writind hexadecimal value into a file

[sweeet_addiction16]

i have to write these hexadecimal values into a file(say using fwrite)
in c..

4d 54 68 64 00 00 00 06 00 00 00 01 00 80 4d 54 72 6b 00 00 00 8c 00
ff 58
04 04 02 30 08 00 ff 59 02 00 00 00 90 3c 28 81 00 90 3c 00 00 90 3c
1e 81
00 90 3c 00 00 90 43 2d 81 00 90 43 00 00 90 43 32 81 00 90 43 00 00
90 45
2d 81 00 90 45 00 00 90 45 32 81 00 90 45 00 00 90 43 23 82 00 90 43
00 00
90 41 32 81 00 90 41 00 00 90 41 2d 81 00 90 41 00 00 90 40 32 40 90
40 00
40 90 40 28 40 90 40 00 40 90 3e 2d 40 90 3e 00 40 90 3e 32 40 90 3e
00 40
90 3c 1e 82 00 90 3c 00 00 ff 2f 00
all these values are to be written into a file
how do i do it?

 

[Kenneth Brody]

i have to write these hexadecimal values into a file(say using fwrite)
in c..

4d 54 68 64 00 00 00 06 00 00 00 01 00 80 4d 54 72 6b 00 00 00 8c 00
ff 58 [...]
90 3c 1e 82 00 90 3c 00 00 ff 2f 00
all these values are to be written into a file
how do i do it?

I suppose this isn't what you want?

printf("4d 54 68 64 00 00 00 06 ...");

Perhaps what you are trying to say is that you have this sequence
of 8-bit values, which you have been given as a list of hexadecimal
numbers, and you need to write those out to a file?

Store them in an unsigned char array (this assumes 8-bit chars,
which is probably the case), fopen() a file (make sure to specify
binary mode), fwrite() the data, and fclose() the file.

unsigned char hexvalues[] =
{
0x4d, 0x54, 0x68, 0x64, 0x00, 0x00, 0x00, 0x06, ...
};

--
+-------------------------+--------------------+-----------------------+
| Kenneth J. Brody | www.hvcomputer.com | #include |
| kenbrody/at\spamcop.net | www.fptech.com | <std_disclaimer.h> |
+-------------------------+--------------------+-----------------------+
Don't e-mail me at: <mailto:[email protected]>

 

[Marjancek]

i have to write these hexadecimal values into a file(say using fwrite)
in c..

4d 54 68 64 00 00 00 06 00 00 00 01 00 80 4d 54 72 6b 00 00 00 8c 00
ff 58
04 04 02 30 08 00 ff 59 02 00 00 00 90 3c 28 81 00 90 3c 00 00 90 3c
1e 81
00 90 3c 00 00 90 43 2d 81 00 90 43 00 00 90 43 32 81 00 90 43 00 00
90 45
2d 81 00 90 45 00 00 90 45 32 81 00 90 45 00 00 90 43 23 82 00 90 43
00 00
90 41 32 81 00 90 41 00 00 90 41 2d 81 00 90 41 00 00 90 40 32 40 90
40 00
40 90 40 28 40 90 40 00 40 90 3e 2d 40 90 3e 00 40 90 3e 32 40 90 3e
00 40
90 3c 1e 82 00 90 3c 00 00 ff 2f 00
all these values are to be written into a file
how do i do it?

Probably you meant something like

for(int i=0; i<array_length;i++)
{
fprintf(file_hande, "%2.2X ", array;
if(i%80 == 79) fputc(file_handle, '\n');
}

Mariano.

 

[Walter Roberson]

Probably you meant something like

for(int i=0; i<array_length;i++)
{
fprintf(file_hande, "%2.2X ", array;
if(i%80 == 79) fputc(file_handle, '\n');
}

You output a newline after every 80'th array element? Not
when you reach column 80? (careful, 80 is not divisible by 3.)

 

[psibur]

i have to write these hexadecimal values into a file(say using fwrite)
in c..

4d 54 68 64 00 00 00 06 00 00 00 01 00 80 4d 54 72 6b 00 00 00 8c 00
ff 58
04 04 02 30 08 00 ff 59 02 00 00 00 90 3c 28 81 00 90 3c 00 00 90 3c
1e 81
00 90 3c 00 00 90 43 2d 81 00 90 43 00 00 90 43 32 81 00 90 43 00 00
90 45
2d 81 00 90 45 00 00 90 45 32 81 00 90 45 00 00 90 43 23 82 00 90 43
00 00
90 41 32 81 00 90 41 00 00 90 41 2d 81 00 90 41 00 00 90 40 32 40 90
40 00
40 90 40 28 40 90 40 00 40 90 3e 2d 40 90 3e 00 40 90 3e 32 40 90 3e
00 40
90 3c 1e 82 00 90 3c 00 00 ff 2f 00
all these values are to be written into a file
how do i do it?

I thought asking for help with homework problems on comp.lang.c was a
no-no. A well.

Here's a hint: Since your instructor suggested using fwrite(), either
start with either: man 3 fwrite or www.google.com and search for
fwrite().

Then do your own stinking homework.