How to sort one array and get corresponding second array in C++? [duplicate]

Question

I have two arrays in same size. And want to sort one of the array normally and then sort the next array elements accordingly. Let's say we have two arrays

e[] = {4,2,3,7,6,8}
s[] = {2,0,4,3,7,9}

First I want to sort array e normally, Then change the element positions of s array according to the changed element positions of e.

This should be the final result

e[] = {2,3,4,6,7,8}
s[] = {0,4,2,7,3,9}

How should I do this? Should I use a class object with these two as private members and then proceed? If so, how to do that?

Answer 1

Create a single array (or vector) of std::pair objects, where first is from the first array and second from the second. Then just use std::sort with a custom comparator function that uses only second from the pair for comparison. Iterate over the sorted array (or vector) and split up into the original arrays.

Note: If the values in each array are tightly coupled then consider putting them in a structure or class instead of using two (or more) distinct arrays.