Reading a file into a vector of class objects - c++

Question

I have given it a few tries based on what I've read on numerous forums and books I have here. More details about this assignment here with more code from it: Click- another question from StackOverflow
What exactly I need to do is create a file with CHotel objects and insert them in this vector m_hoteli.
As to why it isn't working, it is either not reading the string from the file and it's not filling the vector at all.
This is my file:
"Marina" 5 500
"Tulip" 4 400
"BlackSea" 3 300
"SwissBell" 5 600
class CComplex:CHotel
{
protected:
string m_complex;
vector<CHotel> m_hoteli;
public:
CComplex(){};
CComplex(string filename, string nComplex)
{
fstream file("filename.txt", ios::in);
CHotel temp(" ",0,0);
while (file >> temp)
{
m_hoteli.push_back(temp);
}
/* Second try:
m_complex = nComplex;
fstream in;
in.open(filename, ios::in);
string s;
while (getline(in, s))
{
CHotel h1(s);
m_hoteli.push_back(h1);
}
Third try:
m_complex = nComplex;
ifstream iStream(filename);
if (iStream.good())
{
copy(istream_iterator<CHotel>(iStream), istream_iterator<CHotel>(), back_inserter(m_hoteli));
}
}
*/
}
That's the CHotel code:
class CHotel : public CTurist
{
protected:
string hName;
int stars;
int beds;
map<CTurist, unsigned> Turisti;
public:
unsigned Sum = 0;
int br = 0;
CHotel(){};
CHotel(string hName2, int zvezdi, int legla)
{
hName = hName;
stars = zvezdi;
beds = legla;
}
friend istream& operator>>(std::istream& is, CHotel& e)
{
is >> e.hName >> e.stars >> e.beds;;
return is;
}
I just do this in the main: CComplex c1("filename.txt", "Complex1");

Answer 1

You are not using the filename parameter in the CComplex constructor, other than that your code should work.
fstream file(filename, ios::in);
Do you know how to step debug? Here is some info on debugging
Here is your full code, the only change is the filename parameter and the file should now be placed in c:\temp.
#include <iostream>
#include <string>
#include <map>
#include <vector>
#include <fstream>
using namespace std;
class CTurist
{
protected:
string tName;
int age;
public:
CTurist() {};
CTurist(string name, int age2)
{
tName = name;
age = age2;
}
bool operator<(const CTurist& e) const
{
return age < e.age;
}
friend ostream& operator<<(ostream& os, const CTurist&& e);
friend ifstream& operator>>(ifstream& is, CTurist&& e);
};
class CHotel : public CTurist
{
protected:
string hName;
int stars;
int beds;
map<CTurist, unsigned> Turisti;
public:
unsigned Sum = 0;
int br = 0;
CHotel() {};
CHotel(string hName2, int zvezdi, int legla)
{
hName = hName;
stars = zvezdi;
beds = legla;
}
friend istream& operator>>(std::istream& is, CHotel& e)
{
is >> e.hName >> e.stars >> e.beds;;
return is;
}
};
class CComplex :CHotel
{
protected:
string m_complex;
vector<CHotel> m_hoteli;
public:
CComplex() {};
CComplex(string filename, string nComplex)
{
fstream file(filename, ios::in);
CHotel temp(" ", 0, 0);
while (file >> temp)
{
m_hoteli.push_back(temp);
}
}
};
int main()
{
CComplex c1("C:\\temp\\file.txt", "Complex1");
system("pause");
return 0;
}
Try putting a breakpoint in main and step through your program with f11 and f10