typedef struct position
{
    char name[LENGTH];
    char start[DATE_LEN];
    char end[DATE_LEN];
}POSITION;


char* buildval(POSITION* p)
{
    char* tmp = p->start;
    char *ans=NULL;
    while (*tmp != NULL && tmp != '#')
    {
        *ans = *tmp;
        tmp++;
        ans++;

    }
    return ans;
}

void main()
{
    POSITION newp = {"engineer", "11#2003" , "12#2006"};
    char* s = buildval(&newp);
    puts(s);
}