C / C++ / MFC

1-Feb-06 3:39

Does anybody know how to read a tab delimited file at the same time using the '\n' as a delimiter if its encountered first.
I tried using getline(buffer, num_chars, '\t')
It works fine when i know the number of columns.

Say i had a file like

line1:Col1 Col2 Col3
line2:Col1 Col2
line3:Col1 Col2 Col3

using getline(buffer, num_chars, '\t') would return
Col1 Col2 Col3 Col1 Col2 Col1 Col2 Col3
everything in one line.

I tried defining a macro like #define tab_eol '\t'|'\n' then use it as
getline(buffer,num_chars,tab_eol) but it does not really work

Any help Please

Kelvin Chikomo

toxcct1-Feb-06 4:03

toxcct

1-Feb-06 4:03

kelprinc wrote:
#define tab_eol '\t'|'\n'

perfectly useless buddy...

consider this to understand why :

'\t' | '\n' = 0x09 | 0x10
            = 00001001 | 00010000
            = 00011001
            = 0x19
            = '\031'
            = DC3 character...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

kelprinc1-Feb-06 19:00

1-Feb-06 19:00

DO you have any suggestions

David Crow1-Feb-06 5:17

1-Feb-06 5:17

Does strtok() help?

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

kelprinc1-Feb-06 21:17

1-Feb-06 21:17

Thanks but strtok() does not work well if you have empty columns. i.e concurrent tabs

David Crow2-Feb-06 2:45

2-Feb-06 2:45

True. You could always make your own version of strtok() that does not skip leading delimeters.

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

kelprinc2-Feb-06 3:04

2-Feb-06 3:04

I managed to sort out the problem by reading the whole line into a istringstream object then tokenize the object using the getline method and '\t' as the delimiter.

But for interest sake how wld you do it?

Kelvin Chikomo

David Crow2-Feb-06 4:55

2-Feb-06 4:55

kelprinc wrote:
But for interest sake how wld you do it?

I guess that would depend on several factors. Am I limited to just C++ code? Is it a console or GUI application? What is my state of mind at that moment?

Glad you got it going.

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Stephen Hewitt1-Feb-06 12:43

Stephen Hewitt

1-Feb-06 12:43

Are the entries (e.g. "Col1") allowed spaces in them? If not this will do won't it?

#include <iostream>
#include <string>
using namespace std;

// Somewhere...
string entry;
while ( cin >> entry )
{
     cout << entry << endl;
}

Steve

kelprinc1-Feb-06 18:59

1-Feb-06 18:59

Yah they have spaces between them

Stephen Hewitt1-Feb-06 19:03

Stephen Hewitt

1-Feb-06 19:03

If thay have spaces between them then the code I have should work. If they have spaces in them it will not.

Steve

kelprinc1-Feb-06 21:14

Windows User Name and HostName

1-Feb-06 21:14

I got it

I read each line into an an istringstream object and i use getline(buffer,num_chars,'\t')
to seperate the the string.

COOL

Kelvin Chikomo

RadioOpa1-Feb-06 3:10

RadioOpa

1-Feb-06 3:10

How to read Windows User Name and the machine Host name in a VC application ?

Chris Meech1-Feb-06 3:55

Chris Meech

1-Feb-06 3:55

The function NetWkstaUserGetInfo can be called to get the User Name.
The function NetWkstaGetInfo can be called to get the computer name.
There are security restrictions in place that could cause these calls to fail, though.

Chris Meech

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David Crow1-Feb-06 5:19

1-Feb-06 5:19

RadioOpa wrote:

How to read...Host name in a VC application ?

Try gethostname().

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

ThatsAlok1-Feb-06 18:06

ThatsAlok

1-Feb-06 18:06

RadioOpa wrote:
Windows User Name

GetUserName

RadioOpa wrote:
machine Host name

GetComputerName

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