How to modify a value in one of the field while fetching MySQL???

[Surgey Pushkin]

Hi, I have tried many things, did not work, what I need is to modify MediumINT Column while fetching MySQL. But it fails! Here is the code:

MYSQL *conn;
MYSQL_RES *res;
MYSQL_ROW row;

char *server = "hostlocal.com";
char *user = "myuser_name";
char *password = "password"; /* set me first */
char *database = "database1";
conn = mysql_init(NULL);

while ( !mysql_real_connect(conn, server,user, password, database, 0, NULL, 0) )
{ ::MessageBox(HWND_DESKTOP,"Cannot connect to MySql","Help",MB_OK);
::MessageBox(HWND_DESKTOP,"To Resolve, Fix Internet Connection or Credentials!","Help",MB_OK);
}

int ip = mysql_query(conn,"SELECT * FROM Student_Database");

res = mysql_use_result(conn);

long row_num = 0;

if (ip==0)
while ((row = mysql_fetch_row(res)) != NULL)
{

char * row_s;
_itoa(row_num,row_s,strlen(row_s)+1);

row[5] = row_s; // Here I want to modify the value.

/* HERE I have a column name "Count",which is INTMEDIUM, which I would want to modify, as I fetch the numbers of the rows from 0,1,2,3... and so on...*/
/* I would want to place 0,1,2,and so on... BUT ii fails!, I have 6 fields, row[0],row[1],row[2],row[3],row[4],row[5] want to modify the last one. */

row_num++;
}

mysql_free_result(res);
mysql_close(conn);


Any body know how this can be done???