Methods Need help

[kennith stomps]

Here is my updated code with my array according to that, I still don't understand how I am to output the numArray in the  getOperand method to my main method operandsArray

import java.util.Scanner;

public  class aCalculateP {

	public static void main(String[] args) {
		//menu choice variable

	int choice = getMenuOption();
	
	if (choice != 7){
	
		double[] operandsArray;
		operandsArray = new double[1];
		operands = getOperand();
	
	}	
	
	}


//getmenu input method
	public static int getMenuOption() {
		System.out.println("\tArray Calculations calculator \n");
		System.out.println("1. Add\n");
		System.out.println("2. Subtract\n");
		System.out.println("3. Multiple\n");
		System.out.println("4. Divide\n");
		System.out.println("5. Dot Product\n");
		System.out.println("6. Generate Random Number\n");
		System.out.println("7. Quit\n");
		System.out.println("Make your selection\n");
		//activate scanner
		Scanner input = new Scanner(System.in);
		int int1 = input.nextInt();
		
		return int1;
	}
	
	public static double[] getOperand(double[] value) {
		System.out.println(" select your 2 numbers \n" );
		
		Scanner input = new Scanner(System.in);
		
		double[] numArray;
		numArray = new double[1];
		double numArray[0] = input.nextDouble();
		double numArray[1] = input.nextDouble();
		}
		
	
		return numArray;
	}
	

[Carey Brown]

I merged your stuff with the following thread. I hope that is okay by you.

[kennith stomps]

I do not understand how I am to output the value of one array in a method to another array in the main method, here is my code thus far.

import java.util.Scanner;

public  class aCalculateP {

	public static void main(String[] args) {
		//menu choice variable

	int choice = getMenuOption();
	
	if (choice != 7){
	
		double[] operandsArray;
		operandsArray = new double[1];
		operands = getOperand();
	
	}	
	
	}


//getmenu input method
	public static int getMenuOption() {
		System.out.println("\tArray Calculations calculator \n");
		System.out.println("1. Add\n");
		System.out.println("2. Subtract\n");
		System.out.println("3. Multiple\n");
		System.out.println("4. Divide\n");
		System.out.println("5. Dot Product\n");
		System.out.println("6. Generate Random Number\n");
		System.out.println("7. Quit\n");
		System.out.println("Make your selection\n");
		//activate scanner
		Scanner input = new Scanner(System.in);
		int int1 = input.nextInt();
		
		return int1;
	}
	
	public static double[] getOperand(double[] value) {
		System.out.println(" select your 2 numbers \n" );
		
		Scanner input = new Scanner(System.in);
		
		double[] numArray;
		numArray = new double[1];
		double numArray[0] = input.nextDouble();
		double numArray[1] = input.nextDouble();
		}
		
	
		return numArray;
	}
	

		

		
		

[kennith stomps]

This is literally insane how hard it is to get such a simple answer

import java.util.Scanner;

public  class aCalculateP {

	public static void main(String[] args) {
		//menu choice variable

	int choice = getMenuOption();
	
	if (choice != 7){
	
		double[] operandsArray;
		operandsArray = new double[1];
		operandsArray = getOperand();
	
	}	
	
	}


//getmenu input method
	public static int getMenuOption() {
		System.out.println("\tArray Calculations calculator \n");
		System.out.println("1. Add\n");
		System.out.println("2. Subtract\n");
		System.out.println("3. Multiple\n");
		System.out.println("4. Divide\n");
		System.out.println("5. Dot Product\n");
		System.out.println("6. Generate Random Number\n");
		System.out.println("7. Quit\n");
		System.out.println("Make your selection\n");
		//activate scanner
		Scanner input = new Scanner(System.in);
		int int1 = input.nextInt();
		
		return int1;
	}
	
	public static double[] getOperand(double[] value) {
		System.out.println(" select your 2 numbers \n" );
		
		Scanner input = new Scanner(System.in);
		
		double[] numArray;
		numArray = new double[1];
		double numArray[0] = input.nextDouble();
		double numArray[1] = input.nextDouble();
		}
		
	
		return numArray;
	}
	

[kennith stomps]

Does anyone on this site know how to do this?

[Knute Snortum]

       double[] operandsArray;        operandsArray = new double[1];        operands = getOperand();
I don't think this will compile, will it?  Line 12 is okay, line 13 is unnecessary, and the variable operands is not declared.  You can do this all on one line:

double[] operandsArray = getOperand();

[Knute Snortum]

    public static double[] getOperand(double[] value) {
        System.out.println(" select your 2 numbers \n" );
         
        Scanner input = new Scanner(System.in);
         
        double[] numArray;
        numArray = new double[1];
        double numArray[0] = input.nextDouble();
        double numArray[1] = input.nextDouble();
        } // What's this doing here?
         
     
        return numArray;
    }

This will work for an array of exactly two elements, but don't you have to return an array of any length?  I believe the instructions give you a hint on how to do that.

[Edit: I didn't see that extra brace in the code.  That's not going to work.  See my comment in the code.]

[kennith stomps]

I guess nobody knows how to do this

[Norm Radder]

There has been lots of code posted.  Can you explain what is wrong with the code that has been posted?
If there are errors, copy the full text and paste it here so we can see them.


NOTE: If you are getting compiler error messages, please copy the full text of the messages and paste it here.

[Dean Nillson]

Kennith, 2 problems with your code.
you need to choose which method is going to instantiate your array of operands.
You have 2 options:
- instantiate the array before calling getOperand(...) in which case you need to pass the array as an argument of getOperand
- instantiate in the method getOperand(...) in which case you need to return the array at the end of getOperand.

At the moment, you are doing both which is confusing.

Secondly, you declare getOperand with a double[] as argument but when you call the method you don't pass the array as argument.

 public static double[] getOperand(double[] value) {
        System.out.println(" select your 2 numbers \n" );
         
        Scanner input = new Scanner(System.in);
         
        double[] numArray;
        numArray = new double[1];
        double numArray[0] = input.nextDouble();
        double numArray[1] = input.nextDouble();
        }

 operands = getOperand();