How to print double without trailing zeros and without scientific format

Asked Feb 18 '15 at 12:37

Active Feb 18 '15 at 12:37

Viewed 662 times

As far as I can gather the output format can either be in fixed, scientific or default mode.

I don't want scientific mode, so that is out.

When using fixed mode (std::fixed) std::cout.precision(15) will leave trailing zeros.

When using default mode (std::defaultfloat) std::cout.precision(15) doesn't affect anything - e.g. after 6 decimal places it still switches to scientific format.

Basically, I would like

std::cout << 0.1 << std::endl;
std::cout << 0.0000001 << std::endl;

to print

0.1
0.0000001

asked Feb 18 '15 at 12:37

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What does it currently print? – ecatmur Feb 18 '15 at 12:40
Depends. As given, it prints 0.1 and 1e-07. With std::fixed, it prints 0.1000000 and 0.0000001. – Cookie Feb 18 '15 at 12:41
1

@Cookie You may also be interested in my question here: http://stackoverflow.com/questions/25403713/set-precision-and-clip-trailing-zeros-but-never-print-exponent – Jonathan Mee Feb 18 '15 at 13:08

How to print double without trailing zeros and without scientific format

0 Answers0