Thread: Int and Double...Performing Floating-Point Arithmetic help

Hello Everyone,

I am new Java Programming and I am struggling to pass my Java class. I have no idea on how to perform Java but I am trying lol. I am following assignments out of my work book and I have no idea as to what I am doing wrong. For this particular assignment I supposed to:

* Change all variables' data types to double.
* Change the two prompts to request double values
* Change change the two calls to the nextInt() method to nextDouble().



This is the original assignment:



import java.util.Scanner;

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

int firstNumber;
int secondNumber;
int sum;
int difference;
int average;

System.out.print("Please enter an integer>> ");
firstNumber = input.nextInt();
System.out.print ("Please enter another integer>> ");
secondNumber = input.nextInt ();

sum = firstNumber + secondNumber;
difference = firstNumber - secondNumber;
average = sum / 2;

System.out.println(firstNumber + " + " + secondNumber + "is" +sum);
System.out.println(firstNumber + " - " + secondNumber + "is" +difference);
System.out.println("The average of " + firstNumber + " and " +secondNumber + "is" +average);


}
}



This is the changes that I have made which are probably wrong:




import java.util.Scanner;

public class ArithmeticDemo2
{
public static void main(String[] args)
{
Scanner input= new Scanner(System.in);

int firstNumber;
int secondNumber;
int sum;
int difference;
int average;

System.out.print("Please enter an double>> ");
firstNumber = input.nextDouble();
System.out.print ("Please enter another double>> ");
secondNumber = input.nextDouble();

sum = firstNumber + secondNumber;
difference = firstNumber - secondNumber;
average = sum / 2;

System.out.println(firstNumber + " + " + secondNumber + "is" +sum);
System.out.println(firstNumber + " - " + secondNumber + "is" +difference);
System.out.println("The average of " + firstNumber + " and " +secondNumber + "is" +average);

}
}


This is the error that I am getting:



G:\ArithmeticDemo2.java:16: error: possible loss of precision
firstNumber = input.nextDouble();
^
required: int
found: double
G:\ArithmeticDemo2.java:18: error: possible loss of precision
secondNumber = input.nextDouble();
^
required: int
found: double
2 errors

Tool completed with exit code 1


Can someone please tell me what I did wrong or what I am missing? The work book that is assigned for my class is not helpful at all

Thanks so much!!

You need to change the data types of those to doubles. Right now they are declared as ints

Welcome to the forum! Please read this topic to learn how to post code in code or highlight tags and other useful info for new members.

Please post your code correctly using code or highlight tags per the above link.

Originally Posted by GregBrannon

Welcome to the forum! Please read this topic to learn how to post code in code or highlight tags and other useful info for new members.

Please post your code correctly using code or highlight tags per the above link.

Sorry..I tried to post my code in red but it wouldn't work. Not sure if it was because I copy and pasted the code.