Problem with textfile

[Nize]

Hi NG

This kode writes som text in a textfile:

*************** ***************
for (int j=0; j<length; j++)
{
ofstream session_fil("se ssion.txt");
session_fil<<va lues[j]<<endl;
}
*************** ***************

My problem is when i write 1,3,8 to the file only the 8 number will appear.

Think it is because i dont jump to next line in the textfile when i write to
it.

How do i do that?

Thanks
Nize

[Moonlit]

Re: Problem with textfile


"Nize" <nize@x.xx> wrote in message
news:3fd1d792$0 $95049$edfadb0f @dread11.news.t ele.dk...[color=blue]
> Hi NG
>
> This kode writes som text in a textfile:
>
> *************** ***************
> for (int j=0; j<length; j++)
> {
> ofstream session_fil("se ssion.txt");
> session_fil<<va lues[j]<<endl;
> }
> *************** ***************[/color]

You should create the stream outside the loop:

ofstream session_fil("se ssion.txt");

for (int j=0; j<length; j++)
{
session_fil<<va lues[j]<<endl;
}

Regards, Ron AF Greve
[color=blue]
>
> My problem is when i write 1,3,8 to the file only the 8 number will[/color]
appear.[color=blue]
>
> Think it is because i dont jump to next line in the textfile when i write[/color]
to[color=blue]
> it.
>
> How do i do that?
>
> Thanks
> Nize
>
>[/color]

[Nize]

Re: Problem with textfile

Thanks.

If i start the program now 1,3,8 will be placed i my textfile. If i then run
the program again i need to save the old data, so i will have the program to
jump to the nextline.

This i how i will have it to be:

//First run of the program
1
3
8
//Second run of the program
2
4
5

Can you help again

Thanks again
[color=blue]
> You should create the stream outside the loop:
>
> ofstream session_fil("se ssion.txt");
>
> for (int j=0; j<length; j++)
> {
> session_fil<<va lues[j]<<endl;
> }
>
> Regards, Ron AF Greve
>[/color]

[Jon Bell]

Re: Problem with textfile

In article <3fd1dc29$0$950 07$edfadb0f@dre ad11.news.tele. dk>,
Nize <nize@x.xx> wrote:[color=blue]
>
>If i start the program now 1,3,8 will be placed i my textfile. If i then run
>the program again i need to save the old data, so i will have the program to
>jump to the nextline.[color=green]
>>
>> ofstream session_fil("se ssion.txt");[/color][/color]

ofstream session_fil ("session.tx t", ios_base::app);

--
Jon Bell <jtbellap8@pres by.edu> Presbyterian College
Dept. of Physics and Computer Science Clinton, South Carolina USA

[Nize]

Re: Problem with textfile

> >If i start the program now 1,3,8 will be placed i my textfile. If i then
run[color=blue][color=green]
> >the program again i need to save the old data, so i will have the program[/color][/color]
to[color=blue][color=green]
> >jump to the nextline.[color=darkred]
> >>
> >> ofstream session_fil("se ssion.txt");[/color][/color]
>
> ofstream session_fil ("session.tx t", ios_base::app);[/color]

I then get the errors:

error C2653: 'ios_base' : is not a class or namespace name
error C2065: 'app' : undeclared identifier

Can you help more :o)

Thanks

*************** ***********
All my kode
*************** ***********
#include <iostream.h>
#include <afxwin.h>
#include <fstream.h>

class Protokol
{
private:
CString modtaget;
public:
Protokol(CStrin g modtag)
{
modtaget=modtag ;
}

void tilInt()
{
CString data=modtaget; //data = 138
int length=data.Get Length(); // length=3

int *values=new int[length];

for (int i=0; i<length; i++)
{
char chardata=data.G etAt(i); // '1'
int intdata= chardata-'0';//konvertering til int
values[i]=intdata;
cout<<values[i]<<endl;

ofstream session_fil ("session.tx t", ios_base::app);
session_fil<<va lues[i]<<endl;
}

ofstream session_fil("se ssion.txt");

for (int j=0; j<length; j++)
{
session_fil<<va lues[j]<<endl;
}
}
};

[Matthew Burgess]

Re: Problem with textfile

On Sat, 6 Dec 2003 15:56:22 +0100
"Nize" <nize@x.xx> wrote:
[color=blue]
> I then get the errors:
>
> error C2653: 'ios_base' : is not a class or namespace name
> error C2065: 'app' : undeclared identifier[/color]
[color=blue]
> #include <iostream.h>[/color]
#include <iostream>[color=blue]
> #include <fstream.h>[/color]
#include <fstream>

The nonstandard headers you were including before are not namespace
aware, use the standard versions instead.

Regards,

Matt.

[Nize]

Re: Problem with textfile

> > #include <iostream.h>[color=blue]
> #include <iostream>[color=green]
> > #include <fstream.h>[/color]
> #include <fstream>
>
> The nonstandard headers you were including before are not namespace
> aware, use the standard versions instead.
>
> Regards,
>
> Matt.[/color]

Ok, but then i get this error:

error C2872: 'cout' : ambiguous symbol

Thanks

[Matthew Burgess]

Re: Problem with textfile

On Sat, 6 Dec 2003 16:29:03 +0100
"Nize" <nize@x.xx> wrote:
[color=blue][color=green][color=darkred]
> > > #include <iostream.h>[/color]
> > #include <iostream>[color=darkred]
> > > #include <fstream.h>[/color]
> > #include <fstream>[/color]
>[color=green]
> > The nonstandard headers you were including before are not namespace
> > aware, use the standard versions instead.[/color]
>[color=green]
> > Regards,[/color]
>[color=green]
> > Matt.[/color]
>
> Ok, but then i get this error:
>
> error C2872: 'cout' : ambiguous symbol[/color]

What C++ book are you using? You need to prefix the standard library
provided libraries, functions and types with std:: (or use a "using
namespace std;" declaration).

Regards,

Matt.

[Jon Bell]

Re: Problem with textfile

In article <20031206153311 .00001fc2.matth ew@linuxfromscr atch.org>,
Matthew Burgess <matthew@linuxf romscratch.org> wrote:[color=blue]
>On Sat, 6 Dec 2003 16:29:03 +0100
>"Nize" <nize@x.xx> wrote:[color=green]
>>
>> Ok, but then i get this error:
>>
>> error C2872: 'cout' : ambiguous symbol[/color]
>
>What C++ book are you using? You need to prefix the standard library
>provided libraries, functions and types with std:: (or use a "using
>namespace std;" declaration).[/color]

And note that most C++ books that are more than about five years old are
obsolete, because of issues like this. The current C++ standard was
finalized in 1997-98.

--
Jon Bell <jtbellap8@pres by.edu> Presbyterian College
Dept. of Physics and Computer Science Clinton, South Carolina USA