C++ code for Finding ranks in a vector array

I just made this function, which to be honest, I have been tinkering with since 3 days, it is a part of a problem statement in a hackerRank problem. At the beginning there were a lot of grey areas in my approach for this problem but today I thought about a completely different approach, which as I had expected worked completely fine, after going through a tortous journey full of errors, I am not exaggerating but, the compiler of programiz is sometimes very grievous, in the beginning it was not accepting vector header file, but it did accept after refreshing the page. I will be using this function for solving the Climbing the leaderboard problem of HackerRank.

 #include <iostream>

#include<vector>

using namespace std;

void display(vector<int> array){

    for(int i=0;i<array.size();i++){

        cout<<array[i]<<" ";

    }

}

vector<int> rankGiver(vector<int> arr){

    int temp;

    vector<int> array(arr);

    for(int i=0;i<arr.size()-1;i++){

        for(int j=0;j<arr.size()-1-i;j++){

            if(arr[j]>arr[j+1]){

                temp=arr[j];

                arr[j]=arr[j+1];

                arr[j+1]=temp;

            }

        }

    }

    cout<<"\nThe array passed to the function rankGiver after sorting process\n";

    display(arr);

    vector<int> rank(arr.size());

    rank[arr.size()-1]=1;

    for(int i=arr.size()-2;i>=0;i--){

        if(arr[i]==arr[i+1]){

            rank[i]=rank[i+1];

        }else{

            rank[i]=rank[i+1]+1;

        }

    }

    cout<<endl;

    cout<<"The rank array inside the function rankGiver\n";

    display(rank);

        int count=0;

        for(int k=0;k<array.size();k++){

            for(int l=k+1;l<array.size();l++){

                if(array[k]==arr[l]){

                    array[k]=rank[l];

                    

                }

            }

        }

        cout<<"\nThe final returned array by the function\n";

    return array;

}

int main() {

    // Write C++ code here

    // std::cout << "Hello world!";

vector<int> arr{

    12,23,4,5,67,4

};

display(arr);

vector<int> vect;

vect=rankGiver(arr);

cout<<"\n";

display(vect);

return 0;

}