Question

Input a double and print the first three digits after the decimal point with a space between them. Sample run: Please input a decimal number: 67.3424 Answer: 3 4 2 Hint - to complete the second coding activity in lesson 5 you had to learn how to get individual digits from an int value. You can reuse this method once you convert the user input to an appropriate int value (you will need both multiplication and casting for this).
in java

Answer 1

To accomplish the task of extracting the first three digits after the decimal point from a double input and printing them with spaces between them, you can follow these steps in Java:

1. Prompt the user for input.
2. Read the input as a double.
3. Multiply the double by 1000 to shift the decimal point by three places.
4. Cast the result to an integer to get rid of any digits after the decimal point.
5. Use the modulus operator to extract the individual digits.
6. Print the digits with spaces between them.

Here is a sample implementation in Java:

```java
import java.util.Scanner;

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

// Step 1: Prompt the user for input
System.out.print("Please input a decimal number: ");
double inputDouble = scanner.nextDouble();

// Step 2: Multiply by 1000 to shift the decimal point
int shiftedValue = (int) (inputDouble * 1000);

// Step 3: Extract the individual digits
int firstDigit = (shiftedValue / 100) % 10;
int secondDigit = (shiftedValue / 10) % 10;
int thirdDigit = shiftedValue % 10;

// Step 4: Print the digits with spaces between them
System.out.println("Answer: " + firstDigit + " " + secondDigit + " " + thirdDigit);

// Close the scanner
scanner.close();
}
}
```

### Explanation of the Code:
1. **Scanner**: We use `Scanner` to take input from the user.
2. **Input**: The user is prompted to input a decimal number, which is read as a double.
3. **Shifting**: By multiplying the double by 1000, the first three digits after the decimal point are now the last three digits of the integer form.
4. **Digit Extraction**: We use integer division and the modulus operator to isolate each of the three digits.
5. **Output**: Finally, the digits are printed with a space in between.

### Sample Output:
If the user inputs `67.3424`, the output will be:
```
Please input a decimal number: 67.3424
Answer: 3 4 2
```