c++ custom sort compare function

customCompare.cpp

#include <algorithm>

using namespace std;

struct people {
    int s;
    int b;
    int i;
    
    bool operator<(const people &o) const {
        if (s == o.s) return b > o.b;
        else return s < o.s;
    }
};

struct customLess {
    bool operator()(const people &a, const people &b) {
        if (a.s == b.s) return a.b > b.b;
        else return a.s < b.s;
    }
};

int main () {
    return 0;
    vector<people> ps;
    
    sort(ps.begin(), ps.end());
    sort(ps.begin(), ps.end(), customLess());
}