Thread: I'm Pretty Sure I Got It Right Yet I Keep Getting Errors

Yeah, I've been trying to debug this chunk of code to no avail. It seems correct yet I keep getting errors. I'm really new to this so bear with me.

public class Arithmetic
{
import java.util.Scanner;
 
   public static void main( String args[] )
   {
      Scanner input = new Scanner( System.in );  
      int num2;
      int num3;
      int sum;
      int product;
      int average;
 
      System.out.println( "Enter first integer:" );
      number1 = input.nextInt();    
 
      System.out.println( "Enter second integer:" );
      number2 = input.nextInt();
 
      System.out.println( "Enter third integer:" );
      number3 = input.nextInt();
 
      sum = num1 + num2 + num3;
      product = num1 * num2 * num3;
      average = ( num1 + num2 + num3 ) / 3;
 
      System.out.println( "The sum is %d\nThe product is %d\nThe average is %d", sum, 
         product, average );
   }
} // end class Arithmetic

Oh, sorry

--------------------Configuration: <Default>--------------------
C:\Users\Cam\Desktop\Arithmetic.java:3: error: illegal start of type
import java.util.Scanner;
^
C:\Users\Cam\Desktop\Arithmetic.java:3: error: ';' expected
import java.util.Scanner;
      ^
C:\Users\Cam\Desktop\Arithmetic.java:3: error: illegal start of type
import java.util.Scanner;
           ^
C:\Users\Cam\Desktop\Arithmetic.java:3: error: ';' expected
import java.util.Scanner;
                ^
C:\Users\Cam\Desktop\Arithmetic.java:3: error: <identifier> expected
import java.util.Scanner;
                        ^
5 errors
 
Process completed.

Originally Posted by Norm

The import statements should be before any class definitions.

What?!
Your norm is evolving!
*Amazing norm transformation*
Congratulations! You're Norm has transformed into a Super Moderator!

...
Congratulations.

Also, Norm gave you the correct answer. You import BEFORE the classes!

So I fixed that and it's seemingly created a whole new slew of errors. Any more advice?

import java.util.Scanner;
 
public class Arithmetic
{
      public static void main( String args[] )
   {
      Scanner input = new Scanner( System.in );  
      int num2;
      int num3;
      int sum;
      int product;
      int average;
 
      System.out.println( "Enter first integer:" );
      number1 = input.nextInt();    
 
      System.out.println( "Enter second integer:" );
      number2 = input.nextInt();
 
      System.out.println( "Enter third integer:" );
      number3 = input.nextInt();
 
      sum = num1 + num2 + num3;
      product = num1 * num2 * num3;
      average = ( num1 + num2 + num3 ) / 3;
 
      System.out.println( "The sum is %d\nThe product is %d\nThe average is %d", sum, product, average );
   }
} // end class Arithmetic

--------------------Configuration: <Default>--------------------
C:\Users\Cam\Desktop\Arithmetic.java:15: error: cannot find symbol
      number1 = input.nextInt();    
      ^
  symbol:   variable number1
  location: class Arithmetic
C:\Users\Cam\Desktop\Arithmetic.java:18: error: cannot find symbol
      number2 = input.nextInt();
      ^
  symbol:   variable number2
  location: class Arithmetic
C:\Users\Cam\Desktop\Arithmetic.java:21: error: cannot find symbol
      number3 = input.nextInt();
      ^
  symbol:   variable number3
  location: class Arithmetic
C:\Users\Cam\Desktop\Arithmetic.java:23: error: cannot find symbol
      sum = num1 + num2 + num3;
            ^
  symbol:   variable num1
  location: class Arithmetic
C:\Users\Cam\Desktop\Arithmetic.java:24: error: cannot find symbol
      product = num1 * num2 * num3;
                ^
  symbol:   variable num1
  location: class Arithmetic
C:\Users\Cam\Desktop\Arithmetic.java:25: error: cannot find symbol
      average = ( num1 + num2 + num3 ) / 3;
                  ^
  symbol:   variable num1
  location: class Arithmetic
C:\Users\Cam\Desktop\Arithmetic.java:27: error: no suitable method found for println(String,int,int,int)
      System.out.println( "The sum is %d\nThe product is %d\nThe average is %d", sum, product, average );
                ^
    method PrintStream.println(Object) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(String) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(char[]) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(double) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(float) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(long) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(int) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(char) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(boolean) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println() is not applicable
      (actual and formal argument lists differ in length)
7 errors
 
Process completed.

You're trying to use variables that you've not yet declared. The errors are telling you exactly which ones are the offending variables.

Alright I'm slowly getting it. I think there's just one more thing left that I can't figure out.

import java.util.Scanner;
 
public class Arithmetic
{
      public static void main( String args[] )
   {
      Scanner input = new Scanner( System.in );  
      int number1;
      int number2;
      int number3;
      int sum;
      int product;
      int average;
 
      System.out.println( "Enter first integer:" );
      number1 = input.nextInt();    
 
      System.out.println( "Enter second integer:" );
      number2 = input.nextInt();
 
      System.out.println( "Enter third integer:" );
      number3 = input.nextInt();
 
      sum = number1 + number2 + number3;
      product = number1 * number2 * number3;
      average = ( number1 + number2 + number3 ) / 3;
 
      System.out.println( "The sum is %d\nThe product is %d\nThe average is %d", sum, product, average );
   }
} // end class Arithmetic

--------------------Configuration: <Default>--------------------
C:\Users\Cam\Desktop\Arithmetic.java:28: error: no suitable method found for println(String,int,int,int)
      System.out.println( "The sum is %d\nThe product is %d\nThe average is %d", sum, product, average );
                ^
    method PrintStream.println(Object) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(String) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(char[]) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(double) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(float) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(long) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(int) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(char) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println(boolean) is not applicable
      (actual and formal argument lists differ in length)
    method PrintStream.println() is not applicable
      (actual and formal argument lists differ in length)
1 error
 
Process completed.

Seriously though you guys are awesome.

I've never used %d for output, have you tried using +'s? For example:

System.out.println("The info here is "+variable for info+"and "+variable for more info); ect?

I'm doing what you suggested like this and I still get the same error. Unless of course I'm doing it wrong (which I probably am).

 System.out.println( "The sum is +\nThe product is +nThe average is +", sum, product, average );

Yeah, just a couple of syntax errors, it would be like this:

System.out.println("The sum is "+sum+"/nThe product is "+product+"/nThe average is " +average);

That did the trick. Thank you so much man.