正确打印在2D矢量上

Question

我有一个函数打印出一个包含类项的2D矢量。这是向量：

 std::vector<vector<item>> notepad;

在我的课程项目中，每个项目都有私人成员：

 std::string name;
 double price;
 int quantity;

这些是相关的成员函数：

double item::getPrice()
{
    return price;
}

void item::setQuantity(int itemQuantity)
{
    quantity = itemQuantity;
}

int item::getQuantity()
{
    return quantity;
}

这是打印列表的功能：

void list::printLists(bool printTotalPrice)
{
    if (isEmpty() == true)
    {
        std::cout << "You have not added any lists yet." << std::endl;
    }
    else
    {
        std::vector<std::vector<item>>::iterator row;
        std::vector<item>::iterator col;

        for (row = notepad.begin(); row != notepad.end(); ++row)
        {
            double total = 0;
            std::cout << "------------------------------------------" << std::endl;

            for (col = row->begin(); col != row->end(); ++col)
            {
                if (col == row->begin()) //first item of user-created lists contain list name only
                {
                    std::cout << "List Name: " << col->getName() << std::endl;
                }
                else
                {
                    std::cout << "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" << std::endl;
                    std::cout << "Item: " << col->getName() << std::endl;
                    std::cout << "Price: " << col->getPrice() << std::endl;
                    std::cout << "Quantity: " << col->getQuantity() << std::endl;
                    std::cout << "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" << std::endl;
                }

                if (printTotalPrice == true)
                {
                    total += (col->getPrice()) * (col->getQuantity());
                }

            }

这是编译和运行时的结果：

------------------------------------------
List Name: Apples
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Eggs
Price: 0x609ca80.1
Quantity: 0x609ca8-12
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Bread
Price: 0x609ca81
Quantity: 0x609ca8-3
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Pizza
Price: 0x609ca810
Quantity: 0x609ca8-1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Peanut Butter
Price: 0x609ca83.25
Quantity: 0x609ca8-2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Bananas
Price: 0x609ca80.79
Quantity: 0x609ca8-6
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Salmon
Price: 0x609ca813.2
Quantity: 0x609ca8-1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Rib Eye
Price: 0x609ca820.2
Quantity: 0x609ca8-1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Spinach
Price: 0x609ca81.25
Quantity: 0x609ca8-3
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Item: 0x609ca8Tomatoes
Price: 0x609ca80.59
Quantity: 0x609ca8-5
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
------------------------------------------
------------------------------------------
List Name: MyList

知道如何修复格式化吗？