你如何对java中的Scanner生成的值进行算术运算？

Question

我真的想知道如何使用扫描仪类添加，乘法或除法，因为每次运行代码时它总是给我0。

public static void main(String[] args) {
int NumPerHamper;
double ItemCost;
int NumHampersMade;
int NumItemsLeftOver;
int ValuePerHamper;
    int NumAvalable;
double ValueAllotedHampers;
double NumAllotedPerHamper;
double ValueAllHampers;
double ValueItemsLeftOver;
int ItemLeftOver;

    Scanner sc = new Scanner(System.in);

    System.out.println("Enter the number of items avalible");
    ValuePerHamper = sc.nextInt();
    System.out.println("Enter the number of avaliable mac and cheese");
    NumAvalable = sc.nextInt();
    NumHampersMade = NumAvalable/ValuePerHamper;

   // System.out.println("Items left over");
    //NumPerHamper = sc.nextInt();
   // System.out.println("");

    System.out.println(NumHampersMade);


}

}

Answer 1

将除数转换为更大的数据类型，例如int a 7，b = 9; double ave = a /（double）b。要么v

Answer 2

这是因为整数除法总是向下舍入，因为int不能有小数。尝试使用double。

double ValuePerHamper, NumAvalable, NumHampersMade;
Scanner sc = new Scanner(System.in);

System.out.println("Enter the number of items avalible");
ValuePerHamper = sc.nextDouble();
System.out.println("Enter the number of avaliable mac and cheese");
NumAvalable = sc.nextDouble();
NumHampersMade = NumAvalable/ValuePerHamper;

System.out.println(NumHampersMade);