we can store set of names in string.but can only store set
of characters in array

when we declare array of character it has 2 be teminated by 
null,but termination by null in case of string is automatic.

aaray is nothing but set of data type
string is nothing but group of character

in char array space are not allowed means part after space 
not consider but in string it is allowed

In terms of C language,
string is nothing but the array of characters.
char a[10] is nothing but a string with 9 characters and a 
null..

we can stoore set of names in string,but can store only 
charcter's in array

In case of a string, we cant print each character by 
character whereas for arrays of char we can do that.

String is terminated by a NULL character by default.
in array we have to explicitly do that.

the compiler automatically puts a null character when we
insert a string...for eg "abc" for the compiler is "abc\0". 
but for a array of characters we need to assign a place for
it..for eg a[15] contains 14 characters and a null
character('\0').

String is much same as character array, it can also be
checked by each characters:
string str;for(int i=0;str[i]!='\0';i++) cout <<str[i]<<endl;

1. The NULL terminator is loaded automatically in string.('\0')
2.Both of them drop the data after space when we take input.

when we declare array of char it has to be terminated by 
null but termination by null in case of string is 
automatic.the compiler automatically puts a null char when 
we insert a string for example "kapil" for the 
string "kapil\0", but for a char array we need assign a 
place for it for example a[6] contains five char & a null 
char.& secondly
when char array is read through scanf() input function then 
spaces are not allowed if characters is read as string 
(through gets() function) spaces are allowedand are treated 
as a single char.