Sorting for equal_range()

Hello all

I am using 3 vectors each of which is of type struct "ABC". I am trying to find duplicates in each vector using equal_range() method. In order for equal_range() to work, the vectors must be sorted. The criteria for sorting each vector is different, therefore, I can't write a single sort method inside the struct "ABC". Is there any way to write different methods for sorting, one for each vector?

Many Thanks

Code:

`// sort algorithm example`

#include <iostream>

#include <algorithm>

#include <vector>

using namespace std;

struct mystruct {

string a;

string b;

string c;

string d;

string e;

};

Sort function-1 (does it not have to have some relevance to struct mystruct?)

{

On basis of variables a, b and c

}

Sort function-2 (does it not have to have some relevance to struct mystruct?)

{

On basis of variables a, d and e

}

Sort function-3 (does it not have to have some relevance to struct mystruct?)

{

On basis of variables b, c and d

}

int main () {

vector< mystruct > myvector1;

vector< mystruct >::iterator it1;

sort (myvector1.begin(), myvector1.end(),Sort function-1);

vector< mystruct > myvector2;

vector< mystruct >::iterator it2;

sort (myvector2.begin(), myvector2.end(),Sort function-2);

vector< mystruct > myvector3;

vector< mystruct >::iterator it3;

sort (myvector3.begin(), myvector3.end(),Sort function-3);

return 0;

}