Converting int to std::string using istringstream inserts commas

Hi,

So I have a following function that converts int to string however it inserts the commas for thousands, millions, and so on. e.g. 65432 -> "65,432".
How do I make the conversion but have a string without commas?

I know it has to with locale but I cannot find it how to prevent it. Also I know about std::stoi() and atoi() but I do not want them.

Here is the code and thank you.

Code:

---

template <typename T>
std::string NumberToString ( T Number )
{
        std::stringstream ss;
        ss << Number;
        return ss.str();
}

---

Quote:

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Originally Posted by vincegata

Also I know about std::stoi() and atoi() but I do not want them.

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Why not?

Quote:

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Originally Posted by vincegata

Here is the code and thank you.

Code:

---

template <typename T>
std::string NumberToString ( T Number )
{
        std::stringstream ss;
        ss << Number;
        return ss.str();
}

---

---

Exactly what code is this? There is no way this function as it stands inserts commas into the numbers.

To place commas, you have to do a little more work than just streaming a number to a stringstream object (a call to imbue and the locale to use needs to be done).

Regards,

Paul McKenzie

Regards,

Paul McKenzie

This program using your template function

Code:

---

#include <iostream>
#include <sstream>
using namespace std;

template <typename T>
std::string NumberToString ( T Number )
{
        std::stringstream ss;
        ss << Number;
        return ss.str();
}

int main()
{
int n = 1234567;
double d = 34567.8;

        cout << NumberToString<int>(n) << endl;
        cout << NumberToString<double>(d) << endl;
        return 0;
}

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produces the output

Code:

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1234567
34567.8

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without any commas. So I'm confused as to how you think the function does insert commas? :confused:

Quote:

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Originally Posted by Paul McKenzie

There is no way this function as it stands inserts commas into the numbers.

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Quote:

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Originally Posted by 2kaud

So I'm confused as to how you think the function does insert commas?

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I have never seen it done myself, but there is locale support for numeric formatting with thousands place separators in the C++ standard library, so it may be the case that vincegata's default locale has this enabled and it is somehow actually in effect for stringstreams.