How to sort several concatenated vectors in c++?

Question

Hello world! ✌🏻 I have several vectors that contains different data type( eg country names, populatio etc) and I want to sort those vectors ( eg, sort countries by their population in decreasing order, I know how to sort population vectors, but I can figure out how can I connect population vector with country name vector, so they match each other)
Thank you 🙏

Answer 1

You can use algorithms from <algorithm> library , I'll post code , look how works it in decreasing order , how you wanted
And how to match , you can use input or with cycles to match together)

Answer 2

https://code.sololearn.com/cIqDnmMoX4SL/?ref=app

Answer 3

I would use a map if you only have country and population.

Answer 4

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

bool cmp(pair<string, int> p1, pair<string, int> p2){
return p1.second > p2.second;
}

int main(){
vector<pair<string, int>> countries = {{"Russia", 145},{"USA", 360}};
sort(countries.begin(), countries.end(), cmp);
for(int i=0; i<countries.size(); ++i){
cout << countries[i].first << " " << countries[i].second << endl;
}
return 0;
}

You can use pairs and sort it by your own comparator function. That is easier than using two vectors

Answer 5

Input data manually