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How to read a table from a text file and store in structure.

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dharma30

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How to read a table from a text file and store in structure.

Dec 10th, 2008

Hello Everyone!,

This Forum has helped me very much in understanding different solutions in C-language . Before I post my query i would like to thank everyone for there help in the past.

Q:
I have a text file say "input.txt" which contains a table in the following form

NAME LVL OCCURS TYPE SCOPE LENGTH DEC BYTES
0YDFSE 01 CHA GLOBAL 172 172
1DERSW 05 5 NUM LOCAL 72 4 100

Now, my question is can i read the contents of the table into a structure and will i be able to print these contents in desired form in another file say "output.txt"

LVL NAME OCCURS DEC
01 0YDFSE
05 1DERSW 5 4

Also, Can we read the spaces under the 1st row of occurs and store in a structure variable say struct[0].occurs.

I am really confused how to approach this.

Your Help would make me the happiest man! Please suggest!.

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dharma30

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Re: How to read a table from a text file and store in structure.

Dec 10th, 2008

The table in input file is .

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
NAME       LVL    OCCURS   TYPE   SCOPE    LENGTH   DEC   BYTES
0YDFS        01    ###      CHA    GLOBAL    172    ###      172
1DERS       05     5        NUM    LOCAL      72     4       72
NAME       LVL    OCCURS   TYPE   SCOPE    LENGTH   DEC   BYTES
0YDFS        01    ###      CHA    GLOBAL    172    ###      172
1DERS       05     5        NUM    LOCAL      72     4       72

There was some whitespace problem in the before post.

###---> White spaces

Last edited by dharma30; Dec 10th, 2008 at 4:40 am.

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low_coder

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Re: How to read a table from a text file and store in structure.

Dec 10th, 2008

; yes you can separate data in the text or any other extension file ;with some characters (e.g: "<Name>Max</Name>" and so on) or ;you can separate data with e.g.: 0A4h or some other non-letter or ;number character.
; then your program must search for occurrence of those characters ;and fill the structure.

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dharma30

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Re: How to read a table from a text file and store in structure.

Dec 10th, 2008

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Originally Posted by low_coder

; yes you can separate data in the text or any other extension file ;with some characters (e.g: "<Name>Max</Name>" and so on) or ;you can separate data with e.g.: 0A4h or some other non-letter or ;number character.
; then your program must search for occurrence of those characters ;and fill the structure.

Sorry, I did not understand what you meant here. Can u give a small example?.Perhaps I framed the question wrong. I want to use C-language to code for this question. Is that possible?.

Any suggestions how to work on this with C-Language?

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Ancient Dragon Ancient Dragon is offline

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Re: How to read a table from a text file and store in structure.

Dec 10th, 2008

>>can i read the contents of the table into a structure
I don't know -- can you ?

>>will i be able to print these contents in desired form
Here again, I don't know if you can or not. Only you can tell us that. And why should we care if you can or not?

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Re: How to read a table from a text file and store in structure.

Dec 10th, 2008

•

Originally Posted by Ancient Dragon

>>can i read the contents of the table into a structure
I don't know -- can you ?

>>will i be able to print these contents in desired form
Here again, I don't know if you can or not. Only you can tell us that. And why should we care if you can or not?

HAHAHA, Dragon is angry today.

When you think you have done a lot, then be ready for YOUR downfall.

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Ancient Dragon Ancient Dragon is offline

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Re: How to read a table from a text file and store in structure.

Dec 10th, 2008

•

Originally Posted by Luckychap

HAHAHA, Dragon is angry today.

Nope, not angry, just answering his questions. He has to learn to ask the right question(s) if he wants better answers.

That like someone asks me "Do you know what time it is?". I look at my watch and answer "Yes", then continue with what I was doing.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Luckychap

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Re: How to read a table from a text file and store in structure.

Dec 10th, 2008

•

Originally Posted by Ancient Dragon

That like someone asks me "Do you know what time it is?". I look at my watch and answer "Yes", then continue with what I was doing.

Man you are just in mood

When you think you have done a lot, then be ready for YOUR downfall.

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Salem

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Re: How to read a table from a text file and store in structure.

Dec 11th, 2008

ASCII stupid question, get a stupid ANSI

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low_coder

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Re: How to read a table from a text file and store in structure.

#10

Dec 12th, 2008

; I have written an example for you.
; try this:
; all files are in attachement

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
#include <windows.h>
#include <winioctl.h>
 
struct Record
   {
      char Name[20];
      char LVL[20];
	  char OCCURS[20];
	  char TYPE[20];
	  char SCOPE[20];
	  char LENGTH[20];
	  char DEC[20];
	  char BYTES[20];
   };
 
int main(int argc, char *argv[])
{
	HANDLE hFile;
	DWORD file_size, hMemory, dwRead;
	LPTSTR pMemory;
	struct Record cur_data;
	int i, cur_record, cur_field, n;
	hFile = CreateFile("1.txt", GENERIC_READ + GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	file_size = GetFileSize(hFile, 0);
	hMemory = GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, file_size);
	pMemory = GlobalLock(hMemory);
	ReadFile(hFile, pMemory, file_size, &dwRead, NULL);
	cur_field = 0;
	cur_record = 0;
	n = 0;
	for (i = 0; i < file_size; i++)
	{
		if (pMemory[i] == 0x01)
		{
			switch (cur_field)
			{
				case 0:
				cur_data.Name[n] = 0x0;
				case 1:
				cur_data.LVL[n] = 0x0;
				case 2:
				cur_data.OCCURS[n] = 0x0;
				case 3:
				cur_data.TYPE[n] = 0x0;
				case 4:
				cur_data.SCOPE[n] = 0x0;
				case 5:
				cur_data.LENGTH[n] = 0x0;
				case 6:
				cur_data.DEC[n] = 0x0;
				case 7:
				cur_data.BYTES[n] = 0x0;
			}
			n = 0;
 
			if (cur_field == 7)
			{
				cur_field = 0;
				cur_record++;
				printf("Current Record: %d\n",cur_record);
				printf("Name: %s\n",cur_data.Name);
				printf("LVL: %s\n",cur_data.LVL);
				printf("OCCURS: %s\n",cur_data.OCCURS);
				printf("TYPE: %s\n",cur_data.TYPE);
				printf("SCOPE: %s\n",cur_data.SCOPE);
				printf("LENGTH: %s\n",cur_data.LENGTH);
				printf("DEC: %s\n",cur_data.DEC);
				printf("BYTES: %s\n\n",cur_data.BYTES);
			}
			else
			{
				cur_field++;
			}
		}
		else
		{
			switch (cur_field)
			{
				case 0:
				cur_data.Name[n] = pMemory[i];
				case 1:
				cur_data.LVL[n] = pMemory[i];
				case 2:
				cur_data.OCCURS[n] = pMemory[i];
				case 3:
				cur_data.TYPE[n] = pMemory[i];
				case 4:
				cur_data.SCOPE[n] = pMemory[i];
				case 5:
				cur_data.LENGTH[n] = pMemory[i];
				case 6:
				cur_data.DEC[n] = pMemory[i];
				case 7:
				cur_data.BYTES[n] = pMemory[i];
			}
			n++;
		}
	}
	GlobalUnlock(pMemory);
	GlobalFree(hMemory);
	CloseHandle(hFile);
	return 0;
}
#include <windows.h>
#include <winioctl.h>

struct Record
   {
      char Name[20];
      char LVL[20];
	  char OCCURS[20];
	  char TYPE[20];
	  char SCOPE[20];
	  char LENGTH[20];
	  char DEC[20];
	  char BYTES[20];
   };

int main(int argc, char *argv[])
{
	HANDLE hFile;
	DWORD file_size, hMemory, dwRead;
	LPTSTR pMemory;
	struct Record cur_data;
	int i, cur_record, cur_field, n;
	hFile = CreateFile("1.txt", GENERIC_READ + GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	file_size = GetFileSize(hFile, 0);
	hMemory = GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, file_size);
	pMemory = GlobalLock(hMemory);
	ReadFile(hFile, pMemory, file_size, &dwRead, NULL);
	cur_field = 0;
	cur_record = 0;
	n = 0;
	for (i = 0; i < file_size; i++)
	{
		if (pMemory[i] == 0x01)
		{
			switch (cur_field)
			{
				case 0:
				cur_data.Name[n] = 0x0;
				case 1:
				cur_data.LVL[n] = 0x0;
				case 2:
				cur_data.OCCURS[n] = 0x0;
				case 3:
				cur_data.TYPE[n] = 0x0;
				case 4:
				cur_data.SCOPE[n] = 0x0;
				case 5:
				cur_data.LENGTH[n] = 0x0;
				case 6:
				cur_data.DEC[n] = 0x0;
				case 7:
				cur_data.BYTES[n] = 0x0;
			}
			n = 0;

			if (cur_field == 7)
			{
				cur_field = 0;
				cur_record++;
				printf("Current Record: %d\n",cur_record);
				printf("Name: %s\n",cur_data.Name);
				printf("LVL: %s\n",cur_data.LVL);
				printf("OCCURS: %s\n",cur_data.OCCURS);
				printf("TYPE: %s\n",cur_data.TYPE);
				printf("SCOPE: %s\n",cur_data.SCOPE);
				printf("LENGTH: %s\n",cur_data.LENGTH);
				printf("DEC: %s\n",cur_data.DEC);
				printf("BYTES: %s\n\n",cur_data.BYTES);
			}
			else
			{
				cur_field++;
			}
		}
		else
		{
			switch (cur_field)
			{
				case 0:
				cur_data.Name[n] = pMemory[i];
				case 1:
				cur_data.LVL[n] = pMemory[i];
				case 2:
				cur_data.OCCURS[n] = pMemory[i];
				case 3:
				cur_data.TYPE[n] = pMemory[i];
				case 4:
				cur_data.SCOPE[n] = pMemory[i];
				case 5:
				cur_data.LENGTH[n] = pMemory[i];
				case 6:
				cur_data.DEC[n] = pMemory[i];
				case 7:
				cur_data.BYTES[n] = pMemory[i];
			}
			n++;
		}
	}
	GlobalUnlock(pMemory);
	GlobalFree(hMemory);
	CloseHandle(hFile);
	return 0;
}