Java promotes the exact value of N from n to n

I have this simple question

Sample input:

Enter a 95.123

Enter two 12

Raising the first input to the second input must give an accurate power value Like this: 548815620517731830194541.8990253434157159735359672218698

I can't make it.

This is what I have done so far I think I missed something

System.out.println("Input One");
Scanner scanner = new Scanner(system.in);
Double inputOne = scanner.nextDouble();
System.out.println("Input Two");
Double inputTwo = scanner.nextDouble();
Double result = Math.pow(inputOne,inputTwo);
BigDecimal big = new BigDecimal(result);
System.out.println(big);

What did I miss?

Solution

You use double to start, and double doesn't fully represent 95.123 Then, you will use math. With a double value Pow, which will further reduce the accuracy It makes no sense to convert an already corrupted value to a high-precision value... It can't magically recover the data

Just pass the string to the BigDecimal constructor of the first parameter, and then POW is passed to the calculation

Example code:

import java.math.BigDecimal;

public class Test {

    public static void main(String[] args) {
        BigDecimal inputOne = new BigDecimal("95.123");
        int power = 12;
        BigDecimal result = inputOne.pow(power);
        System.out.println(result);
    }
}

Output:

548815620517731830194541.899025343415715973535967221869852721

(it seems that your expected value is actually truncated... The exact value should end with 1, because 312 ends with 1.)