Java 从double和输入tsking中使用printf给出两个小数

该代码旨在计算ansa表达式，并生成一个小数点后两位的答案，其中viriable声明为double。 谢谢你的帮助

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nextInt函数读取整数。您需要使用nextDouble函数来读取double

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此外，您需要在输入双精度后进行计算。

printf（'答案是%0.2f'，ans）

。您的代码不正确。因为他给出的输入示例为1.75

Expected Input:
x=1.75
y=1.25
z=0.75
The answer is 0.95

This program output:
Enter the value of x:
1.75
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:864)
at java.util.Scanner.next(Scanner.java:1485)
at java.util.Scanner.nextInt(Scanner.java:2117)
at java.util.Scanner.nextInt(Scanner.java:2076)
at evaluate.main(evaluate.java:13)




import java.util.Scanner;   //make scanner class available
public class evaluate
{
public static void main(String[] args)
{
Scanner input=new Scanner(System.in);
double x=0.0;
double y=0.0;
double z=0.0;
double ans;
ans=(x*y-y*z)/x*z ;
System.out.println("Enter the value of x:"); //take input 
x=input.nextInt();
System.out.println("Enter the value of y:");  

y=input.nextInt();
System.out.println("Enter the value of z:");  //take value of z
z=input.nextInt();
System.out.printf("The answer is ","%0.2f%ans",ans); //get to two decimals

}
}