C ++ istream_iterator is not a member of std

Question

Can someone tell me why the code snippet below that I wrote during compilation keeps complaining istream_iterator is not a member of std, please can you tell? Thanks guys

#include <cstdlib>
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string.h>
#include <vector>
#include <fstream>
//#include<sstream>

struct field_reader: std::ctype<char> {

    field_reader(): std::ctype<char>(get_table()) {}

    static std::ctype_base::mask const* get_table() {
        static std::vector<std::ctype_base::mask>
            rc(table_size, std::ctype_base::mask());

        rc[';'] = std::ctype_base::space;
        return &rc[0];
    }
};


struct Stud{
    double VehicleID;
    double FinancialYear;
    double VehicleType;
    double Manufacturer;
    double ConditionScore;


    friend std::istream &operator>>(std::istream &is, Stud &s) {
        return is >> s.VehicleID >> s.FinancialYear >> s.VehicleType >>      s.Manufacturer >> s.ConditionScore;
    }

    // we'll also add an operator<< to support printing these out:
    friend std::ostream &operator<<(std::ostream &os, Stud const &s) {
        return os << s.VehicleID  << "\t"
                  << s.FinancialYear << "\t"
                  << s.VehicleType    << "\t"
                  << s.Manufacturer   << "\t"
                  << s.ConditionScore;
    }
};

int main(){
// Open the file:
std::ifstream in("VehicleData_cs2v_1.csv");

// Use the ctype facet we defined above to classify `;` as white-space:
in.imbue(std::locale(std::locale(), new field_reader));

// read all the data into the vector:
std::vector<Stud> studs{(std::istream_iterator<Stud>(in)),
 std::istream_iterator<Stud>()};

// show what we read:
for (auto s : studs)
    std::cout << s << "\n";
}

Therefore, if you notice a problem, let me know, because I can’t say it now, and I believe that I have included all the necessary include libraries

Answer 1

The error message may seem a bit erroneous, but this is the best the compiler could say. std::istream_iteratordeclared in the header file <iterator>, which causes your problem.

Just add it to your

#include <iterator>