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 10232009, 04:46 PM #1Member
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Can someone help me with this code?
I'm making a program to find the distance between two points.
Java Code:import cs1.Keyboard; import java.text.NumberFormat; import static java.lang.Math.*; public class Distance { public static void main (String[] args) { System.out.println ("Enter the first x coordinate: "); double x1 = Keyboard.readInt(); System.out.println ("Enter the first y coordinate: "); double y1 = Keyboard.readInt(); System.out.println ("Enter the second x coordinate: "); double x2 = Keyboard.readInt(); System.out.println ("Enter the second y coordinate: "); double y2 = Keyboard.readInt(); double distance = sqrt((x1x2)(x1x2) + (y1y2)(y1y2)); System.out.println ("The distance is:" + distance); } }
unexpected type. At the sqrt line.
And I use BlueJ
Please helppp! :)

There is no method in your class called sqrt. You probably want to use the static sqrt method found in the Math class. To use this, you must call it on the class:
not
sqrt(...)
but
Math.sqrt(...)
 10232009, 04:57 PM #3
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... also Java is too stupid to smell that it has to multiply two operands when they are next to each other.
kind regards,
Jos

 10232009, 05:09 PM #5
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 10232009, 05:14 PM #7
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 10242009, 12:37 AM #8Member
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Ive already used Math.sqrt and I still get the same error.. I need to finish this program for my class.
And also I cant use c++, its a java class.
 10242009, 12:40 AM #9Senior Member
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Did you include the * to tell Java that you are multiplying like has already been suggested?
 10242009, 12:53 AM #10Member
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Omg, r035198x, THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 10252009, 01:22 PM #11
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 10272009, 10:57 AM #12Member
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Instead of this
double distance = sqrt((x1x2)(x1x2) + (y1y2)(y1y2));
Use the static method's provided by the Math class like Math.sqrt(), Math.pow()
final int SQUARE = 2;
double distance = Math.sqrt(Math.pow((x2x1), SQUARE)+ Math.pow((y2y1), SQUARE));

And the advantage of using Math.pow is (besides being significantly slower than the previous solutions, that is)?
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