help on initializing array

[neversell]

here is my code:

/* ===== SharedDisk.h ===== */

#ifndef __SHAREDISK__
#define __SHAREDISK__


typedef struct
{
char Jump[ 3 ];
char Manufacturer[ 8 ];
char BytesPerSector[ 2 ];
char SectorsPerCluster;
char ReservedSectors[ 2 ];
char FATs;
char RootDirectoryEntries[ 2 ];
char LogicalSectors[ 2 ];
char MediaDescriptorByte;
char SectorsPerFAT[ 2 ];
char SectorsPerTrack[ 2 ];
char Surfaces[ 2 ];
char HiddenSectors[ 4 ];
} Disk;

#endif


initialize them somewhere in my program as following:
theDisk->Jump = "";
theDisk->Manufacturer = "";
:
:
and so on.

is this right?
if not, how to initialize them?

thx for the help

[Hammer]

In a word, no. You can't assign char arrays values in that manner, you must use strcpy(). But, as you are setting all the arrays to be empty (I presume you are), it'd probably be easier to just memset() the complete struct to 0.

>memset(theDisk, '\0', sizeof Disk);
should do the trick.

The strcpy() method is
>strcpy(theDisk->Manufacturer, "ACME");
Just make sure each element is big enough to hold the string plus one byte for the null terminator.

[Enmeduranki]

>In a word, no. You can't assign char arrays values in that manner, you must use strcpy(). <

Can't you do -

Disk theDisk = {0};

?

[Hammer]

Originally posted by Enmeduranki
>In a word, no. You can't assign char arrays values in that manner, you must use strcpy(). <

Can't you do -

Disk theDisk = {0};

?

Yes, you can Well, you could if theDisk was a structure, but if you look closely, you'll notice it's a pointer

>Disk myDisk = {0};
>Disk *theDisk = &myDisk;

[neversell]

thx for the help
that helps me a lot

[borko_b]

typedef struct 
{ 
   char Jump[ 3 ]; 
   char Manufacturer[ 8 ]; 
   char BytesPerSector[ 2 ]; 
   char SectorsPerCluster; 
   char ReservedSectors[ 2 ]; 
   char FATs; 
   char RootDirectoryEntries[ 2 ]; 
   char LogicalSectors[ 2 ]; 
   char MediaDescriptorByte; 
   char SectorsPerFAT[ 2 ]; 
   char SectorsPerTrack[ 2 ]; 
   char Surfaces[ 2 ]; 
   char HiddenSectors[ 4 ]; 
} Disk; 

....
Disk theDisk;
memset(&theDisk,0,sizeof(Disk));
....

[borko_b]

Or...

Disk *ptheDisk = &someDisk;

memset(ptheDisk,0,sizeof(Disk));