#include<CSql.h>int main(){    Connection conn;    DbRetVal rv = conn.open("wrongusername", "manager");    if (rv == OK)    {       return 1;    }    printf("wrong username test passed Return value %d \n", rv);    rv = conn.open("praba", "wrongpasswd");    if (rv == OK)    {       return 2;    }    printf("wrong password test passed Return value %d \n", rv);    return 0;}