cpp/io/ios base/setf

Sets the formatting flags to specified settings.

@1@ Sets the formatting flags identified by. Effectively, the following operation is performed where  defines the state of internal formatting flags.

@2@ Clears the formatting flags under, and sets the cleared flags to those specified by. Effectively the following operation is performed where  defines the state of internal formatting flags.

Return value
The formatting flags before the call to the function