Help, make the program start over
Hi!
I want to make this program to start over, an something is wrong, but I can not figure it out, this is new to me. the program is in swedish, but I will try to explaine the functions.
If you type in zero (0) the program will halt and ask for a value greater then zero. However when you type in a greater value, it will never do the actual calculation. If you from the begining type in a greater value it will do the math. Can anyone help me to correct this.
Plattform: mac and eclipse, with latest updates.
Java code:
import static javax.swing.JOptionPane.*;
public class sf?r {
public static void main (String[] arg) {
String indata;
indata = showInputDialog (null, "Ange radien i sf?ren du vill r?kna ut Volymen och Arean");
double radien = Double.parseDouble (indata);
int three = 3;
int four = 4;
double pi = 3.14;
double volym = four*pi*radien*radien*radien/three;
double area = four*pi*radien*radien;
while (radien <=0) {
indata = showInputDialog (null, "Felaktigt v?rde, Ange ett v?rde st?rre ?n 0");
radien = Double.parseDouble (indata);
showMessageDialog (null, "Volymen ?r " + volym + " Arean ?r " + area);
System.exit (0);
Martin
while (radien <=0) {
indata = showInputDialog (null, "Felaktigt v?rde, Ange ett v?rde st?rre ?n 0");
radien = Double.parseDouble (indata);
} this test for 0 is after you do the calculations:
double volym = four*pi*radien*radien*radien/three;
double area = four*pi*radien*radien; you need to test for 0 before the calculations.
just FYI, when posting code, there are "CODE" tags (look at the top of the posting window). It'll make the code much easier to read
Edited by: redfalconf35 on Nov 21, 2007 9:18 AM
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