using sort() in STL to sort an array

Question

I am writing code for a question which is: Write a method to sort an array of strings so that all the anagrams are next to each other. If my container is vector, it will be

Answer 1

int sortStrarr(string strarr[], int len){
     sort(&strarr[0],&strarr[len],compare) ;
    //sort(strarr's iterator.begin, strarr's iterator.end, compare); ???
}