Is there a convinient way to format a double into a string?

[bonho]

Basically I would like to have the format as "0.###"

which means it shows up to 3 decimals if they are all non-zero. Otherwise it won't display the decimal at all.

For instance,

1234.56789 --> 1234.568
1234.56989 --> 1234.57
1234.99951 --> 1235
1234.00049 --> 1234

Ideally it would also do comma separate as 100,000,000 for 100 million.

Thanks.

[jlb]

No there is no magical standard way of formatting the code as you seem to desire. You'll need to write code to do the formatting.

[Chervil]

Use a stringstream, then carry out additional manipulation of the resulting string

    ostringstream os;
    os.precision(3);
    os << fixed << n;
    string temp = os.str();