How to turn off scientific notation for double when appending it to ostringstream?

Question

I have a small function which converts double to std::string:

std::string convertDoubleToString( double value ) {
    std::ostringstream ostr;
    ostr << value;
    return ostr.str();
}

I don't want to use the scientific notation here. How can I do it in this case? I can use std::fixed or cout.setprecision but it works for std::cout only but how can I use it for my case?

What makes you think it only works for `cout`? Have you tried it? — NathanOliver, Jul 26 '17 at 11:42
A stream is a stream is a stream... And all streams basically works the same with regards to [manipulators](http://en.cppreference.com/w/cpp/io/manip). — Some programmer dude, Jul 26 '17 at 11:43
By the way, you probably want to take a look at [`std::to_string`](http://en.cppreference.com/w/cpp/string/basic_string/to_string). — Some programmer dude, Jul 26 '17 at 11:44

score 1 · Accepted Answer · answered Jul 26 '17 at 11:45

1

Use std::fixed manipulator like this:

 ostr << std::fixed << value;

answered Jul 26 '17 at 11:45

ikleschenkov

972
5
11

Didn't know it works for all streams as well. Worked this way: *ostr << std::fixed << std::setprecision( 10 ) << value;* - without setprecision it returns too "short" value :) – JavaRunner Jul 26 '17 at 11:50

How to turn off scientific notation for double when appending it to ostringstream?

1 Answers1