read a csv file and and add the data into vector in c++

I wrote a program that receives values ​​and transfers them to a column in Excel.

I wrote a while loop that would receive a line from the excel file and it would insert the value into the vector but it doesn't work. I would appreciate help

#include <iostream>
using namespace std;
#include <fstream>
#include <string>

/*
int main()
{

    ofstream exc1;
    exc1.open("e.csv");

    float x;
    cout << " enter x: \n press ctrl z to stop \n";

    while (cin >> x)
    {
        exc1 << x  << endl;
    }

    exc1.close();

}

*/

#include <vector>

int main()
{
    ifstream exc1;
    exc1.open("e.csv");
    string line;
    vector <string> x;
    
    int i = 0;
    while (getline(exc1, line, ','))
    {
        
        x.push_back(line);
        cout << x.at(i);
        i++;
    }
    
    
    cout << "vector: \n";
    cout<<x.at(1);
    cout<<x.at(2);
  cout<<x.at(3);    

    exc1.close();
}