stream manipulator for set precision closing zeroes?

  • Thread starter Thread starter Peteroid
  • Start date Start date
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Peteroid

In the same spirit as setw( ) and setprecision( ), is there a stream
manipulator that will fill in closing-zeroes on those fractions with a given
setprecision( )?

For example, if setprecision(3) is used, I want '1' to be displayed as
"1.000", '1.2' to be displayed as "1.200", '1.23' to be displayed as
"1.230", '1.234' to be displayed as "1.234", and '1.2345' to be displayed as
"1.234" (or the rounded version "1.235" is ok too).

Thanx in advance!!!

[==Peteroid==]
 
Peteroid said:
In the same spirit as setw( ) and setprecision( ), is there a stream
manipulator that will fill in closing-zeroes on those fractions with a given
setprecision( )?

For example, if setprecision(3) is used, I want '1' to be displayed as
"1.000", '1.2' to be displayed as "1.200", '1.23' to be displayed as
"1.230", '1.234' to be displayed as "1.234", and '1.2345' to be displayed as
"1.234" (or the rounded version "1.235" is ok too).
Click to expand...

std::fixed and std::ios_base::fixed are what you want. e.g.

#include <iostream>
#include <iomanip>

int main()
{
std::cout << std::setprecision(3) << std::fixed
<< 1.23456 << ' ' << 1.2 << '\n';
}

Tom
 
Hi Tom,

Thanks! :)

[==Peteroid==]

Tom Widmer said:
std::fixed and std::ios_base::fixed are what you want. e.g.

#include <iostream>
#include <iomanip>

int main()
{
std::cout << std::setprecision(3) << std::fixed
<< 1.23456 << ' ' << 1.2 << '\n';
}

Tom
Click to expand...
 
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