Is ifs is a member function of ifstream class
 

Hi all,

can anyone tell me whether ifs function is a member function of ifstream.

in the statements below the ifs has been used like ........

ifstream ifs( g_pSystemEnvironment->GetTotAlmCountFileName() );

ifs >> m_nNoOfTotalAlarm;

i am not able to understand the code. could anyone help me out of it.

Thanx in advance.

Re: Is ifs is a member function of ifstream class
 

look at this example ...

#include <fstream>            • <fstream> header file

using namespace std;         – Use ifstream for input

int main()                         – Use ofstream for output

{

ifstream ifs;                      

ifs.open(“in.txtâ€?);              • Other methods 

ofstream ofs(“out.txtâ€?);     – open, is_open, close    

if (ifs.is_open() &&            – getline

ofs.is_open()){                – seekg, seekp  

int i;                              • File modes

ifs >> i;                          – in, out, ate, app, trunc, binary

ofs << i; 

}

ifs.close();

 ofs.close();

return 0;

}

--------------------------------------------------------------------------------

#include <iostream>         • <sstream> header file

#include <fstream>          – Use istringstream for input

#include <sstream>          – Use ostringstream for output

using namespace std;       

int main() {                      • Useful for scanning input

ifstream ifs(“in.txtâ€?);          – Get a line from file into string

if (ifs.is_open())                – Wrap string in a stream

{string line1, word1;          – Pull words off the stream

getline(ifs, line1);              • Useful for formatting output

istringstream iss(line1);      – Use string as format buffer

iss >> word1;                   – Wrap string in a stream

cout << word1 << endl;     – Push formatted values into stream

}                                    – Output formatted string to file

return 0;

}

Re: Is ifs is a member function of ifstream class
 

Here ifs is not a function. It is an object of type ifstream. It is being instantiated using a parameterized constructor (passing the result of the g_pSystemEnvironment->GetTotAlmCountFileName function as the parameter) instead of the default constructor.