Hi!

I'm a C++ beginner and any help would be very much appreciated.
I would like to convert this "std::sort" into "boost::sort::spreadsort::integer_sort".

I know that I have to write "#include <boost/sort/spreadsort/integer_sort.hpp>" in
my header instead of "#include <algorithm>" but after that, this is too difficult...

Thanks!

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#include <iostream>
#include <algorithm>
using namespace std;

int main() {

    int nb1[4] = {15,  5, 0, 20};
    int nb2[4] = {99,102, 8, 2};
    int indices[4];

    for (short i=0; i<4; i++) indices[i]=i;

    sort(begin(indices), end(indices), [&](int i1, int i2) { return nb1[i1] < nb1[i2]; } );

    for (short i=0; i<4; i++) cout << nb1[indices[i]] << ' '; cout <<endl;  //  0  5  15 20
    for (short i=0; i<4; i++) cout << nb2[indices[i]] << ' '; cout <<endl;  //  8 102 99  2

    return 0;
}
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