C++ strcuts and arrays

In the following code I am trying to resize the array at the correct place, my teacher said to ask for input for one item of the struct first then use a temp variable and I can't figure this out. thanks.

Code:

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if(infile.fail())//begin if-else
        cout<<"Sorry, the file could not be opened."<<endl;
    else
    { 
        while(!infile.eof())//this while loop resizes the vector and inputs the names from the file until the file ends
        {//begin while
            infile>>recordList[recordList.length()].sku;
            int temp = recordList[recordList.length()].sku;
            if(temp != infile.eof())//this if
            {//begin if
               
                infile.ignore(2,'\n');
                getline(infile,recordList[recordList.length()].artist);
                getline(infile,recordList[recordList.length()].album);
                infile>>recordList[recordList.length()].quantity;
                infile>>recordList[recordList.length()].price;
                recordList.resize(recordList.length() + 1);
            }//end if
        }//end while
    }//end if-else

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Code:

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int temp = recordList[recordList.length()].sku;

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First of all, where is everybody getting the length() method from on these containers? Is that standard? I've never seen it in any reference (including TC++PL). I'm pretty sure that size() is what you want. Second, that is fundamentally incorrect. Because indices start at 0, the recordList.size() element will always be out of bounds. Think about it. I think what your teacher wants you to do, rather than using the resize() method, is to use a temporary structure in tandem with push_back, like this:

Code:

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//First, create a temporary structure to hold input
//I don't know what type recordList holds, so I'll guess
Record input;

//You should consider not basing your loop on infile.eof(), it can be squirrely
//Read the FAQ on feof()
while(!infile.eof())//this while loop resizes the vector and inputs the names from the file until the file ends
        {//begin while 
            infile >>input.sku;
            if(input.sku != EOF) //This is probably still wrong, but it's closer.
            {//begin if <--- WHY THESE COMMENTS? IS INDENTATION NOT ENOUGH?
               
                infile.ignore(2,'\n'); //THIS LINE REALLY ISN'T SAFE
                getline(infile, input.artist);
                getline(infile, input.album);
                infile >>input.quantity >>input.price;
                recordList.push_back(input);
            }
        }
        //etc....

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Hope this helps.

to avoid using ignore you can read ALL the input using getline
and then - if needed - extract the data from the readed string using stringstream - there is a lot of samples on the board - how to do this