Example of reading in a file in C++

input.cc

#include "mcstats.h"

#include <assert.h>
#include <stdlib.h>
//#include <stdio>
#include <iostream>
#include <fstream>
#include <string>

using std::cout;
using std::endl;

int main()
{
        std::ifstream ifs;
        ifs.open("../maff/xlsm/sort.txt");
        std::string str;
        std::getline(ifs, str);
        cout << str << endl;
        int n = stoi(str);
        std::vector<double> ds;
        assert(n>0);
        for(int i=0; i<n; i++){
                std::getline(ifs, str);
                double d = stod(str);
                ds.push_back(d);
        }
        ifs.close();

        sortd(ds);
        for(int i=0; i<n; i++){
                cout << ds[i] << endl;
        }

        return EXIT_SUCCESS;
}