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

int main() {

int dynamic_variable = 4;
double *float_array;
float_array= new double [dynamic_variable];
stringstream ss1("5.1,2.1,3.6,4.8");
            int count = 0;
            string s1;
            string s2= "2.1";
            while(getline(ss1,s1,','))
            {
                float_array[count] =  atof(s1.c_str());
                count++;
            }

for ( int cnt = 0; cnt < dynamic_variable; ++ cnt ) {
std::cout << float_array[ cnt ] << '\n';
}
}