该程序旨在充当商店,输入相应商品的编号和数量。问题是,如果您想要三件或更多件商品,您会在购买时享受 10% 的折扣,并且任何小数点都应该被截断(保持在 int 数据类型的整数范围内)。程序将运行,但是 不计算折扣,尽管程序将运行,但始终表示为 0 。一探究竟!
int item, longsword, shortsword, warhammer, ring, potion, itemcost, quantity, discount, totalcost, finalcost;
System.out.print("Item Number: ");
item = keyboard.nextInt();
final int LONGSWORD = 120;
final int SHORTSWORD = 90;
final int WARHAMMER = 80;
final int RING = 150;
final int POTION = 10;
itemcost = 0;
if (item == 1)
{
itemcost = LONGSWORD;
}
if (item == 2)
{
itemcost = SHORTSWORD;
}
if (item == 3)
{
itemcost = WARHAMMER;
}
if (item == 4)
{
itemcost = RING;
}
if (item == 5)
{
itemcost = POTION;
}
System.out.print("Quantity of Item: ");
quantity = keyboard.nextInt();
totalcost = itemcost * quantity;
System.out.println("Total Cost: " + totalcost);
if (quantity >= 3)
{
discount = totalcost * (1/10);
}
else
{
discount = 0;
}
System.out.println("Discount: " + discount);
最佳答案
您遇到了非常常见的整数除法问题。
discount = totalcost * (1/10);
1/10
是 0,所以 discount
将是 0。改用这个:discount = (int) (totalcost * (0.1));
关于Java,商品商店折扣数学错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/30559616/