Sets the specified flags.
fmtflags setf(
fmtflags _Mask
);
fmtflags setf(
fmtflags _Mask,
fmtflags _Unset
);
Parameters
_Mask
The flags to turn on._Unset
The flags to turn off.
Return Value
The previous format flags
Remarks
The first member function effectively calls flags(_Mask | _Flags) (set selected bits) and then returns the previous format flags. The second member function effectively calls flags(_Mask & fmtfl, flags & ~_Mask) (replace selected bits under a mask) and then returns the previous format flags.
Example
// ios_base_setf.cpp
// compile with: /EHsc
#include <iostream>
int main( )
{
using namespace std;
int i = 10;
cout << i << endl;
cout.unsetf( ios_base::dec );
cout.setf( ios_base::hex );
cout << i << endl;
cout.setf( ios_base::dec );
cout << i << endl;
cout.setf( ios_base::hex, ios_base::dec );
cout << i << endl;
}
Output
10
a
10
a
Requirements
Header: <ios>
Namespace: std