c++ - Using stringstream precision to format floats but discarding zero-padding -

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i'm trying set precision (i.e. number of decimal places) of floats , long doubles 10, don't want them 0 padded. i.e.,

123456.789123456789 should give 123456.7891234568, 123456 should not give 123456.0000000000, rather 123456

so far i've narrowed down to:

long double mynumber; string mystring; ostringstream mystream; mystream.setf(ios::fixed,ios::floatfield); mystream.precision(10); mystream << mynumber; mystring = mystream.str();

i've tried fiddling setfill(' ') , std::ws can't hang of it. suggestions?

don't use ios::fixed ios::floatfield. that's causes padding. use setprecision.


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