Doubt in file handling

[Harry]

Dear all,

I am having an integer array of size 176x144.I need to copy the first
256 bytes from this array to a file,then the next 256 and so
on...which function i can use.I am using Visual C++ compiler(C
language i am using).I tried out fwrite.But the values in the text
file where in ASCII.I want themto be in decimal or hexadecimal.....how
can i do it?

thanks in advance

 

[Chris Dollin]

I am having an integer array of size 176x144.I need to copy the first
256 bytes from this array to a file,then the next 256 and so
on...

If you have an /integer/ array (do you mean an /int/ array?), why are
you worried about /bytes/?

And if your array is 176x144, why /256/ bytes?

which function i can use.I am using Visual C++ compiler(C
language i am using).I tried out fwrite.But the values in the text
file where in ASCII.I want themto be in decimal or hexadecimal.....how
can i do it?

If you use `fwrite`, you will write out the raw bytes of the array,
and if you look at them with a text editor (or type them to the screen),
what you will see will be character garbage. If what you /want/ is the
decimal representation of the integer values, I'd suggest using `fprintf`,
with a format string like " %d" ("a space then the decimal representation
of the next int argument").

And if you have a problem doing that, post here /showing your exact code/
(after making it small and simple and to the point), because if we can't
see it, we can't debug it [1].

[1] Usually.

 

[Harry]

I am having an integer array of size 176x144.I need to copy the first
256 bytes from this array to a file,then the next 256 and so
on...

If you have an /integer/ array (do you mean an /int/ array?), why are
you worried about /bytes/?

And if your array is 176x144, why /256/ bytes?

which function i can use.I am using Visual C++ compiler(C
language i am using).I tried out fwrite.But the values in the text
file where in ASCII.I want themto be in decimal or hexadecimal.....how
can i do it?

If you use `fwrite`, you will write out the raw bytes of the array,
and if you look at them with a text editor (or type them to the screen),
what you will see will be character garbage. If what you /want/ is the
decimal representation of the integer values, I'd suggest using `fprintf`,
with a format string like " %d" ("a space then the decimal representation
of the next int argument").

And if you have a problem doing that, post here /showing your exact code/
(after making it small and simple and to the point), because if we can't
see it, we can't debug it [1].

[1] Usually.

ya i got the problem solved as u said....i used fprintf.thanks a lot