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Oct 5th, 2006

fwrite(size_t_count)

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Hi,
can any one tell me what size_t_count does, i couldnt get it .
thanks guyz !

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fwrite(const void*_str,size_t_Size,size_t_count,file *_File);

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Oct 5th, 2006

Re: fwrite(size_t_count)

Click to Expand / Collapse Quote originally posted by rowly ...

Hi,
can any one tell me what size_t_count does, i couldnt get it .
thanks guyz !
(Toggle Plain Text)
fwrite(const void*_str,size_t_Size,size_t_count,file *_File);
fwrite(const void*_str,size_t_Size,size_t_count,file *_File);

It means how many of size_t_Size you want to write.
fwrite(buff, sizeof(int), 4, someFile) means you want to write four ints to file.

Last edited by andor; Oct 5th, 2006 at 9:40 am.

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Oct 5th, 2006

Re: fwrite(size_t_count)

aha beautifull ! now i got it !

1 more question !

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strcpy(rcust[i].item, strtok(NULL,","));

i used the strtok to read untill i reach a comma...
how can i replace the comma by a ";" ?
for example i want to do the same thing but now i want to write it to another file and replace the , by a semi colon ?!
have any idea how to do that with strtok or another function ?!

thx champ

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Re: fwrite(size_t_count)

use strchr() to find the comma then replace it

C Syntax (Toggle Plain Text)
char str[] = "Hello,World";
// find the comma
char *ptr = strchr(str,',')
// replace it if found
if(ptr != NULL)
   *ptr = ';';
char str[] = "Hello,World";
// find the comma
char *ptr = strchr(str,',')
// replace it if found
if(ptr != NULL)
   *ptr = ';';

Now, put the above in a loop to find and replace all the commas in the string.

Last edited by Ancient Dragon; Oct 5th, 2006 at 9:55 am.

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Oct 5th, 2006

Re: fwrite(size_t_count)

aha !
if i want to write to a file, do i have to fread it first or just
fwrite it straight away ?
thx champ

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Re: fwrite(size_t_count)

Quote ...

if i want to write to a file, do i have to fread it first or just
fwrite it straight away ?

It's tricky. Can you post some code that shows what you're trying to do?

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Re: fwrite(size_t_count)

Click to Expand / Collapse Quote originally posted by rowly ...

aha !
if i want to write to a file, do i have to fread it first or just
fwrite it straight away ?
thx champ

of course the program has to read it -- how else do you think it is going to be able to know where the commans are and what to write to the new file?

C Syntax (Toggle Plain Text)

for each line in the source file
   read a line
   replace all commas with semicolons
   write the string to the new file
end

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Re: fwrite(size_t_count)

Actually, you read from one file, then write to another file. You don't want to read and write to the same file. It gets too complicated.

Last edited by WaltP; Oct 5th, 2006 at 3:25 pm.

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Re: fwrite(size_t_count)

Click to Expand / Collapse Quote originally posted by WaltP ...

Actually, you read from one file, then write to another file. You don't want to read and write to the same file. It gets too complicated.

I did not suggest he write to the same file that he's reading. read the sudo-code again please -- "write to new file"

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Re: fwrite(size_t_count)

Click to Expand / Collapse Quote originally posted by Ancient Dragon ...

I did not suggest he write to the same file that he's reading. read the sudo-code again please -- "write to new file"

Actually Mr. WaltP did not direct his comment to you.
If you will read the OP recent post:

Quote ...

if i want to write to a file, do i have to fread it first or just
fwrite it straight away ?

Mr. WaltP's comment I think is directed to the OP.

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