This program reads information from a text file with an istream_iterator and initializes a vector with the data. Everything has been working fine, but when I created a constructor for the class to use for insertion into the vector, I get a compiler error involving the istream_iterator.
#include <vector>
#include <fstream>
#include <string>
#include <iterator>
#include <iostream>
#include <algorithm>
using namespace std;
struct Item {
string name;
int iid;
double value;
Item(string n, int id, double p) :name(n), iid(id), value(p) {}
/* ... */
};
struct namesort { // name function object
bool operator()(const Item& a, const Item& b) const
{ return a.name < b.name; }
};
struct idsort {
bool operator()(const Item& a, const Item& b) const
{ return a.iid < b.iid; }
};
struct valuesort {
bool operator()(const Item& a, const Item& b) const
{ return a.value > b.value; }
};
istream& operator>>(istream& in, Item& i)
{
in >> i.name >> i.iid >> i.value;
return in;
}
ostream& operator<<(ostream& out, const Item& o)
{
out << o.name << '\t' << o.iid << '\t' << o.value;
return out;
}
int main()
{
string file;
cin >> file;
ifstream is(file.c_str());
istream_iterator<Item> ii(is);
istream_iterator<Item> eos;
vector<Item> vi(ii,eos);
vector<Item>::iterator it = vi.begin();
sort(vi.begin(), vi.end(), valuesort());
vi.insert(it, Item("horse shoe", 99, 12.34));
vi.insert(it, Item("Canon S400", 9988, 499.95));
for (int i = 0; i < vi.size(); ++i)
cout << vi[i] << endl;
}The code works if you take out the constructor (and obviously the insert), but for some reason when I try to compile with the constructor I get this message.
C:\Program Files (x86)\CodeBlocks\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\include\c++\3.4.5\bits\stream_iterator.h|68|error: no matching function for call to `Item::Item()'|Any help is appreciated. Thanks