explicit basic_ios(basic_streambuf<charT, traits>* sb);
Effects: Constructs an object of class basic_ios, assigning initial values to its member objects by calling init(sb).
basic_ios();
Effects: Constructs an object of class basic_ios ([ios.base.cons]) leaving its member objects uninitialized. The object shall be initialized by calling basic_ios::init before its first use or before it is destroyed, whichever comes first; otherwise the behavior is undefined.
~basic_ios();
void init(basic_streambuf<charT, traits>* sb);
Postconditions: The postconditions of this function are indicated in Table 113.
| Element | Value |
| rdbuf() | sb |
| tie() | 0 |
| rdstate() | goodbit if sb is not a null pointer, otherwise badbit. |
| exceptions() | goodbit |
| flags() | skipws | dec |
| width() | 0 |
| precision() | 6 |
| fill() | widen(' ') |
| getloc() | a copy of the value returned by locale() |
| iarray | a null pointer |
| parray | a null pointer |