Originally Posted by eeeman

Do I store the usernames in an array lisst and pictures inb and array list and then somehow match them together to allow the user a succesful login>?

Originally Posted by thekashyap

Storage of the list of Username vs ID most probably has to be done persistantly. I would recommend not to use DB if this is the only reason you want to use it. Rather go for a simple flat/txt file would be easier.

Originally Posted by masijade

That requires that you load the entire list while running, or that you write your own search routines to search for the user/id combination.

Originally Posted by masijade

With a DB you simply set of a query with the username as the search string and return the "id".

Originally Posted by masijade

No fuss, no muss. No loading the entire list into main memory, and no self-rigged search routines. And storing new user/id combos is just as easy as finding one. A single statement, and you're done.

Originally Posted by masijade

And this includes the possibility of a new user attempting to use the same name as a current user, when the username is the primary key, as the insert will fail with a primary key validation. With that, you no longer even have to check yourself whether a new username exists or not. Simply try to add it.

Originally Posted by thekashyap

True but I feel that would be easier !


As someone quoted earlier you've deceptively missed a few other things:
1. Installation of DB?
2. Creation of DB table?
3. Code to create the DB connection?
4. Readup how to do step 1, 2 and 3 or ask someone???
I sure agree that once you're done with all this you'll "simply set of a query with the username as the search string and return the id".


Here is the fuss/muss we'll have to do if we use flat file (see the code at end). Self-regged search routines? std::map gives it. map::find().
Abt the "single stmt and you're done part" as I said earlier, it's not really true.


See the return type of std::map::insert(). It does this for you. Again you don't write no code.

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C++ Syntax (Toggle Plain Text)

#define MAX_LINE_LEN 100
 
int main()
{
    FILE * pFile = fopen ("user_info.txt", "w+");
    if( ! pFile )
    {
        cout << "Could not open file" << endl ;
        return 1 ;
    }
 
    for( int i = 0; i < 10; i++ )
    {
        char dummy[50] ;
        itoa(i, dummy, 10) ;
        fprintf (pFile, "%s %d\n", dummy, i);
    }
 
    rewind (pFile);
 
    map< string, int > usrInfMap ;
    char str [80];
    int j;
    while( EOF != fscanf (pFile, "%s %d", str, &j) )
    {
        usrInfMap[str] = j ;
    };
 
    fclose (pFile);
 
    map< string, int >::iterator it = usrInfMap.begin();
    for( ; it != usrInfMap.end(); it++ )
        cout << it->first.c_str() << " = " << it->second << endl ;
 
    return 0;
}

#define MAX_LINE_LEN 100 int main() { FILE * pFile = fopen ("user_info.txt", "w+"); if( ! pFile ) { cout << "Could not open file" << endl ; return 1 ; } for( int i = 0; i < 10; i++ ) { char dummy[50] ; itoa(i, dummy, 10) ; fprintf (pFile, "%s %d\n", dummy, i); } rewind (pFile); map< string, int > usrInfMap ; char str [80]; int j; while( EOF != fscanf (pFile, "%s %d", str, &j) ) { usrInfMap[str] = j ; }; fclose (pFile); map< string, int >::iterator it = usrInfMap.begin(); for( ; it != usrInfMap.end(); it++ ) cout << it->first.c_str() << " = " << it->second << endl ; return 0; }

Now finally remember that I said earlier:
I would recommend not to use DB if this is the only reason you want to use it (=>DB).