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c++precision
H M Mohidul Islam
H M Mohidul Islam

Reputation: 87

C++ How to get fixed digit after decimal in cout<<

C++ How to get fixed digit after decimal in output???? Like f=123.456789 I want to show 123.46 in output.

Upvotes: 0

Views: 3398

Answers (4)

Achilles Rasquinha
Achilles Rasquinha

Reputation: 353

You'd require I/O manipulator for decimal precision.

#include <iomanip>
#include <iostream>

int main( )
{
    double foo = 123.456789L;

    std::cout << std::setprecision(2) << std::fixed << foo << std::endl;

    return 0;
}

Upvotes: 0

sp2danny
sp2danny

Reputation: 7644

you could also use boost::format 

#include <boost/format.hpp>

cout << boost::format("%.2f") % f << endl;

Upvotes: 0

Angad Singh
Angad Singh

Reputation: 1061

Another way is to use printf function, make sure that you include stdio.h file to use it,
printf("%0.2f",f);
Here %f is format specifier(float) and 0.2 between '%' and 'f' is used to set precision upto two decimal places.

Upvotes: 0

Adithya Upadhya
Adithya Upadhya

Reputation: 2375

You can use the setprecision() method in C++.

cout<<std::fixed<<std::setprecision(2)<<f;

Upvotes: 2

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