Standard streams (ITI8510) - Redigeerimiste ajalugu

Irve – 16. september 2016, kell 06:21

2016-09-16T06:21:05Z

←Vanem redaktsioon		Redaktsioon: 16. september 2016, kell 08:21
16. rida:		16. rida:
	* These tasks are simple enough to figure out without getting off-the-shelf answer from google. Your brain will thank you. If you still want to copy example code -- do it by hand at least. It's pointless waste of your own time to copy-paste and fix code you found online.		* These tasks are simple enough to figure out without getting off-the-shelf answer from google. Your brain will thank you. If you still want to copy example code -- do it by hand at least. It's pointless waste of your own time to copy-paste and fix code you found online.
	* You have variables named stdin, stdout and stderr which correspond to streams which the system opens for you upon program launch. They arrive with inclusion of stdio.h.		* You have variables named stdin, stdout and stderr which correspond to streams which the system opens for you upon program launch. They arrive with inclusion of stdio.h.
	* Standard streams can be redirected on the command-line using < > 2> and \| signs. You should know them, so find out what they do.		* Standard streams can be redirected on the command-line using < > 2> and \| signs. You should know them, so find out what they do. A useful keyword is "linux pipes".

	* If the task seems too simple: try the [[Nonblocking_IO_(ITI8510)\|Nonblocking IO]] version of the my_cat utility.		* If the task seems too simple: try the [[Nonblocking_IO_(ITI8510)\|Nonblocking IO]] version of the my_cat utility.

Irve – 9. september 2015, kell 06:10

2015-09-09T06:10:18Z

←Vanem redaktsioon		Redaktsioon: 9. september 2015, kell 08:10
16. rida:		16. rida:
	* These tasks are simple enough to figure out without getting off-the-shelf answer from google. Your brain will thank you. If you still want to copy example code -- do it by hand at least. It's pointless waste of your own time to copy-paste and fix code you found online.		* These tasks are simple enough to figure out without getting off-the-shelf answer from google. Your brain will thank you. If you still want to copy example code -- do it by hand at least. It's pointless waste of your own time to copy-paste and fix code you found online.
	* You have variables named stdin, stdout and stderr which correspond to streams which the system opens for you upon program launch. They arrive with inclusion of stdio.h.		* You have variables named stdin, stdout and stderr which correspond to streams which the system opens for you upon program launch. They arrive with inclusion of stdio.h.
	* Standard streams can be redirected on the command-line using < > 2> and \| signs. You should know find out what they do.		* Standard streams can be redirected on the command-line using < > 2> and \| signs. You should know them, so find out what they do.

	* If the task seems too simple: try the [[Nonblocking_IO_(ITI8510)\|Nonblocking IO]] version of the my_cat utility.		* If the task seems too simple: try the [[Nonblocking_IO_(ITI8510)\|Nonblocking IO]] version of the my_cat utility.

Irve – 11. september 2013, kell 17:18

2013-09-11T17:18:18Z

←Vanem redaktsioon		Redaktsioon: 11. september 2013, kell 19:18
17. rida:		17. rida:
	* You have variables named stdin, stdout and stderr which correspond to streams which the system opens for you upon program launch. They arrive with inclusion of stdio.h.		* You have variables named stdin, stdout and stderr which correspond to streams which the system opens for you upon program launch. They arrive with inclusion of stdio.h.
	* Standard streams can be redirected on the command-line using < > 2> and \| signs. You should know find out what they do.		* Standard streams can be redirected on the command-line using < > 2> and \| signs. You should know find out what they do.

			* If the task seems too simple: try the [[Nonblocking_IO_(ITI8510)\|Nonblocking IO]] version of the my_cat utility.

Irve – 11. september 2013, kell 17:17

2013-09-11T17:17:02Z

←Vanem redaktsioon		Redaktsioon: 11. september 2013, kell 19:17
10. rida:		10. rida:
	:* Copy a file		:* Copy a file
	:* Create and edit a text file		:* Create and edit a text file
	# Fix your first program so that it shows error messages to stderr using either [http://linux.die.net/man/3/fprintf fprintf() or [[http://linux.die.net/man/3/perror perror()]		# Fix your first program so that it shows error messages to stderr using either [http://linux.die.net/man/3/fprintf fprintf()] or [http://linux.die.net/man/3/perror perror()]

	== Hints ==		== Hints ==

Irve: Uus lehekülg: '{{iti8510}} ''This exercise is about standard streams. While we will return to the specific inputs, it is vital to understand how the streams work for most of the exercises.'' =...'

2013-09-11T13:54:51Z

Uus lehekülg: '{{iti8510}} ''This exercise is about standard streams. While we will return to the specific inputs, it is vital to understand how the streams work for most of the exercises.'' =...'

Uus lehekülg

{{iti8510}}
''This exercise is about standard streams. While we will return to the specific inputs, it is vital to understand how the streams work for most of the exercises.''

== Task ==

# Write a program named show_input which reads file 'input.txt' ( [http://linux.die.net/man/3/fopen fopen()], [http://linux.die.net/man/3/fread fread()], [http://linux.die.net/man/3/fclose fclose()] ) and displays it to the standard output (use [http://linux.die.net/man/3/fwrite fwrite()] or [http://linux.die.net/man/3/fprintf fprintf] instead of [http://linux.die.net/man/3/printf printf()] and use ''stdout'' stream for output).
# Write a program named my_cat which reads from stdin and then outputs each line to stdout using only [http://linux.die.net/man/3/fgetc fgetc()] and [http://linux.die.net/man/3/fputc fputc()] functions.
: Find a way to use the program to:
:* Show a text file
:* Copy a file
:* Create and edit a text file
# Fix your first program so that it shows error messages to stderr using either [http://linux.die.net/man/3/fprintf fprintf() or [[http://linux.die.net/man/3/perror perror()]

== Hints ==

* These tasks are simple enough to figure out without getting off-the-shelf answer from google. Your brain will thank you. If you still want to copy example code -- do it by hand at least. It's pointless waste of your own time to copy-paste and fix code you found online.
* You have variables named stdin, stdout and stderr which correspond to streams which the system opens for you upon program launch. They arrive with inclusion of stdio.h.
* Standard streams can be redirected on the command-line using < > 2> and | signs. You should know find out what they do.