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int fseek( FILE *stream, long offset, int origin );
/* fseek example */
#include <stdio.h>
int main ()
{
FILE * pFile;
pFile = fopen ( "example.txt" , "w" );
fputs ( "This is an apple." , pFile );
fseek ( pFile , 9 , SEEK_SET );
fputs ( " sam" , pFile );
fclose ( pFile );
return 0;
}