coordinate finder syntax, if else statement help
import java.util.*;
publicclass Cartesian
{
publicstaticvoid main (String[] args)
{
double locale;
double origin;
double xaxis;
double yaxis;
double quad1;
double quad2;
double quad3;
double quad4;
double first;
double second;
double third;
double fourth;
Scanner console =new Scanner(System.in);
System.out.println("Enter x-coordinate: ");
double x = console.nextDouble();
System.out.println("Enter y-coordinate: ");
double y = console.nextDouble();
if (x == 0 && y == 0)
locale = origin;
if (x > 0 && y == 0)
locale = xaxis;
if (x < 0 && y == 0)
locale = xaxis;
if (x == 0 && y > 0)
locale = yaxis;
if (x == 0 && y < 0)
locale = yaxis;
if (x > 0 && y > 0)
locale = quad1;
if (x < 0 && y > 0)
locale = quad2;
if (x < 0 && y < 0)
locale = quad3;
if (x > 0 && y < 0)
locale = quad4;
quad1 = first;
quad2 = second;
quad3 = third;
quad4 = fourth;
System.out.println("(" + x +"," + y") " +"is on the " + locale"quadrant"));// ")" expected?
}
}
Question:
1.) How do I make an if statement that subtracts quadrant if it is the origin, otherwise it'd print (0,0) is on the origin quadrant
-Same goes with xaxis and yaxis
[2841 byte] By [
nsfoura] at [2007-11-27 2:56:53]
1) You code won't compile
System.out.println("(" + x + "," + y ") " + "is on the " + locale "quadrant"));
should be
System.out.println("(" + x + "," + y + ") " + "is on the " + locale + "quadrant");
2) What is the meaning of the following code ?
quad1 = first;
quad2 = second;
quad3 = third;
quad4 = fourth;
3) How do I make an if statement that subtracts quadrant if it is the origin, otherwise it'd print (0,0) is on the origin quadrant
I don't understand your question, but the logic should look like this
if (origin) {
// subtract quadrant
}
When I subtract that last ")" it still brings up error message ')' expectedThe quad1-4 code is converting the identifiers into proper names instead of:(x,y) is on the quad1 quadrantI want,(x,y) is on the first quadrantI couldn't think of any other way
You don't need all these local variables.public static void main (String[] args) {
Scanner console = new Scanner(System.in);
System.out.println("Enter x-coordinate: ");
double x = console.nextDouble();
System.out.println("Enter y-coordinate: ");
double y = console.nextDouble();
String location = "?";
if (x == 0 && y == 0) {
location = "origin";
} else if (y == 0) {
location = "x axis";
} else if (x == 0) {
location = "y axis";
} else if (x > 0) {
if( y > 0) {
//...
} else {
//...
}
} else {
if( y > 0) {
//...
} else {
//...
}
}
System.out.print("(" + x + "," + y ") is on the "+location);
}
> When I subtract that last ")" it still brings up
> error message ')' expected
You should check my previous post, you have some "+" sign missing.
> The quad1-4 code is converting the identifiers into
> proper names instead of:
>
> (x,y) is on the quad1 quadrant
>
> I want,
>
> (x,y) is on the first quadrant
>
>
> I couldn't think of any other way =\
You code is wrong. You need something like this
String myLocation = "origin";
if ( x,y = 1,1) {
myLocation = "first";
} else ( x,y = 1,-1) {
myLocation = "second";
}
System.out.println("It is in " + myLocation + " quadrant");
before trying your method which doesn't seem to fit because (1,-1) is not on the origin, i simplified mine..
all i want to do is assign the location a [lack of technical terms] the corresponding word.
import java.util.*;
public class Cartesian
{
public static void main (String[] args)
{
double locale;
double origin;
double xaxis;
double yaxis;
double first;
double second;
double third;
double fourth;
Scanner console = new Scanner(System.in);
System.out.println("Enter x-coordinate: ");
double x = console.nextDouble();
System.out.println("Enter y-coordinate: ");
double y = console.nextDouble();
if (x == 0 && y == 0)
locale = origin;
if (x > 0 && y == 0)
locale = xaxis;
if (x < 0 && y == 0)
locale = xaxis;
if (x == 0 && y > 0)
locale = yaxis;
if (x == 0 && y < 0)
locale = yaxis;
if (x > 0 && y > 0)
locale = first;
if (x < 0 && y > 0)
locale = second;
if (x < 0 && y < 0)
locale = third;
if (x > 0 && y < 0)
locale = fourth;
System.out.println("(" + x + "," + y + ") " + "is on the " + locale + "quadrant");
}
}
wait, Tim..I'm going to try yours, however, I can already see where I'm going to get confused..hold on and let me try to figure this out
> before trying your method which doesn't seem to fit
> because (1,-1) is not on the origin, i simplified
> mine..
>
> all i want to do is assign the location a [lack of
> technical terms] the corresponding word.
>
Yes, you are right. The code I given even don't compile.
I was just giving you the idea how to implement this.
I am not giving you the answer.
So, you have to digest the sample code (pseudocode).
And apply it in your program.
You need a String and assign the content based on some conditions.
I always hated those cascaded if-then-else thingies and I like squeezing
code to the max (read: minimum) so I would've done it this way:
0: zero
1: positive
2: negative
This little method can do it:public int value(double v) {
return (v == 0)?0:(v > 0)?1:2;
}
And this number:int i= value(x)+3*value(y);
Tells your all:
0: origin
1: positive x axis
2: negative x axis
3: positive y axis
4: 1st quadrant
5: 2nd quadrant
6: negative y axis
7: 3rd quadrant
8: 4th quadrant
kind regards,
Jos
true rym82.
as for the code, i got it up to this and reached a syntax error.
import java.util.*;
public class CartesianAlter
{
public static void main (String[] args); //missing method body, or declare abstract
{
Scanner console = new Scanner(System.in);
System.out.println("Enter x-coordinate:");
double x = console.nextDouble();
System.out.println("Enter y-coordinate:");
double y = console.nextDouble();
String location = "?";
if (x == 0 && y == 0) {
location = "origin";
} else if (y == 0) {
location = "x axis";
} else if (x == 0) {
location = "y axis";
} else if (x > 0 && y == 0) {
location = "first quadrant";
} else if (x < 0 && y > 0) {
location = "second quadrant";
} else if (x < 0 && y < 0) {
location = "third quadrant";
} else if (x > 0 && y < 0) {
location = "fourth quadrant";
}
System.out.print(x + "," + y + "is on the " +location);
}
}
> I always hated those cascaded if-then-else thingies
> and I like squeezing
> code to the max (read: minimum) so I would've done it
> this way:
> 0: zero
> 1: positive
> 2: negative
> This little method can do it:> public int value(double v) {
>return (v == 0)?0:(v > 0)?1:2;
> code]
> And this number:[code]
> int i= value(x)+3*value(y);
> Tells your all:
> 0: origin
> 1: positive x axis
> 2: negative x axis
> 3: positive y axis
> 4: 1st quadrant
> 5: 2nd quadrant
> 6: negative y axis
> 7: 3rd quadrant
> 8: 4th quadrant
> kind regards,
>
> Jos
i really do appreciate your alternative method, however, i think im going to rough it out on the if else statements.
thanks again! =]
public static void main (String[] args); //missing method body, or declare abstract
to
public static void main (String[] args) //missing method body, or declare abstract
You would see the magic that the code compiles (hopefully) when the semi-colon gone.
The error message always tell you what and where the errors are.
It would be helpful for yourself to understand it.
import java.util.*;
public class CartesianAlter
{
public static void main (String[] args)
{
Scanner console = new Scanner(System.in);
System.out.println("Enter x-coordinate:");
double x = console.nextDouble();
System.out.println("Enter y-coordinate:");
double y = console.nextDouble();
String location = "origin";
String location = "x axis";//location is already defined in main(java.lang.String[])
String location = "y axis";
String location = "first quadrant";
String location = "second quadrant";
String location = "third quadrant";
String location = "fourth quadrant";
if (x == 0 && y == 0) {
location = "origin";
} else if (y == 0) {
location = "x axis";
} else if (x == 0) {
location = "y axis";
} else if (x > 0 && y == 0) {
location = "first quadrant";
} else if (x < 0 && y > 0) {
location = "second quadrant";
} else if (x < 0 && y < 0) {
location = "third quadrant";
} else if (x > 0 && y < 0) {
location = "fourth quadrant";
}
System.out.print(x + "," + y + " is on the " + location);
}
}
i already tried mixing up the strings like location1, location2.. but it keeps printing origin.
this is probably the last question.
Your reply #9 should work, why do you move to #12 ?
Use should not declare a variable so many times.
You can assign value to a variable as many time as you like.
String myLocation = "a";
myLocation = "b";
myLocation = "c";
myLocation = "d";
I would suggest you to start by reading the basic tutorial.
You can't declare several variables with the same name.
And you dont need to have several variables here. You need one variable, and assign it a value depending on x and y (that's the job of the if/else statement.)
By the way, your condition for the first quadrant is probably wrong...
dudes..thank you so much..i love you all.now i have to crank out another program before 11:45..so beware of my controlled spamming..muahahahaha
