The IO Library of the C + + standard library

Personal Understanding:

1) Formation: program--flow--a structure of other equipment. Other devices can refer to: programs, files, external devices and everything else.

2) input stream: from stream to program. Another understanding: Other devices to the stream. Individuals tend to use the former. Output is similar.

3) The basic stream is: basic stream (iostream), file Stream (Iofstream), character stream (Iostringstream). Use Baidu or Google specifically.

Some details:

1) out mode (ofstream:out) opens the file and deletes the existing file data.

2) iostream name: Console io. probably because this stream class is associated to the console by default?

The IO Library of the C + + standard library