http://kor.i2p/books/The%20C%20Programming%20Language%20by%20K&R/appb.html
Pad with '\0' 's
if ct has fewer than n characters. char *strcat(s,ct) concatenate string ct to end of string s ; return s . char *strncat(s,ct,n) concatenate at most n characters of string ct to string s , terminate s with '\0' ; return s . int strcmp(cs,ct) compare string cs to string ct , return < 0 if cs < ct , 0 if...