std::basic_ios<CharT,Traits>::fill

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< cpp‎ | io‎ | basic ios
 
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std::basic_ios
 
CharT fill() const;
 (1)
CharT fill( CharT ch );
 (2)

Manages the fill character used to pad the output conversions to the specified field width.

1) returns the current fill character
2) sets the fill character to ch, returns previous value of the fill character

Parameters

ch - the character to use as fill character

Return value

the fill character before the call to the function.

Example

Run this code
#include <iostream>
#include <iomanip>
 
int main ()
{
  std::cout << "With default setting : [" << std::setw(10) << 40 << "]\n";
  char prev = std::cout.fill('x');
  std::cout << "Replaced '" << prev << "' with '"
            << std::cout.fill() << "': [" << std::setw(10) << 40 << "]\n";
}

Output: 

With default setting : [        40]
Replaced ' ' with 'x': [xxxxxxxx40]

See also

 changes the fill character
(function template)
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