java - 得到错误的餐费

Question

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给定餐费(一顿饭的基本成本)、小费百分比(作为小费添加的餐费百分比)和餐费百分比(作为税添加的餐费百分比)，找到并打印这顿饭的总费用。

这是我的代码

public class Solution3 {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        double mealCost = scan.nextDouble(); // original meal price
        int tipPercent = scan.nextInt(); // tip percentage
        int taxPercent = scan.nextInt(); // tax percentage
        double tip = mealCost *(tipPercent/100);
        double tax = mealCost*(taxPercent/100);
        double total= mealCost+tip+tax;
        // cast the result of the rounding operation to an int and save it as totalCost 
        int totalCost = (int) Math.round(total);

         System.out.println("The total meal cost is "+totalCost+" dollars");
    }
}

预期输出

The total meal cost is 15 dollars.

我的输出

The total meal cost is 12 dollars.

请帮帮我。

如有任何帮助，我们将不胜感激。

Answer 1

这是一个整数除法问题。

试试这个:

double tip = mealCost *(tipPercent/100.0);
double tax = mealCost*(taxPercent/100.0);