void addreservebook()
{
for (int i = 0; i < reserverecord.books.Count; i++)
{
if (reserverecord.books[i].book_id == isbn3.Text)
{
reserverecord.books[i].res_amount += Convert.ToInt32(amount.Text);
showrevbooks();
return;
}
}
book_sell book = new book_sell(isbn3.Text);
book.reserve(Convert.ToInt32(amount.Text));
reserverecord.books.Add(book);
showrevbooks();
}
void addbook(string isbn, int number)
{
int imark = 0;
bool bmark = true;
//查找是否已有该书，若有，则直接加上购买数
for (int i = 0; i < traderecord.books.Count; i++)
{
if (traderecord.books[i].book_id == isbn)
{
traderecord.books[i].sell_amount += number;
if (traderecord.books[i].sell_amount > traderecord.books[i].left_amount)
{
bmark = false; traderecord.books[i].sell_amount -= number;
}
imark = 1;
break;
}
}
//若没有，新建书籍记录并添加
if (imark == 0)
{
book_sell book = new book_sell(isbn);
book.sell(number);
if (book.left_amount < book.sell_amount)
{
bmark = false;
}
else
{
traderecord.books.Add(book);
}
}
if (bmark)
{
showbooks();
}
else
{
MessageBox.Show("库存不足！"); //购买量大于库存时，显示库存不足
}
}