On 2010-12-16, raffamaiden <raffamaiden@gmail.com> wrote:
> Hi all. I'm writing a program wich will write some variables to an
> output file. I do something like
>
> int a =5;
> fwrite(&a, sizeof(int), 1, my_file_ptr);
>
> This will write an int to the file pointed by my_file_ptr. But i know
> that the c standard does not specify the exact size in bytes for its
> primitive type, as far as i know it only specifies that and int is an
> integer type that rapresents a number with a sign, but different
> implementations\operating systems can have different size for an int.
>
> So this mean that my program will write a 32 bit integer with one
> implementation and a 16 bit with another implementation. This would
> also mean that the file generated by the program that is running in
> one implementation will not be readable in another implementation,
> unless the program knows also in which implementation the instance
> that generated the file was running.
> That is right? I do not want such a behavior. How can i solve this?

read and write the file one byte at a time.

or use textual representations

fprintf(my_file_ptr,"%d ",a);

fscanf(read_file,"%d",&a);



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