java - 如何修复计算错误？

Question

我正在尝试编写一个程序，从用户那里读取 2 个数字并将它们相除。这是我到目前为止的代码:

import java.util.Scanner;

public class divideByZero {

public static int quotient(int numerator, int denominator)
{
   return numerator / denominator;
}

public static void main(String args[])
{
   Scanner scanner = new Scanner(System.in);

    System.out.print("Please enter the first number: ");

    int numerator = scanner.nextInt();

    System.out.print("Please enter the second number: ");

    int denominator = scanner.nextInt();

    int result = quotient( numerator, denominator );

    float result2 = (float)result;

    System.out.printf("\n The first number %d divided by the second number "
            + "%d = %f\n", numerator, denominator, result2 );

}

我在计算方面遇到了问题。例如，当我输入 3 除以 4 时，我得到结果 0.000000。如何获得精确到小数点后 2 位的结果？

Answer 1

在除以分子和分母之前将它们转换为 float 。

import java.util.Scanner;

public class divideByZero {

public static float quotient(float numerator, float denominator)
{
   return numerator / denominator;
}

public static void main(String args[])
{
   Scanner scanner = new Scanner(System.in);

    System.out.print("Please enter the first number: ");

    int numerator = scanner.nextInt();

    System.out.print("Please enter the second number: ");

    int denominator = scanner.nextInt();

    float result = quotient( (float) numerator, (float) denominator );

    System.out.printf("\n The first number %d divided by the second number "
            + "%d = %f\n", numerator, denominator, result );

}