int to string - found method not working

Hi,

I tried the following code to convert an int to a string:

Code:

---

int i = 5678;
string s;
stringstream out;
out << i;
s = out.str();

---

But it returns an empty string! If I print the "out" variable using

Code:

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cout << out << endl;

---

It prints "0". What could possibly be wrong? I'm using Mac OS X 10.6.1 and gcc version 4.2.1.

Try printing s instead of out and you will probably find that out.str() did not return an empty string.

you can do lyke this

int val=2635;
char s[50];
cout<<itoa(val,s,10)<<endl;

is that you want?

Quote:

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Originally Posted by joseCarlos

you can do lyke this

int val=2635;
char s[50];
cout<<itoa(val,s,10)<<endl;

is that you want?

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Except that's C and not defined in ANSI-C nor a part of C++?

Quote:

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Originally Posted by laserlight

Try printing s instead of out and you will probably find that out.str() did not return an empty string.

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Sorry if I wasn't clear about this.. I have already tried printing out 's', and that revealed an empty string (which is why I concluded that the code returns an empty string).

Quote:

---

Originally Posted by joseCarlos

you can do lyke this

Code:

---

int val=2635;
char s[50];
cout<<itoa(val,s,10)<<endl;

---

is that you want?

---

No that is not what I want.. I want to convert the int directly to a C++ string (of the string class)

Quote:

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Originally Posted by epb

Sorry if I wasn't clear about this.. I have already tried printing out 's', and that revealed an empty string (which is why I concluded that the code returns an empty string).

---

Okay, so given this program:

Code:

---

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

int main()
{
    using namespace std;
    int i = 5678;
    string s;
    stringstream out;
    out << i;
    s = out.str();
    cout << s << endl;
}

---

Compile and run it. What output do you get?

Quote:

---

Originally Posted by laserlight

Okay, so given this program:

Code:

---

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

int main()
{
    using namespace std;
    int i = 5678;
    string s;
    stringstream out;
    out << i;
    s = out.str();
    cout << s << endl;
}

---

Compile and run it. What output do you get?

---

I get no output. If I add

Code:

---

cout << out << endl;

---

after the assignment of 'i' to 'out' I get '0' as a single output.

Quote:

---

Originally Posted by epb

I get no output. If I add

Code:

---

cout << out << endl;

---

after the assignment of 'i' to 'out' I get '0' as a single output.

---

Check this out

Code:

---

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

int main()
{
  using namespace std;
  int i = 5678;
  string s;
  stringstream out;
  out << i;
  cout << out.str() << endl;
  s = out.str();
  cout << s << endl;
}

---

Quote:

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Originally Posted by RockyMarrone

Check this out

Code:

---

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

int main()
{
  using namespace std;
  int i = 5678;
  string s;
  stringstream out;
  out << i;
  cout << out.str() << endl;
  s = out.str();
  cout << s << endl;
}

---

---

This is also gives me an empty output :(

EDIT: The output is two empty lines, so I guess you can say that the output is not completely empty

Quote:

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Originally Posted by epb

This is also gives me an empty output :(

EDIT: This gives me two empty lines, so I guess you can say that the output is not entirely empty

---

I don't know why you are not getting the output but see my shell here

and for your information i m on linux 2.6.29.4 and gcc 4.3.2

Quote:

---

[rocky@localhost test]$ ls
a.out test.cc
[rocky@localhost test]$ cat test.cc

Code:

---

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

int main()
{
  using namespace std;
  int i = 5678;
  string s;
  stringstream out;
  out << i;
  cout << out.str() << endl;
  s = out.str();
  cout << s << endl;
}

---

[rocky@localhost test]$ g++ test.cc
.[rocky@localhost test]$ ./a.out
5678
5678

---

According to this thread:

Cocoabuilder - (Dmitry Markman) ostringstream problem with Xcode 3.2

Assuming you're using Xcode, try setting it to build as Release rather than Debug?

Quote:

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Originally Posted by epb

after the assignment of 'i' to 'out' I get '0' as a single output.

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hmm... that should imply that the stringstream is in a failed state, which is strange.

Quote:

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Originally Posted by JacobN

According to this thread:

Cocoabuilder - (Dmitry Markman) ostringstream problem with Xcode 3.2

Assuming you're using Xcode, try setting it to build as Release rather than Debug?

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Yes I am using Xcode. And that worked! Thanks :)