根据用户输入打印回计算

Question

所以我试图获得类似于此的输出：

Enter the first number: 3.25

Enter the second number: 10.3

  3.25 *  10.30 =  33.48

  3.25 /  10.30 =   0.32

  3.25 %  10.30 =   3.25

 10.30 *   3.25 =  33.48

 10.30 /   3.25 =   3.17

 10.30 %   3.25 =   0.55

在此示例中，用户输入数字 3.25 和 10.3，然后代码获取这些数字并对它们应用多项计算。

这是我目前所知道的：

import java.util.Scanner;

public class test {

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

double fnumber, snumber, mult, div, modulo, mult2, div2, modulo2;
System.out.println("Enter the first number:");
fnumber = scan.nextDouble();

System.out.println("Enter the second number:");
snumber = scan.nextDouble();

/* various calculations  */
mult = fnumber * snumber;
div = fnumber / snumber;
modulo = fnumber % snumber;
mult2 = snumber * fnumber;
div2 = snumber / fnumber;
modulo2 = snumber % fnumber;

/* print back to user  */
System.out.printf("%f * %f = %.2f\n", mult);

直到最后一行我都很好。从上面的示例中，我试图让它说 3.25 * 10.30 = 33.48。

我如何使用 %f 根据用户输入调用多个双打？

谢谢。

Answer 1

你快搞定了。试试这个：

System.out.printf("%f * %f = %f\n", fnumber, snumber, mult);

Answer 2

尝试：

System.out.printf("%f * %f = %.2f\n", fnumber, snumber, mult);

根据用户输入打印回计算

Printing back calculations based on user input

java

math

user-input