Float to string

Hello;

I have a float in the variable

float x_lab;

I need to convert this value to a string and store the string as a variable for later use. The precision needs to be to two decimal places .. positive or negative values could be in x_lab. And x_lab may change and be output through the string later in the program. I must convert to a string, b/c i will actually be passing the string to an openGL call.

Please help. I need the fastest and simplest way to do this


Thanks

char buf[asmuchasyouneed];
sprintf(buf, "%.2f", x_lab);

[edit] oops, forgot this was the C++ forum.

Code:

---

#include <string>
#include <sstream>

string str;
stringstream stream(str, ios_base::out);

stream.precision(2);
stream << x_lab;

---

I think this might work but it's late so someone else has to take over for me.

Thank You this worked perfect

Are you sure? The first one does, but I looked up my stringstream version and it seems I was way off. Here's a valid code example to clean up my mess:

Code:

---

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

using namespace std;

int main ()
{
        float x_lab = 5.24;
        ostringstream stream;

        stream.precision(2);
        stream << fixed << x_lab;
        cout << stream.str();

        return 0;
}

---