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std::setfill

From cppreference.com
< cpp‎ | io‎ | manip
Defined in header <iomanip>
template< class CharT >
/*unspecified*/ setfill( CharT c );

When used in an expression out << setfill(c) sets the fill character of the stream out to c.

Contents

[edit] Parameters

c - new value for the fill character

[edit] Return value

Returns an object of unspecified type such that if out is the name of an output stream of type std::basic_ostream<CharT, Traits>, then the expression out << setfill(n) behaves as if the following code was executed:

out.fill(n);

[edit] Example

#include <iostream>
#include <iomanip>
int main()
{
    std::cout << "default fill: " << std::setw(10) << 42 << '\n'
              << "setfill('*'): " << std::setfill('*')
                                  << std::setw(10) << 42 << '\n';
}

Output:

default fill:         42
setfill('*'): ********42

[edit] See also

manages the fill character
(public member function of std::basic_ios) [edit]
sets the placement of fill characters
(function) [edit]
changes the width of the next input/output field
(function) [edit]