доделать программу с полутом мяча

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

int main()
{

    string path = "/home/user/text.txt";
    ifstream infile(path.c_str());
    string line;
    getline (infile,line);
    istringstream iny (line.c_str());
    float x, y, vx, vy, dt;
    iny >> x >> y >> vx >> vy >> dt;



    /*ofstream outfile;
    outfile.open (path.c_str());
    outfile << "hello world " << endl;
    outfile.close();*/
    return 0;

}