in a funtion, there is thisCode:typedef struct { char Jump[ 3 ]; char Manufacturer[ 8 ]; char BytesPerSector[ 2 ]; } Disk;
Disk *theDisk
char array[40]={'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', .....};
the problem is how do i copy the 3rd element to 8th element of array to the the member ( thDisk->Manufacturer ) of structure Disk?
and then display it on the screen.
thx for the help
Code:#include <stdio.h> #include <string.h> typedef struct { char Jump[ 3 ]; char Manufacturer[ 8 ]; char BytesPerSector[ 2 ]; } Disk; // if you use a pointer it must point to something before its used. Disk* theDisk; char array[40]={'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', ...}; // make theDisk point to a valid instance of Disk memcpy(theDisk->Manufacturer, &array[3], 5);
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thx man
that is helped a lot.
Don't forget, if you're going to use manufacturer as a string, it'll need to be null terminated. I'm guessing the struct is initialised to 0, as per your other thread (if I remember right)? ... which means it'll work OK.
Also, this is close:
>memcpy(theDisk->Manufacturer, &array[3], 5);
but the request was to start at the third element, whereas this starts at the 4th (the index count starts at 0, not 1).
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