Copy data from CPU Buffer to PC hard disk

[zaid]

Hi

I saved data ( with specific size and address) in main memory of PC (i.e CPU memory)... How can I copy it in the PC hard dick such as D drive using C programming?

Thanks
Hussam

[Sebastiani]

Open the file with fopen. Write the data to file using fwrite. Close the file with fclose. Be sure to check your return values. Make sense?

[Epy]

"hard dick" hahahaah

Anyway, that sounds pretty easy

FILE f = fopen("mydata.bin","wb");
char *ptr;
ptr = 0x12345678; // some address in memory
fwrite(ptr, sizeofthatdatahere, 1, f);
fclose(f);
ptr = NULL;

[Sebastiani]

"hard dick" hahahaah

Anyway, that sounds pretty easy

FILE f = fopen("mydata.bin","wb");
char *ptr;
ptr = 0x12345678; // some address in memory
fwrite(ptr, sizeofthatdatahere, 1, f);
fclose(f);
ptr = NULL;

1) The result of fopen should be checked.
2) A conversion from integer to pointer should be explicitly casted.
3) The result of fwrite should be checked.
4) Calling fclose on a NULL pointer will likely crash.

[Epy]

Yes, this was just a quick example, I was just outlining the process. I would regularly check to see if fopen returns NULL or if the fwrite failed. Points 1 and 4 are basically the same.