cin.tie c++

The cin.tie function in C++ is used to tie the standard input stream (cin) to an output stream. This means that any input operation on cin will flush the output stream before the input operation is performed. The function returns the output stream that was tied to cin before the call. This allows for synchronization between the input and output operations. It is commonly used to ensure that the output stream is flushed before input is accepted, particularly when mixing input from the keyboard and output to the console.