substring, date

Hi experts,
I have 2 columns: row_elem[1], and row_elem[10]
for example.
row_elem[1] ,                                 row_elem[10]
aaaaa NFLFAN sssss,                          01022004      date format mmddyyyy
aaaaa NFLFAN sssss,                          01152004
...                                                     ...
I check row_elem[1] first, if substring has NFLFAN, and if dd=15, then print 01162004 ( adding 1 to day, that is 16, always 16 )
otherwise print 01022004

My code is like this, but its not working. please help
...
main(int arc, char *arv[])
{
    ifstream fin("test.csv");
    ofstream fout("fout.txt");
    string row_read;
    while( getline(fin, row_read) )
    {

        vector<string> row_elem;
        GetFields(row_read, row_elem, ',');
....
string mm;
string dd;
string yyyy;

mm = row_elem[10].substr(0,2);
dd = row_elem[10].substr(2,2);
yyyy = row_elem[10].substr(4,4);
//cout << mm.c_str() << endl;

char pch[50];
char *ss1;
ss1 = strstr(row_elem[1],"NFLFAN");
if ( ss1 )
{
     cout << mm16yyyy <<endl;
}
else
     cout << mmddyyyy << endl;
}   // end of while
}