#include<stdio.h>
#include<stdlib.h>
#include<string.h>
EXEC SQL BEGIN DECLARE SECTION;
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...................
char userid='/';
EXEC SQL END DECLARE SECTION;
int main()
{
fpos_t file_pos;
fpos_t file_current_pos=0;/*initialy its for pointing begging of file*/
...............
................
EXEC SQL CONNECT :userid;
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....................
}