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how to set precision for double in C++
Posted: Mon Apr 18, 2016 2:27 pm
by Ktanger
Hi
Please check below MQL4 programming first:
double USOilAskStart = MarketInfo("USOIL", MODE_BID);
double UKOilAskStart = MarketInfo("UKOIL", MODE_BID);
double PriceGapStart = UKOilAskStart - USOilAskStart;
if (NormalizeDouble(PriceGapStart, 3) >= 1.500)
{
...
}
the question is:
I want to find solution in C++ to set precision for double data like MQL4 above "NormalizeDouble(PriceGapStart, 3)" so that i can compare the result, any one can help me?
Re: how to set precision for double in C++
Posted: Mon May 09, 2016 11:49 pm
by violajsilver
You can set the precision directly on std::cout and used the std::fixed format specifier.
Code: Select all
double d = 3.14159265358979;
cout.precision(17);
cout << "Pi: " << fixed << d << endl;
You can #include <limits> to get the maximum precision of a float or double.
Code: Select all
#include <limits>
typedef std::numeric_limits< double > dbl;
double d = 3.14159265358979;
cout.precision(dbl::max_digits10);
cout << "Pi: " << fixed << d << endl;
Re: how to set precision for double in C++
Posted: Wed Aug 31, 2016 4:21 am
by mark1205
std::cout << std::setprecision (std::numeric_limits<double>::digits10 + 1)
<< 3.14159265358979
<< std::endl;
Re: how to set precision for double in C++
Posted: Thu Jan 25, 2018 1:24 am
by Jamesstewart01
thanks for the post
Re: how to set precision for double in C++
Posted: Sun Aug 04, 2019 3:41 am
by zoraya
Thanks for the information!
Re: how to set precision for double in C++
Posted: Tue Mar 31, 2020 6:34 am
by 4waytechnologies
Thanks for the information!
Re: how to set precision for double in C++
Posted: Fri Jul 23, 2021 1:55 am
by GragMilligan
std::cout << std::setprecision (std::numeric_limits<double>::digits10 + 1)
<< 3.14159265358979
<< std::endl;
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Re: how to set precision for double in C++
Posted: Sun Mar 20, 2022 3:05 am
by catcoin11
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Re: how to set precision for double in C++
Posted: Tue Feb 28, 2023 3:39 am
by AlenVeritaz
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