std::cin, std::wcin
Template:cpp/io/basic istream/sidebar Template:ddcl list begin <tr class="t-dsc-header">
<td><iostream>
<td></td> <td></td> </tr> <tr class="t-dcl ">
<td ><td > (1) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">
<td ><td > (2) </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end
The global objects Template:cpp and Template:cpp control input from a stream buffer of implementation-defined type (derived from Template:cpp), associated with the standard C input stream Template:cpp.
These objects are guaranteed to be constructed before the first constructor of a static object is called and they are guaranteed to outlive the last destructor of a static object, so that it is always possible to read from Template:cpp in user code.
Unless Template:cpp has been issued, it is safe to concurrently access these objects from multiple threads for both formatted and unformatted input.
Once Template:cpp is constructed, Template:cpp returns Template:cpp, and likewise, Template:cpp returns Template:cpp. This means that any formatted input operation on Template:cpp forces a call to Template:cpp if any characters are pending for output.
