Binary overloaded operator= - c++

Question

So I'm trying to write and read from a file, using std::ostream_iterator and std::iostream_iterator. The process of writng works well without any mistakes. But as for reading I'm lost. The error, I have is:
1>c:\program files (x86)\microsoft visual studio 14.0\vc\include\xutility(2316): error C2678: binary '=': no operator found which takes a left-hand operand of type 'const WRstruct' (or there is no acceptable conversion)
and it says that:
c:\users\xxxxxxx\desktop\ttttt\ttttt\wrstruct.h(21): note: could be 'WRstruct &WRstruct::operator =(const WRstruct &)'
1> c:\program files (x86)\microsoft visual studio 14.0\vc\include\xutility(2316): note: while trying to match the argument list '(const WRstruct, WRstruct)'
What is the correct way of overloading operator=?
class:
#include <iostream>
#include <string>
#include <fstream>
#include <vector>
#include <iterator>
#include <istream>
class WRstruct
{
private:
std::string name;
std::string number;
friend std::ostream& operator<<(std::ostream&, const WRstruct&);
friend std::istream& operator >> ( std::istream& is, WRstruct&);
public:
WRstruct(){};
void write();
void read();
~WRstruct(){};
};
std::ostream& operator<<(std::ostream& os, const WRstruct& p)
{
os << "User Name: " << p.name << std::endl
<< "Name: " << p.number << std::endl
<< std::endl;
return os;
}
std::istream& operator >> (std::istream& is, WRstruct& p)
{
is >> p.name>>p.number;
return is;
}
Methods:
void WRstruct::write()
{
std::vector<WRstruct> vecP;
std::copy(std::istream_iterator<WRstruct>(std::cin),
std::istream_iterator<WRstruct>(), std::back_inserter(vecP));
std::ofstream temp("temp.txt", std::ios::out);
std::ostream_iterator<WRstruct>temp_itr(temp, "\n");
std::copy(vecP.begin(), vecP.end(), temp_itr);
}
void WRstruct::read()
{
std::vector<WRstruct> vec;
std::ifstream readFile("temp.txt");
std::istream_iterator<WRstruct> istr(readFile);
copy(vec.begin(), vec.end(), istr);
std::istream_iterator<WRstruct> end_istr;
copy(istr, end_istr, back_inserter(vec));
std::ostream_iterator<WRstruct> osIter(std::cout," ");
copy(vec.begin(),vec.end(),osIter);
}
and main():
#include <iostream>
#include "WRstruct.h"
int main()
{
WRstruct r;
r.write();
//r.read();
return 0;
}

Answer 1

As far as I understand, the meaning of your function WRstruct::read is "reading all the data from 'temp.txt' and writing it to console". BTW, it's strange that function read prints something, so consider naming your function accordingly.
To read something from file using istream_iterator, you should create a pair of iterators (one pointing to the beginning of the file, and another empty) and use std::copy. So, the reading part of your function should look like
std::vector<WRstruct> vec;
std::ifstream readFile("temp.txt");
std::istream_iterator<WRstruct> istr(readFile);
std::istream_iterator<WRstruct> end_istr;
copy(istr, end_istr, back_inserter(vec));
So, you can just comment or delete one line from WRstruct::read to get rid of compilation error.