sample cobol program to read and write file

Writehdfs: PackageAA;ImportJava.io.*;Importorg.apache.hadoop.conf.Configuration;Importorg.apache.hadoop.fs.*; Public classWritehdfs { Public Static voidMain (string[] args) {Configuration conf=NewConfiguration (); Try{FileSystem fs=filesystem.get (conf); Path F=NewPath ("Ttt.txt"); System.out.println (Fs.isfile (f)); System.out.println (F.tostring ()); Fsdataoutputstream OS= Fs.create (F,true); Os.writechars ("Test"); Os.flush (); Os.close (); } Catch(IOEx

\n", bytes,0,0,0,0,0);Close (FD);return ERROR;}Close (FD);FD = open ("/d/my.txt", o_rdwr,0);if (fd = =-1) {Logmsg ("Error:open file failed\r\n", 0,0,0,0,0,0);return ERROR;}bytes = Read (fd,revbuf,sizeof (REVBUF));Logmsg ("read%d bytes data\r\n", bytes,0,0,0,0,0);REVBUF[9] = ' + ';Logmsg ("read%d bytes data, and

In the development of PHP website, there are usually two ways to store data, a text file storage, such as TXT file, a database storage, such as MySQL, compared to database storage, file storage does not have any advantages, but the file read and

Note: Due to typographical issues, correct the changes now. 1. store files to the local default address 1 Public VoidSave (string filename, string content)ThrowsException2{3Fileoutputstream outstream = context. openfileoutput (filename, context. mode_private );4Outstream. Write (content. getbytes ());5Outstream. Close ();6} First, create a file output stream object whose value is equal to the return va

A programming case Introduction This case is based on the console project, create a specialized demo class CDemo, realize the binary file read and write serialization operation, the specific code is as follows: 1 CDemo class Definition: Class CDemo { Public void CreateFile (); CDemo (); Virtual ~cdemo (); void Serialize (CArchive ar); void WriteFile (); void Rea

filename) { int start = filename. LastIndexOf ("."); int length = filename. Length; string postfix = filename. Substring (start, Length-start); return postfix; } #endregion #region Write a file /**************************************** * Function Name: WriteFile * Function Description: Write the file, will

. entry Entry: map. entrySet () {if (entry. getValue () = 1) {csReturn. add (entry. getKey () ;}} return csReturn;}/*** get different elements of the two sets, remove duplicate ** @ param collmax * @ param collmin * @ return */@ SuppressWarnings ({"unchecked"}) public static Collection getDiffentNoDuplicate (Collection collmax, Collection collmin) {return new HashSet (getDiffent (collmax, collmin);} public static void main (String [] args) {unionTxt ("e:/test/input1.txt", "e

(pszfilename,cfile::typetext| Cfile::modereadwrite), fileexception) { myfile.seektobegin (); CString str1; Myfile.readstring (STR1); CString str2; Myfile.readstring (STR2); AfxMessageBox (STR1+STR2); } else { TRACE ("Can ' t Open file%s,error=%u/n", pszfilename,fileexception.m_cause); } Myfile.close (); Program run Result: Set breakpoints for

= inbuf;/* Send the request to the kernel and get the result back */PACKETS.MSGS = messages;PACKETS.NMSGS = 2;if (IOCTL (file, I2c_rdwr, packets) Perror ("Unable to send data");return 1;}*val = Inbuf;return 0;}int main (int argc, char **argv) {int i2c_file;Open a connection to the I²c userspace control file.if ((i2c_file = open (I2c_file_name, O_RDWR)) Perror ("Unable to open I²c control file");Exit (1);}i

: all_the_text = file_object.read( )finally: file_object.close( ) Read the fixed byte file_object = open ('abinfile', 'RB ') try: while True: chunk = file_object.read(100) if not chunk: break do_something_with(chunk)finally: file_object.close( ) Read each row list_of_all_the_lines = file_object.readlines ()If the file is a text

2.6 (calculate the sum of all integers) write a program, read an integer between 0-, and add the numbers of All integers with the modified integer. Example: 932, = 14 ;, Import java. util. extends; public class Demo_1 {public static void main (String [] agrs) {extends input = new evaluate (System. in); System. out. print ("Enter a number 0 and 1000:"); int numbe

The file has two open modes: text mode and binary modeWhen the C language program to the file operation, the first open the file in a certain mode, set up a cache (read-write mode two), the buffer has the control information of th

,page_size); ret = Bdev_write_one_page (BDEV,NR, (void *) pages_write_addr); if (ret) PRINTK ("Blk write Failed" );#endif{ printk ("nr=%d\n", nr ); ret = Bdev_read_one_page (BDEV,NR, (void *) pages_addr );if (ret) PRINTK ("Blk read failed" );}PRINTK ("after bdev_read_one_page\n");//PRINTK ("Get data:%0x,%0x\n,", pages_addr[510],pages_addr[511]);for (i = 0; i {PRINTK ("%02x", (unsigned char) pages_add

Read the file:The traditional method of reading. All read out, processed by line:Fp=open ("./ps.txt", "R");Alllines=fp.readlines ();Fp.close ();For Eachline in Alllines:Print EachlineThe recommended read method, using a file iterator, is to read and display only one row at a

Questions and codes:Read and run the following two programs, respectively, using Notepad and binary reader (please download the binary Viewer program, or use the DOS debug program, and Baidu usage). View its contents and understand how the file is stored.(1)#include Operation Result:(2)#include Operation Result:Summary of Knowledge points:outfileWrite is written

。。。。 Reading the contents of a TXT file Import Java.io.BufferedReader; Import Java.io.File; Import Java.io.FileReader; /** * May 11, 2016 * This class simulates the process of reading content from a TXT file * @author wujiejecket * */Public class Printfromtxt { Public static void Main (string[] args) throws Exception { //Read all

has been feeling on the file read and write and flow of the use of unfamiliar, recently wrote a project just need to read the CSV file data and create a new CSV file, so read some of th

setting, such as _fmode=o_text; set the default open mode to text mode, and _fmode=o_binary, set the default open mode is Binary mode.We can also specify an open pattern in the pattern string, such as "RB" to open a read-only file in binary mode, "W+t" or "wt+" to open a read/write

Common functions for file operationsfopen () Open stream fclose () closes the stream FPUTC () writes a character into the stream fgetc () reads a character from the stream fseek () navigates to the specified character in the stream fputs () writes the string to the stream fgets () Reads a line from the stream or specifies a character fprintf () output to stream fscanf () from the stream in a format read