Output a Two Decimal Value

It's suppose to display 12.50 but instead it's displaying 0.0 :(whew):

Code:

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import java.io.*;

public class InputOutput {
        public static void main(String[] args) {
                String base="";
                String height="";
               
                BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
                try {
                        System.out.print("Input base value = ");
                        base = input.readLine();
                        System.out.print("Input height value = ");
                        height = input.readLine();
                } catch(IOException e) {
                        System.out.print("Error");
                }
               
                float area = 1/2*(Integer.parseInt(base)* Integer.parseInt(height));
System.out.println("The Area of the right triangle is "+ area);
        }
}

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Integer division (as in 1/2) chops of the entire fractional part of the quotient, so 1/2 == 0. Either multiply by 0.5 or do the division using floating point numbers, as in 1.0/2.0

kind regards,

Jos

But i need to use the formula 1/2*bh for computing for the area of the triangle. What should I change in the code? :=(:

Quote:

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Originally Posted by Hillsid3

But i need to use the formula 1/2*bh for computing for the area of the triangle. What should I change in the code? :=(:

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0.5*bh?

kind regards,

Jos (<--- rocket scientist)

no, i mean i still have to use 1/2 not 0.5

Quote:

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Originally Posted by Hillsid3

no, i mean i still have to use 1/2 not 0.5

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Who said so? b.t.w. 1/2 equals 0 in Java, so you can't use it here, you have to rewrite your expression a bit ...

kind regards,

Jos

Please re-read the entire text of the 2nd post in this thread: 2nd post

Both of these will work:

float area = (1f/2f) * (Integer.parseInt(base)* Integer.parseInt(height));

float area = (0.5f) * (Integer.parseInt(base)* Integer.parseInt(height));


The problem is (as JosAH says) is that 1/2 =0.0 (because they are assumed to be int literals) so you need to make them float literals to return 0.5 correctly.

-Babbard