How to convert long to string in c++

[kirubagari]

Dear Expert,

Kindly need help on conversion of long to string.

long i = 123444788 to convert to string i.str();
  cout<< i.str();

This is not functioning.Kin dly help me

[Banfa]

Long is a POD type not a class so it has no methods.

But you don't need to convert to a string, the cout object knows how to handle longs so you can just

    cout << i;

[whodgson]

a question to Banfa:
But assuming the OP wants to convert the long to a string - how would you do that?

[johny10151981]

you can follow several ways,
like

1. ltoa
2.

char temp[20];
long ld;
sprintf(temp,"%ld",ld);

[Banfa]

Yes or you could do it the C++ way using a string stream. An ostringstream acts exactly like the cout object so if you know how to use one you know how to use both.

#include <sstream>
#include <iostream>
#include <string>

using namespace std;

int main()
{
    long i = 123444788;
    ostringstream oss;

    oss << i.str();

    string myString = oss.str();

    cout << myString;

    return 0;
}

In our systems I have started making methods to dump an objects status (mainly for debugging) that takes ostream& as an input. ostream is the base class of cout, cerr, clog, ofstream and ostringstream (see http://www.cplusplus.com/reference/iostream/) and an ostream& can be used exactly as you would use cout. In this way I can send the object dump directly to the screen, directly to a file or into a string for the code to do something else with (transmit over a network for example).

The objects dumping there status do not need to know (on the whole) where the out is going, only that output is required. This is a fine example of the polymorphic nature of C++.

[whodgson]

Thanks Banfa...I need to become more familiar with this subject.