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My first program = Quiz :D

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  My first program = Quiz :D ericmiranda7@gmail.com - 2012-07-01 09:18 -0700
    Re: My first program = Quiz :D Patricia Shanahan <pats@acm.org> - 2012-07-01 09:33 -0700
      Re: My first program = Quiz :D ericmiranda7@gmail.com - 2012-07-01 09:47 -0700
        Re: My first program = Quiz :D Patricia Shanahan <pats@acm.org> - 2012-07-01 09:57 -0700
        Re: My first program = Quiz :D markspace <-@.> - 2012-07-01 10:11 -0700
        Re: My first program = Quiz :D Lew <noone@lewscanon.com> - 2012-07-01 10:20 -0700
    Re: My first program = Quiz :D ericmiranda7@gmail.com - 2012-07-01 10:20 -0700
      Re: My first program = Quiz :D Patricia Shanahan <pats@acm.org> - 2012-07-01 10:59 -0700
        Re: My first program = Quiz :D Roedy Green <see_website@mindprod.com.invalid> - 2012-07-03 05:16 -0700
    Re: My first program = Quiz :D Roedy Green <see_website@mindprod.com.invalid> - 2012-07-01 17:02 -0700

#1919 — My first program = Quiz :D

Alright, here is my first program. Just testing it.

----------------------------------------
import java.util.Scanner;
public class quiz {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
Scanner myScanner = new Scanner(System.in);

String thisString;
double points = 0;
double total;

System.out.println("Did Germany win vs. Portugal? Yes or no");
thisString = myScanner.nextLine();

if (thisString.equals("Yes")) {
	System.out.println("That is correct! Plus points!");
	total = points + 1;
	System.out.println("Is the Galaxy Tab android?");
	thisString = myScanner.nextLine();
	if (thisString.equals("Yes")) {
		System.out.println("That is correct. Plus points!");
		total = points + 1;
}
}
	}
}
---------------------------------------------------------
Now, my question is -
I wrote the statement(total = points + 1;)twice. Even though I answered "yes
(the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.

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#1920

On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
> Alright, here is my first program. Just testing it.
>
> ----------------------------------------
> import java.util.Scanner;
> public class quiz {
>
> 	/**
> 	 * @param args
> 	 */
> 	public static void main(String[] args) {
> 		// TODO Auto-generated method stub
> Scanner myScanner = new Scanner(System.in);
>
> String thisString;
> double points = 0;
> double total;
>
> System.out.println("Did Germany win vs. Portugal? Yes or no");
> thisString = myScanner.nextLine();
>
> if (thisString.equals("Yes")) {
> 	System.out.println("That is correct! Plus points!");
> 	total = points + 1;
> 	System.out.println("Is the Galaxy Tab android?");
> 	thisString = myScanner.nextLine();
> 	if (thisString.equals("Yes")) {
> 		System.out.println("That is correct. Plus points!");
> 		total = points + 1;
> }
> }
> 	}
> }
> ---------------------------------------------------------
> Now, my question is -
> I wrote the statement(total = points + 1;)twice. Even though I answered "yes
> (the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.
>

points is always zero - none of your code changes it - so (points + 1)
is always one.

Why the separate variables "points" and "total"?

Patricia

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#1921

On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
> > Alright, here is my first program. Just testing it.
> >
> > ----------------------------------------
> > import java.util.Scanner;
> > public class quiz {
> >
> > 	/**
> > 	 * @param args
> > 	 */
> > 	public static void main(String[] args) {
> > 		// TODO Auto-generated method stub
> > Scanner myScanner = new Scanner(System.in);
> >
> > String thisString;
> > double points = 0;
> > double total;
> >
> > System.out.println("Did Germany win vs. Portugal? Yes or no");
> > thisString = myScanner.nextLine();
> >
> > if (thisString.equals("Yes")) {
> > 	System.out.println("That is correct! Plus points!");
> > 	total = points + 1;
> > 	System.out.println("Is the Galaxy Tab android?");
> > 	thisString = myScanner.nextLine();
> > 	if (thisString.equals("Yes")) {
> > 		System.out.println("That is correct. Plus points!");
> > 		total = points + 1;
> > }
> > }
> > 	}
> > }
> > ---------------------------------------------------------
> > Now, my question is -
> > I wrote the statement(total = points + 1;)twice. Even though I answered "yes
> > (the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.
> >
> 
> points is always zero - none of your code changes it - so (points + 1)
> is always one.
> 
> Why the separate variables "points" and "total"?
> 
> Patricia

I'm a newbie, and I really don't know why I did that. Could you tell me how to update the points variable? I'd much appreciate it. Thanks.



On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
> > Alright, here is my first program. Just testing it.
> >
> > ----------------------------------------
> > import java.util.Scanner;
> > public class quiz {
> >
> > 	/**
> > 	 * @param args
> > 	 */
> > 	public static void main(String[] args) {
> > 		// TODO Auto-generated method stub
> > Scanner myScanner = new Scanner(System.in);
> >
> > String thisString;
> > double points = 0;
> > double total;
> >
> > System.out.println("Did Germany win vs. Portugal? Yes or no");
> > thisString = myScanner.nextLine();
> >
> > if (thisString.equals("Yes")) {
> > 	System.out.println("That is correct! Plus points!");
> > 	total = points + 1;
> > 	System.out.println("Is the Galaxy Tab android?");
> > 	thisString = myScanner.nextLine();
> > 	if (thisString.equals("Yes")) {
> > 		System.out.println("That is correct. Plus points!");
> > 		total = points + 1;
> > }
> > }
> > 	}
> > }
> > ---------------------------------------------------------
> > Now, my question is -
> > I wrote the statement(total = points + 1;)twice. Even though I answered "yes
> > (the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.
> >
> 
> points is always zero - none of your code changes it - so (points + 1)
> is always one.
> 
> Why the separate variables "points" and "total"?
> 
> Patricia



On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
> > Alright, here is my first program. Just testing it.
> >
> > ----------------------------------------
> > import java.util.Scanner;
> > public class quiz {
> >
> > 	/**
> > 	 * @param args
> > 	 */
> > 	public static void main(String[] args) {
> > 		// TODO Auto-generated method stub
> > Scanner myScanner = new Scanner(System.in);
> >
> > String thisString;
> > double points = 0;
> > double total;
> >
> > System.out.println("Did Germany win vs. Portugal? Yes or no");
> > thisString = myScanner.nextLine();
> >
> > if (thisString.equals("Yes")) {
> > 	System.out.println("That is correct! Plus points!");
> > 	total = points + 1;
> > 	System.out.println("Is the Galaxy Tab android?");
> > 	thisString = myScanner.nextLine();
> > 	if (thisString.equals("Yes")) {
> > 		System.out.println("That is correct. Plus points!");
> > 		total = points + 1;
> > }
> > }
> > 	}
> > }
> > ---------------------------------------------------------
> > Now, my question is -
> > I wrote the statement(total = points + 1;)twice. Even though I answered "yes
> > (the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.
> >
> 
> points is always zero - none of your code changes it - so (points + 1)
> is always one.
> 
> Why the separate variables "points" and "total"?
> 
> Patricia



On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
> > Alright, here is my first program. Just testing it.
> >
> > ----------------------------------------
> > import java.util.Scanner;
> > public class quiz {
> >
> > 	/**
> > 	 * @param args
> > 	 */
> > 	public static void main(String[] args) {
> > 		// TODO Auto-generated method stub
> > Scanner myScanner = new Scanner(System.in);
> >
> > String thisString;
> > double points = 0;
> > double total;
> >
> > System.out.println("Did Germany win vs. Portugal? Yes or no");
> > thisString = myScanner.nextLine();
> >
> > if (thisString.equals("Yes")) {
> > 	System.out.println("That is correct! Plus points!");
> > 	total = points + 1;
> > 	System.out.println("Is the Galaxy Tab android?");
> > 	thisString = myScanner.nextLine();
> > 	if (thisString.equals("Yes")) {
> > 		System.out.println("That is correct. Plus points!");
> > 		total = points + 1;
> > }
> > }
> > 	}
> > }
> > ---------------------------------------------------------
> > Now, my question is -
> > I wrote the statement(total = points + 1;)twice. Even though I answered "yes
> > (the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.
> >
> 
> points is always zero - none of your code changes it - so (points + 1)
> is always one.
> 
> Why the separate variables "points" and "total"?
> 
> Patricia

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#1922

On 7/1/2012 9:47 AM, ericmiranda7@gmail.com wrote:
> On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
...
>> Why the separate variables "points" and "total"?
>>
>> Patricia
>
> I'm a newbie, and I really don't know why I did that. Could you tell me how to update the points variable? I'd much appreciate it. Thanks.

I think you need to go back to whatever book or tutorial you are using,
and re-read the basics of variables and assignment statements.

Patricia

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#1923

On 7/1/2012 9:47 AM, ericmiranda7@gmail.com wrote:

>> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
>>> import java.util.Scanner;
>>> public class quiz {
>>>

>
> I'm a newbie, and I really don't know why I did that. Could you tell
> me how to update the points variable? I'd much appreciate it.
> Thanks.
>


To elaborate on Patricia's statement a bit, your code looks like a class 
assignment.  The "quiz" name is a dead give-away.  You should really 
talk to your instructor or TA, they're the ones who know what parts of 
your assignment you should be doing yourself and what parts you're 
allowed to get help on.  We're all kinda allergic to academic plagiarism 
here, which includes getting others to do your assignments for you.

If this really is not classwork, where did you get the "quiz" from?  Do 
you have a link?

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#1924

ericmiranda7... wrote:
> Patricia Shanahan wrote:
>> ericmiranda7... wrote:
>>> Alright, here is my first program. Just testing it.
>>>
>>> ----------------------------------------
>>> import java.util.Scanner;
>>> public class quiz {

Just a side note, but when you're beginning it's better to establish good 
habits than to have unlearn bad ones once you're more knowledgeable. In this 
case I'm referring to source-code formatting conventions, which are 
more-or-less universal for Java based on the standard in play since 1999.
<http://www.oracle.com/technetwork/java/codeconv-138413.html>

To fix your code to comply, spell type names (like 'quiz') with an initial 
upper-case letter ('Quiz').

Indent 2 or 4 spaces per logical nesting level. (Never use TAB characters to 
indent).

Fill out your Javadoc comments (the ones that start with /** ) completely.

Get rid of your template "// TODO Auto-generated" lines.

I'll return to your actual question below.

>>> 	/**
>>> 	 * @param args
>>> 	 */
>>> 	public static void main(String[] args) {
>>> 		// TODO Auto-generated method stub
>>> Scanner myScanner = new Scanner(System.in);
>>>
>>> String thisString;

Declare variables at the point of use. And use meaningful names. It isn't 
important that this is "this string" but that it represents user input.

>>> double points = 0;

Just '0', with no decimal point, is an 'int' constant. It's better style to 
initialize a double variable with a double constant.

>>> double total;
>>>
>>> System.out.println("Did Germany win vs. Portugal? Yes or no");
>>> thisString = myScanner.nextLine();

     String userInput = myScanner.nextLine();

>>> if (thisString.equals("Yes")) {
>>> 	System.out.println("That is correct! Plus points!");
>>> 	total = points + 1;

See how you changed the value of 'total'? You can do the same sort of thing 
with 'points'.

     points = points + 1;

Of course, 'points' will need an initial value for that to work.

>>> 	System.out.println("Is the Galaxy Tab android?");
>>> 	thisString = myScanner.nextLine();
>>> 	if (thisString.equals("Yes")) {
>>> 		System.out.println("That is correct. Plus points!");
>>> 		total = points + 1;
>>> }
>>> }
>>> 	}
>>> }
>>> ---------------------------------------------------------
>>> Now, my question is -
>>> I wrote the statement(total = points + 1;)twice. Even though I answered "yes
>>> (the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.
>>
>> points is always zero - none of your code changes it - so (points + 1)
>> is always one.
>>
>> Why the separate variables "points" and "total"?
>>
>> Patricia

Don't quote sigs.

> I'm a newbie, and I really don't know why I did that. Could you tell me how to update the points variable? I'd much appreciate it. Thanks.

Don't repeat the entire post twice.

> On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
>> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
>>> Alright, here is my first program. Just testing it.
>>>
>>> ----------------------------------------
>>> import java.util.Scanner;
>>> public class quiz {
... [snip] ...
>>
>> Why the separate variables "points" and "total"?

Don't repeat the entire post three times.

> On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
>> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
>>> Alright, here is my first program. Just testing it.
>>>
>>> ----------------------------------------
>>> import java.util.Scanner;
>>> public class quiz {
... [snip] ...
>>
>> Why the separate variables "points" and "total"?

My God, man!

> On Sunday, July 1, 2012 10:03:25 PM UTC+5:30, Patricia Shanahan wrote:
>> On 7/1/2012 9:18 AM, ericmiranda7@gmail.com wrote:
>>> Alright, here is my first program. Just testing it.
>>>
>>> ----------------------------------------
>>> import java.util.Scanner;
>>> public class quiz {
>>>
... [snip] ...
>>
>> Why the separate variables "points" and "total"?

Are you quite certain you posted the same material enough times?

Read the official tutorials.
<http://www.oracle.com/technetwork/java/index-jsp-135888.html>

-- 
Lew
Honi soit qui mal y pense.
http://upload.wikimedia.org/wikipedia/commons/c/cf/Friz.jpg

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#1925

On Sunday, July 1, 2012 9:48:55 PM UTC+5:30, ericmi...@gmail.com wrote:
> Alright, here is my first program. Just testing it.
> 
> ----------------------------------------
> import java.util.Scanner;
> public class quiz {
> 
> 	/**
> 	 * @param args
> 	 */
> 	public static void main(String[] args) {
> 		// TODO Auto-generated method stub
> Scanner myScanner = new Scanner(System.in);
> 
> String thisString;
> double points = 0;
> double total;
> 
> System.out.println("Did Germany win vs. Portugal? Yes or no");
> thisString = myScanner.nextLine();
> 
> if (thisString.equals("Yes")) {
> 	System.out.println("That is correct! Plus points!");
> 	total = points + 1;
> 	System.out.println("Is the Galaxy Tab android?");
> 	thisString = myScanner.nextLine();
> 	if (thisString.equals("Yes")) {
> 		System.out.println("That is correct. Plus points!");
> 		total = points + 1;
> }
> }
> 	}
> }
> ---------------------------------------------------------
> Now, my question is -
> I wrote the statement(total = points + 1;)twice. Even though I answered "yes
> (the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.

Oh uh-... No, this isn't a class project/assignment. I'm 15 Years, and I'm doing this as a hobby. The "Quiz" comes from teaching myself some basic Shell Scripting, and I wanted to master the "if" and so on. And the quiz seemed to have enough 'if' :)

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#1926

On 7/1/2012 10:20 AM, ericmiranda7@gmail.com wrote:
...
> Oh uh-... No, this isn't a class project/assignment. I'm 15 Years,
> and I'm doing this as a hobby. The "Quiz" comes from teaching myself
> some basic Shell Scripting, and I wanted to master the "if" and so
> on. And the quiz seemed to have enough 'if' :)
>

Do you have a book or on-line tutorial on Java programming? It is not
something I would recommend trying to learn by guessing, or by asking
questions one at a time when you get something wrong.

Patricia

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#1931

On Sun, 01 Jul 2012 10:59:21 -0700, Patricia Shanahan <pats@acm.org>
wrote, quoted or indirectly quoted someone who said :

>Do you have a book or on-line tutorial on Java programming?

You don't need an up-to-date text.  Used book stores should have some
almost free. If there is a Java User Group where you live, likely
members will have some slightly out of date texts they would give you
free.

Your guessing approach reminds me of the way I learned 7044 assembler.
There were no texts available when I was 15, so I just studied
listings from sample FORTRAN programs.  I still recall my joy at
suddenly figuring out the idea that an address was just a number that
you could do arithmetic on. Another was figuring out that some
arithmetic was done an assembly time and some at run time. These are
very obvious ideas once you see them, but are quite baffling until
that point.
-- 
Roedy Green Canadian Mind Products
http://mindprod.com
Why do so many operating systems refuse to define a standard 
temporary file marking mechanism? It could be a reserved lead character
such as the ~ or a reserved extension such as .tmp.
It could be a file attribute bit. Because they refuse, there is no 
fool-proof way to scan a disk for orphaned temporary files and delete them. 
Further, you can't tell where the orhaned files ame from. 
This means the hard disks gradually fill up with garbage.

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#1929

On Sun, 1 Jul 2012 09:18:55 -0700 (PDT), ericmiranda7@gmail.com wrote,
quoted or indirectly quoted someone who said :

>---------------------------------------------------------
>Now, my question is -
>I wrote the statement(total = points + 1;)twice. Even though I answered "yes
>(the correct answer to each question)twice my total points came to 1. Should they not add up and become two? Thank-you for the answers.

Your IDE has a trace. Watch it calculate. Or pepper your code with
out.println to see the intermediate results.


points = 0.

points +1 = 1

total = points 
thus gives 1

You want something like this 
total ++;
or

total += points;
-- 
Roedy Green Canadian Mind Products
http://mindprod.com
Why do so many operating systems refuse to define a standard 
temporary file marking mechanism? It could be a reserved lead character
such as the ~ or a reserved extension such as .tmp.
It could be a file attribute bit. Because they refuse, there is no 
fool-proof way to scan a disk for orphaned temporary files and delete them. 
Further, you can't tell where the orhaned files ame from. 
This means the hard disks gradually fill up with garbage.

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