flush stdin

It turns out that flush was not carefully studied during C programming. Two days ago, the boss assigned me a question about whether the HTTP persistent connection is feasible, that is, the server continuously sends data to the HTTP client. I use CGI

1. buffered I/O, that is, standard I/O First, it should be clear that unbuffered I/O is only relative to buffered I/O, that is, standard I/O. Instead of using unbuffered I/O to read and write data to a disk, there is no buffer. In fact, the kernel

Directory Directory preface software Environment Knowledge Subprocess Popen Constructor constructor Class Popen parameter args calling program call shell instruction Stdinstdoutstderr real-time fetch subroutine output one time get all output of

Python daemon and script Singleton running details, python daemon This article mainly introduces the Python daemon process and script Singleton running. I think it is quite good. I will share it with you and give you a reference. Let's take a look

Python 3 uses subprocess to implement pipeline (pipe) Interactive Operation read/write communication, pythonsubprocess Here we use shell in Windows for example: From subprocess import * # because it is an example, all data is imported. To facilitate

The method of emptying buffers under Linux C standard specifies that the Fflush () function is used to refresh the output (stdout) cache. For input (stdin), it is undefined. But some compilers also define the implementation of Fflush (stdin), such

the stream-based operation will eventually call the read or write function for I/O operations. To make the program run most efficiently, the stream object typically provides buffers to reduce the number of times the system I/O library functions are

There are several basic input functions in the C language: Get character Series int fgetc (FILE *stream); int getc (FILE *stream); int GetChar (void); Get Row Series Char *fgets (char * restrict S, int n, FILE * restrict stream); Char *gets (char

There are several basic input functions in the C language://Get character SeriesintFGETC (FILE *stream);intGETC (FILE *stream);intGetCharvoid);//Get Row SeriesChar*fgets (Char* Restrict S,intN, FILE *restrict stream);Char*gets (Char*s);//may cause

'''Program 31] Question: Enter the first letter of the day of the week to determine the day of the week. If the first letter is the same, continue to judge the second letter. 1. Program Analysis: it is better to use the case statement. if the first