digitalmars.D.learn - File Input

JV (7/7) May 07 2017 Hi guys

k-five (18/25) May 07 2017 First of all see here:

JV (14/41) May 07 2017 I'm kinda getting it but how do i write the stored user

k-five (27/42) May 07 2017 --------------------------------------------------------------

JV (10/40) May 08 2017 Yeah i understand it very much like the other language like C/C++

k-five (51/53) May 08 2017 ---------------------------------------------------

JV (3/13) May 08 2017 Thank you and i hope to see more of you collection about D's

k-five (7/9) May 08 2017 ---------------------------------------------------

JV (7/16) May 13 2017 Hey i'm not sure if i should create a new post for this but

k-five (5/11) May 14 2017 Can you say exactly what you need?
=?UTF-8?Q?Ali_=c3=87ehreli?= (15/19) May 14 2017 That's the normal behavior for reading into strings. If you want to read...

Suliman (2/9) May 07 2017 http://nomad.so/2015/09/working-with-files-in-the-d-programming-language...

JV <jrpv100997 yahoo.com> writes:

Hi guys

I'd like to know how to get an input from the user to be stored 
in a .txt file using import std.file and is it possible to 
directly write in a .txt file without using a variable to store 
the user input?

Thanks for the answer in advance my mind is kinda jumbled about 
this since im new to this language.

May 07 2017

k-five <vhsu30 yahoo.com> writes:

On Sunday, 7 May 2017 at 13:57:47 UTC, JV wrote:
 Hi guys

 I'd like to know how to get an input from the user to be stored 
 in a .txt file using import std.file and is it possible to 
 directly write in a .txt file without using a variable to store 
 the user input?

 Thanks for the answer in advance my mind is kinda jumbled about 
 this since im new to this language.

First of all see here:
https://dlang.org/phobos/std_stdio.html#.File

also:

import std.stdio; // for File

void main(){
	
	// an output file with name file.txt
	// w for writing
	auto ofs = File( "file.txt", "w" );

         // output file stream:
	ofs.write( stdin.readln() ); // get a line from console
	ofs.close();
}


cat file.txt:
This is the first line.


and for std.file:
https://dlang.org/phobos/std_file.html

May 07 2017

JV <jrpv100997 yahoo.com> writes:

On Sunday, 7 May 2017 at 15:16:58 UTC, k-five wrote:
 On Sunday, 7 May 2017 at 13:57:47 UTC, JV wrote:
 Hi guys

 I'd like to know how to get an input from the user to be 
 stored in a .txt file using import std.file and is it possible 
 to directly write in a .txt file without using a variable to 
 store the user input?

 Thanks for the answer in advance my mind is kinda jumbled 
 about this since im new to this language.

 First of all see here:
 https://dlang.org/phobos/std_stdio.html#.File

 also:

 import std.stdio; // for File

 void main(){
 	
 	// an output file with name file.txt
 	// w for writing
 	auto ofs = File( "file.txt", "w" );

         // output file stream:
 	ofs.write( stdin.readln() ); // get a line from console
 	ofs.close();
 }


 cat file.txt:
 This is the first line.


 and for std.file:
 https://dlang.org/phobos/std_file.html



I'm kinda getting it but how do i write the stored user 
input(string) varaible into a .txt??im getting confused since D 
has so many read and write

  ->sample below
         string num;
         auto attendance= File("studAttendance.txt","a+");

         writeln("Add Student Attendance");
         readf("%s ",&num);//im not sure if this is correct but 
assuming it works
                           //how do i write what is stored in num 
in the studAttendance.txt
                           //file??

         attendance.close();

May 07 2017

k-five <vhsu30 yahoo.com> writes:

On Sunday, 7 May 2017 at 15:59:25 UTC, JV wrote:
 On Sunday, 7 May 2017 at 15:16:58 UTC, k-five wrote:
 On Sunday, 7 May 2017 at 13:57:47 UTC, JV wrote:


 I'm kinda getting it but how do i write the stored user 
 input(string) varaible into a .txt??im getting confused since D 
 has so many read and write

  ->sample below
         string num;
         auto attendance= File("studAttendance.txt","a+");

         writeln("Add Student Attendance");
         readf("%s ",&num);//im not sure if this is correct but 
 assuming it works
                           //how do i write what is stored in 
 num in the studAttendance.txt
                           //file??

         attendance.close();

--------------------------------------------------------------

You have the right for confusing :) there is many read and write 
names. But I assumed you are familiar with [Type] and [Object] 
concept.

in:
auto output_file_stream = File( "file.txt", "w" );

auto = File              == A type
File( "file.txt", "w" ); == Constructor

So this type has its own property, like read for "r" mode and 
write for "w" mode.

So you should use output_file_stream.write(), not readf or so on.

Still I am very new in D, but this is the same concept in other 
language like C++

in C++:
#include <iostream>
#include <fstream>
#include <string>

int main(int argc, char **argv)
{
	
	std::ofstream ofs( "file.txt" );
	std::string line = "This is the first line";
         // write is a method in class ofstream
	ofs.write( &*line.begin(), line.length() );
	ofs.close();
}

May 07 2017

JV <jrpv100997 yahoo.com> writes:

On Sunday, 7 May 2017 at 16:40:50 UTC, k-five wrote:
 On Sunday, 7 May 2017 at 15:59:25 UTC, JV wrote:
 [...]


         [...]

 --------------------------------------------------------------

 You have the right for confusing :) there is many read and 
 write names. But I assumed you are familiar with [Type] and 
 [Object] concept.

 in:
 auto output_file_stream = File( "file.txt", "w" );

 auto = File              == A type
 File( "file.txt", "w" ); == Constructor

 So this type has its own property, like read for "r" mode and 
 write for "w" mode.

 So you should use output_file_stream.write(), not readf or so 
 on.

 Still I am very new in D, but this is the same concept in other 
 language like C++

 in C++:
 #include <iostream>
 #include <fstream>
 #include <string>

 int main(int argc, char **argv)
 {
 	
 	std::ofstream ofs( "file.txt" );
 	std::string line = "This is the first line";
         // write is a method in class ofstream
 	ofs.write( &*line.begin(), line.length() );
 	ofs.close();
 }

Yeah i understand it very much like the other language like C/C++ 
and python..
since i'm self studying D language ..though i learn faster when 
there is a sample code
i don't know if it is rude but can i ask if you can give me a 
sample code for it?
a code for asking the user to enter something and then store it 
in a .txt file?

Thank you

May 08 2017

k-five <vhsu30 yahoo.com> writes:

On Monday, 8 May 2017 at 08:54:50 UTC, JV wrote:
 On Sunday, 7 May 2017 at 16:40:50 UTC, k-five wrote:
 On Sunday, 7 May 2017 at 15:59:25 UTC, JV wrote:


---------------------------------------------------

Do not worry. Your request is not rude. I give you a better tool. 
I finished to collect some examples in D and in a few days I will 
share it in my githup
https://github.com/k-five/
and you can use it. I tested all examples and even put the output 
of each, beside the example.

here is the list of them:

├── 01_overview
├── 02_environment
├── 03_basic_syntax
├── 04_variable
├── 05_data-type
├── 06_enums
├── 07_literals
├── 08_operators
├── 09_loops
├── 10_decision
├── 11_functons
├── 12_characters
├── 13_strings
├── 14_array
├── 15_associative_array
├── 16_pointers
├── 17_tuple
├── 18_struct
├── 19_union
├── 20_range
├── 21_alias
├── 22_mixin
├── 23_module
├── 24_template
├── 25_immutable_type
├── 26_file_io
├── 27_thread
├── 28_exception
├── 29_contract_programming
├── 30_conditional_compilation
├── 31_classes
├── 32_inheritance
├── 33_overloading
├── 34_encapsulation
├── 35_interface
└── 36_abstract

plus
some examples for D feature and how to install d-mode on emacs 
editor

I got familiar with D for two weeks, so I am a beginner too.
You will see these examples ( almost 190 ) until Friday on my 
githup.

May 08 2017

JV <jrpv100997 yahoo.com> writes:

On Monday, 8 May 2017 at 09:26:48 UTC, k-five wrote:
 On Monday, 8 May 2017 at 08:54:50 UTC, JV wrote:
 [...]


 ---------------------------------------------------

 Do not worry. Your request is not rude. I give you a better 
 tool. I finished to collect some examples in D and in a few 
 days I will share it in my githup
 https://github.com/k-five/
 and you can use it. I tested all examples and even put the 
 output of each, beside the example.

 [...]

Thank you and i hope to see more of you collection about D's 
filestream its very helpful

May 08 2017

k-five <vhsu30 yahoo.com> writes:

On Monday, 8 May 2017 at 10:22:53 UTC, JV wrote:
 On Monday, 8 May 2017 at 09:26:48 UTC, k-five wrote:
 On Monday, 8 May 2017 at 08:54:50 UTC, JV wrote:


---------------------------------------------------

If I continue to learn D I will do but there is no guarantee
and it got ready :)
https://github.com/k-five/D-By-Example

if you have git, download them:
git clone https://github.com/k-five/D-By-Example.git

May 08 2017

JV <jrpv100997 yahoo.com> writes:

On Monday, 8 May 2017 at 10:34:42 UTC, k-five wrote:
 On Monday, 8 May 2017 at 10:22:53 UTC, JV wrote:
 On Monday, 8 May 2017 at 09:26:48 UTC, k-five wrote:
 On Monday, 8 May 2017 at 08:54:50 UTC, JV wrote:


 ---------------------------------------------------

 If I continue to learn D I will do but there is no guarantee
 and it got ready :)
 https://github.com/k-five/D-By-Example

 if you have git, download them:
 git clone https://github.com/k-five/D-By-Example.git

Hey i'm not sure if i should create a new post for this but
how should i fix this it doesn't pause and store but just keeps 
reading

         string studNum;

         readf("%s",&studNum);
         write(studNum);

May 13 2017

k-five <vhsu30 yahoo.com> writes:

On Sunday, 14 May 2017 at 04:15:02 UTC, JV wrote:
 Hey i'm not sure if i should create a new post for this but
 how should i fix this it doesn't pause and store but just keeps 
 reading

         string studNum;

         readf("%s",&studNum);
         write(studNum);

Can you say exactly what you need?
It is better to be familiar with C and File in C, then using File 
in D
However, do not hesitate about asking, just feel free and ask

May 14 2017

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 05/13/2017 09:15 PM, JV wrote:
 it doesn't pause and store but just keeps reading

         string studNum;

         readf("%s",&studNum);
         write(studNum);

That's the normal behavior for reading into strings. If you want to read 
to the end of the line, try this:

import std.stdio;
import std.string;

void main() {
     write("What is your name? ");
     string name = readln.strip;

     writeln("Hello ", name, "!");
}

(It's the same as strip(readln()).)

Here is more information about readln() and strip() as well as 
formattedRead(), which can be more convenient:

   http://ddili.org/ders/d.en/strings.html

Ali

May 14 2017

Suliman <evermind live.ru> writes:

On Sunday, 7 May 2017 at 13:57:47 UTC, JV wrote:
 Hi guys

 I'd like to know how to get an input from the user to be stored 
 in a .txt file using import std.file and is it possible to 
 directly write in a .txt file without using a variable to store 
 the user input?

 Thanks for the answer in advance my mind is kinda jumbled about 
 this since im new to this language.

http://nomad.so/2015/09/working-with-files-in-the-d-programming-language/

May 07 2017

D Programming

C/C++ Programming

Other

digitalmars.D.learn - File Input