Strings and what they mean

[N7pXjE8b]

I need help in understanding like these types of strings and what they do.

strlen()
gets()
fgets()
puts()
fputs()
strcpy()
strncpy()
strcat()
strncat()
strcmp()
strncmp()
Also the problem of scanf in strings and the purpose of the Null.
Some of these I know but I just wanna make sure its correct.

[jasonwynn10]

really -_- two accounts and two posts?!
http://www.cplusplus.com/forum/general/179478/