its second argument from the 
input stream given in its third, thus leaving room for a NUL to be appended 
without overflowing the buffer.
 ¯ JdeBP ®
--- FleetStreet 1.19 NR
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