小编use*_*214的帖子

在我的课堂上,我有两个方法负责获取和设置私有变量的值.在另一个类之外的方法中,我调用setter方法并将变量更改为另一个值.它暂时有效,但始终重置为原始值.

class storeItem
{
    public:
        void setPrice(int p)
        {
            price = p;
        }
        int getPrice()
        {
            return price;
        }
        storeItem(int p)
        {
            price = p;
        }
    private:
        int price;
}

void changePrice(storeItem item)
{
    int origPrice = item.getPrice();
    item.setPrice(rand() % 10 + 1);
    //The price is correctly changed and printed here.
    cout << "This item costs " << item.getPrice() << " dollars and the price was originally " << origPrice << " dollars." << endl;
}

int main()
{
    storeItem …