This is a discussion on HELP : writing DICOM metadata in C. - DICOM ; Hi, i'm trying to write DICOM metadata in C language. here is my code : #include "stdio.h" main( ) { FILE *fp; unsigned long preamble = 0x00000000; char prefix[4] = "DICM"; int index; fp = fopen("DICOMTEST.dcm","w"); /* open for writing ...
Hi, i'm trying to write DICOM metadata in C language. here is my
code :
#include "stdio.h"
main( )
{
FILE *fp;
unsigned long preamble = 0x00000000;
char prefix[4] = "DICM";
int index;
fp = fopen("DICOMTEST.dcm","w"); /* open for writing */
for (index = 1; index <= 128; index++)
fprintf(fp,"%d", preamble);
fprintf(fp,"%s", prefix);
fclose(fp); /* close the file before ending program */
}
But if we see the result in hex-editor, it looks like :
30 30 30 30 30 (128 times) ... 44 49 43 4d (DICM)
I need it to be looks like :
00 00 00 00 00 (128 times) ... 44 49 43 4d (DICM)
So, what's wrong with my code ?
Rgs,
Budhi
The problem is that when you use fprintf like this:
unsigned long preamble = 0x00000000;
....
fprintf(fp,"%d", preamble);
You are actually writing the character code for '0' out. You should
use the fwrite function in this situation. Here is some documentation:
http://www.cplusplus.com/reference/c...io/fwrite.html
On Jul 11, 3:43 am, josh.colema...@gmail.com wrote:
> The problem is that when you use fprintf like this:
>
> unsigned long preamble = 0x00000000;
> ....
> fprintf(fp,"%d", preamble);
>
> You are actually writing the character code for '0' out. You should
> use the fwrite function in this situation. Here is some documentation:http://www.cplusplus.com/reference/c...io/fwrite.html
Thank you Josh. Problem solved.
Rgs,
Budhi
