Why wont this compile?

[Student101]

i am doing an assignment for a course where you are supposed to create a program where it takes an inputted number of an inputted base, and converts it into a decimal(base 10). i have gotten this far and i am stuck. it will not compile and i am wondering if this is the best way to go about it?

Here is the code i have so far:

import java.util.Scanner;

public class AA3Q1{


	public static void main(String[] args) {

		int base;
		int binaryNumber;
		getNumberInBase();

		Scanner kbd = new Scanner(System.in);
		System.out.print("Enter a base.");
		base = kbd.nextInt();



		System.out.print(base, binaryNumber);

	}

	public static int getNumberInBase( Scanner scanner, int binaryNumber) {

	// get input from the user.
	Scanner kbd = new Scanner(System.in);
	System.out.print("Enter a binary number:");
	binaryNumber = kbd.nextInt();
	return binaryNumber;

	}
	public static int convertToDecimal(int number, int base, int binaryNumber, int copyOfBinNum, int currPower, int decimalNumber) {

			// keep looping until -1 is encountered.
			while (binaryNumber != -1) {

				// reset values to 0, use copyOfBinNum for calculations.
				decimalNumber = 0;
				currPower = 0;
				copyOfBinNum = binaryNumber;

			}
			// keep looping until all digits of copyOfBinNum are removed.
			while (copyOfBinNum > 0) {

				// get last digit and strip it off copyOfBinNum
				currDigit = (int) copyOfBinNum % 10;
				copyOfBinNum /= 10;

				// add to the running total if the digit is one
				if (currDigit < 10) {
					decimalNumber += Math.pow(base,currPower);
					return decimalNumber;
				}

				// increment the power of two for next loop.
				currPower++;
			}

				return null;


	}
	public static void printResults(int number, int base, int result) {

	convertToDecimal();

	System.out.println("you input the number " + number + " in the base " + base + ". This number as a power of 10 is " + result + ".");

	}
}

Here is the Error message:

C:\Users\chelsea\Downloads\A3Q1.java:19: cannot find symbol
symbol : variable nextInt
location: class java.util.Scanner
base=keyboard.nextInt;
^
1 error

Tool completed with exit code 1

[Tolls]

That code is not in the code you posted.
Therefore that error has not come from compiling this code.

[Allspark]

Correct code or not, that error arises when you forget the parenthesis after nextInt. So variable = kbd.nextInt();
Also, the code that you inputted here does call the methods you have created but does not know where to assign the returned value. For example:

public static void main(String[] args) {

		int base;
		int binaryNumber;
		[COLOR="Red"]binaryNumber = [/COLOR]getNumberInBase();

		Scanner kbd = new Scanner(System.in);
		System.out.print("Enter a base.");
		base = kbd.nextInt();

               

		System.out.print(base, binaryNumber);

	}

then you're not calling the rest of your methods so that code never executes.

[Student101]

thank-you both of you. but ok so how do i show it where to assign the value? and do i have to call all of the methods in the code for it to execute?

[Student101]

Ok so i got am little bit further. now there is only 1 error message. Any ideas how i would fix it?

Here is the code:

import java.util.Scanner;

public class DanielsonErikA3Q1{

private static int currDigit;
private static int base;


	public static void main(String[] args) {

		int base;
		int binaryNumber;

		Scanner kbd = new Scanner(System.in);
		System.out.print("Enter a base.");
		base = kbd.nextInt();



		System.out.println(base, binaryNumber);

	}

	public static int getNumberInBase( Scanner scanner, int binaryNumber) {

	// get input from the user.
	Scanner kbd = new Scanner(System.in);
	System.out.print("Enter a binary number:");
	binaryNumber = kbd.nextInt();
	return binaryNumber;

	}
	public static int convertToDecimal(int number, int base, int binaryNumber, int copyOfBinNum, int currPower, int decimalNumber) {

			// keep looping until -1 is encountered.
			while (binaryNumber != -1) {

				// reset values to 0, use copyOfBinNum for calculations.
				decimalNumber = 0;
				currPower = 0;
				copyOfBinNum = binaryNumber;

			}
			// keep looping until all digits of copyOfBinNum are removed.
			while (copyOfBinNum > 0) {

				// get last digit and strip it off copyOfBinNum
				currDigit = (int) copyOfBinNum % 10;
				copyOfBinNum /= 10;

				// add to the running total if the digit is one
				if (currDigit < 10) {
					decimalNumber += Math.pow(base,currPower);
					return decimalNumber;
				}

				// increment the power of two for next loop.
				currPower++;
			}

				return decimalNumber;


	}
	public static void printResults(int number, int base, int result) {



	System.out.println("you input the number " + number + " in the base " + base + ". This number as a power of 10 is " + result + ".");

	}
}

Here is the error message:

C:\Users\chelsea\Downloads\DanielsonErikA3Q1.java: 20: cannot find symbol
symbol : method println(int,int)
location: class java.io.PrintStream
System.out.println(base, binaryNumber);
^
1 error

Tool completed with exit code 1

[Fubarable]

The error message is telling you what's wrong. It can't find println(int, int) because this method simply doesn't exist. println takes a String parameter, not two ints.

[Student101]

Oops! sorry about that posted the wrong code. thanks though. here is what i am having a problem with.

Here is the code:

import java.util.Scanner;

public class DanielsonErikA3Q1{

private static int currDigit;
private static int base;
private static int binaryNumber;
private static int decimalNumber;


	public static void main(String[] args) {


		int base;
		int binaryNumber;

		Scanner kbd = new Scanner(System.in);
		System.out.print("Enter a base.");
		base = kbd.nextInt();

		System.out.println(base + "" + binaryNumber);

		printResults();


	}

	public static int getNumberInBase( Scanner scanner, int binaryNumber) {

	// get input from the user.
	Scanner kbd = new Scanner(System.in);
	System.out.print("Enter a binary number:");
	binaryNumber = kbd.nextInt();
	return binaryNumber;

	}
	public static int convertToDecimal(int number, int base, int binaryNumber, int copyOfBinNum, int currPower, int decimalNumber) {

			// keep looping until -1 is encountered.
			while (binaryNumber != -1) {

				// reset values to 0, use copyOfBinNum for calculations.
				decimalNumber = 0;
				currPower = 0;
				copyOfBinNum = binaryNumber;

			}
			// keep looping until all digits of copyOfBinNum are removed.
			while (copyOfBinNum > 0) {

				// get last digit and strip it off copyOfBinNum
				currDigit = (int) copyOfBinNum % 10;
				copyOfBinNum /= 10;

				// add to the running total if the digit is one
				if (currDigit < 10) {
					decimalNumber += Math.pow(base,currPower);
					return decimalNumber;
				}

				// increment the power of two for next loop.
				currPower++;
			}

				return decimalNumber;


	}
	public static void printResults(int binaryNumber, int base, int decimalNumber) {



	System.out.println("you input the number " + binaryNumber + " in the base " + base + ". This number as a power of 10 is " + decimalNumber + ".");

	}
}

Here is the Error:

C:\Users\chelsea\Downloads\DanielsonErikA3Q1.java: 23: printResults(int,int,int) in DanielsonErikA3Q1 cannot be applied to ()
printResults();
^
1 error

Tool completed with exit code 1

[lonegreyride]

At the end of your main() method, you call printResults, but pass no arguments to it. It requres three int values.

[DarrylBurke]

println takes a String parameter

Um, one of the 10 overloads does.

db