C file name format help

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Hi,

I am using plain C.
I am getting responses from database that how many documents are available in DB.

I need to create a file which conains the information about that document.
Filename has specific format. The format is x000001.PDF
where,
x: document type
000001: is incnumber
PDF: extension
So for each response I need to change the 000001,000002,000003, etc....

Please help me out how can I do this.
rignt now I had used hard coded value.

char Incnumber[7] = "000001";
sprintf(filename,"%s%s.%s",type,Incnumber,"PDF");

FILE *fptr = fopen(filename,"w+");

.....

Thanks in advance.

Posted 23-Apr-10 0:49am

Poonamol

Updated 23-Apr-10 1:05am

Saurabh.Garg

v2

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5 solutions

Solution 3

Thanks for reply.

My IncNumber size is 6 chars 000000.
If i receive 1 digit/2digit/3digit...etc (12/100) responses, then its not working for me.
Depending on response numbers, how can I do the file name change?

Help me out please.

Posted 23-Apr-10 1:35am

Poonamol

Solution 5

Thanks for the reply.

Working fine now :-O

Posted 23-Apr-10 22:51pm

Poonamol

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Saurabh.Garg · Accepted Answer · 2010-04-23T01:01:00

You are already using sprintf, so try this:

sprintf(filename,"%s%07d.%s", type, i, "PDF");

%07d : d means print integer, 7 specifies the width of the number, and 0 means that pad the empty places with 0.

Check these links for more information:
http://msdn.microsoft.com/en-us/library/56e442dc(v=VS.90).aspx[^]
http://msdn.microsoft.com/en-us/library/25366k66(v=VS.90).aspx[^]

-Saurabh

Adam Roderick J · Accepted Answer · 2010-04-23T01:10:00

Solution 2

I think you are getting the number.
Why dont you try the below format?

int nCount  = 1;
sprintf(filename,"00000%d%s.%s",type,nCount,"PDF");

Posted 23-Apr-10 1:10am

Adam Roderick J

Saurabh.Garg · Accepted Answer · 2010-04-23T01:48:00

The solution I gave you works for all 7 digit number.

char filename[10];
sprintf(filename,"%07d", 1); // filename="0000001".
sprintf(filename,"%07d", 10); // filename="0000010".
sprintf(filename,"%07d", 100); // filename="0000100".
sprintf(filename,"%07d", 1000); // filename="0001000".
sprintf(filename,"%07d", 10000); // filename="0010000".
sprintf(filename,"%07d", 100000); // filename="0100000".
sprintf(filename,"%07d", 100000); // filename="1000000".

-Saurabh

C file name format help

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