Thread: Access violation...

I'm getting an access violation from this code:

Code:

cout<<card[x].name
    <<setw(30-namelen)<<setprecision(0)<<'%'
    <<card[x].interestRate
    <<setw(10)<<setprecision(2)<<'$'
    <<card[x].balance<<std::flush
    <<setw(10-balancelength(card[x].balance))<<'$'
    <<adjbal(card[x].balance,card[x].interestRate)<<endl;

The program stops output right before the second '$', and in debugging sends me to streambuf, line 130:

Code:

char_type                    _M_pback[_S_pback_size];

theres some comments a few lines above:

Code:

// Necessary bits for putback buffer management. Only used in
// the basic _filebuf class, as necessary for the standard
// requirements.  The only basic _streambuf member function that
// needs access to these data members is in_avail...
// NB: pbacks of over one character are not currenly supported

I tried flushing the stream, but that didn't help... without debugging, the program runs to that point and gets killed by windows... I dont' really even know what this is trying to tell me, so I brought my question here...

sorry about that... that's there... just missed it while retyping the code into the post... heh

I've narrowed it down a little more... it's something wrong with the setw() part... here's the function call that went into that:

Code:

int financeClass::balancelength(float balance)
{
     int i=3;  //two decimal places and decimal
     while(balance>0)
     {
          i++;
          balance/=10;
     }
     return i;
}

Code:

>     while(balance>0)
>     {
>          i++;
>          balance/=10;
>     }

Looks like an endless loop, considering balance is a float.

fixed it before I saw your post, but thanks anyway:

Code:

int financeClass::balancelength(float balance)
{
     int i=3;  //two decimal places and decimal
     while(balance>0)
     {
          i++;
          balance=static_cast<int>(balance/10.0);
     }
     return i;
}

Looks like a good solution, glad you got it working.