int main()
{
vector<double> list;
bool more = true;
while (more)
{
  double x;
  int yes;
  cout << "Do you have numbers? yes=1 or no=2" "\n";
  cin >> yes;
  if(yes == 1)  
  {
   cout << "Enter number""\n";
   cin >> x;
   list.push_back(x);
   yes = 0;
   }
 if (yes == 2)
    more = false;
}

for (int i = 0; i <= list.size(); i++)
  cout << list[i]

Do you have numbers? yes=1 or no=2
1
Enter number
10.1234
Do you have numbers? yes=1 or no=2
1
Enter number
20.3456
Do you have numbers? yes=1 or no=2
2
Printing out vector values
10.1234
20.3456

#include <iostream>
#include <vector> 
 
using std::cin;
using std::cout;
using std::endl;
using std::vector;
 
int main()
{
  vector<double> myVector;
  bool more = true;
  while (more)
  {
    double x;
    int yes;
    cout << "Do you have numbers? yes=1 or no=2" "\n";
    cin >> yes;
    if(yes == 1)  
    {
      cout << "Enter number""\n";
      cin >> x;
      myVector.push_back(x);
      yes = 0;
    }
    if (yes == 2)
      more = false;
  }
 
  cout << "Printing out vector values " << endl; 
  for (unsigned int i = 0; i < myVector.size(); i++)
    cout << myVector[i] << endl;
 
  return 0;
}

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