Compare strings using locale-specific information. strcoll compares the string pointed to by s1 to the string pointed to by s2, according to the current locale-specific information.
Return value:
Returns a value indicating the relationship of string1 to string2, as follows.
Return value Relationship of string1 to string2
< 0 string1 less than string2
0 string1 identical to string2
> 0 string1 greater than string2