Thread: increase while loop && var

while ((x<y) &&
				((red[0][x] != target) &&( red[1][x] != target) && (red[2][x] != target)
				&& (red[3][x] != target) && (red[4][x] != target) && (red[5][x] != target) && 
				(red[6][x]!= target) && (red[7][x]!= target) && (red[8][x] != target) && 
				(red[9][x] != target))){
					x++;

The problem is red is a variable and i need to check all the values in the red row. i dont know red will have 10 vaules.

any ideas? As im in a while loop i cant use a for loop here. x increases each time to check the columns, which works fine.

Originally Posted by Scotty

As im in a while loop i cant use a for loop here.

Why not? What happened when you tried?

Break the problem down into pieces...you want to check several array values using logic, so to you cold just create a method that checks the array for you, returning the logic boolean your while loop needs.

while ((x<y) &&
((red[0][x] != target) &&( red[1][x] != target) && (red[2][x] != target)
&& (red[3][x] != target) && (red[4][x] != target) && (red[5][x] != target) &&
(red[6][x]!= target) && (red[7][x]!= target) && (red[8][x] != target) &&
(red[9][x] != target))){
x++;

You could always check like this
Have another variable for the 0-9.
int z =0;

while ((x<y) && (red[z][x]!=target) && (z < red.length) &&(x < red[z].length))
{
x++;
z++;
}

Originally Posted by javapenguin

while ((x<y) &&
((red[0][x] != target) &&( red[1][x] != target) && (red[2][x] != target)
&& (red[3][x] != target) && (red[4][x] != target) && (red[5][x] != target) &&
(red[6][x]!= target) && (red[7][x]!= target) && (red[8][x] != target) &&
(red[9][x] != target))){
x++;

You could always check like this
Have another variable for the 0-9.
int z =0;

while ((x<y) && (red[z][x]!=target) && (z < red.length) &&(x < red[z].length))
{
x++;
z++;
}

Why.

Do you love giving incorrect answers? Did you test that at all?

My problem is I dont see how to increase/decrease 0-9 because of the &&. Using a for could increase or decrease the number but not add or take away a term from the while loop.

You could always use a for loop.

It depends, if the while loop is supposed to end if just one of those conditions is false, then use a boolean

boolean works = true;

if in your for loop, a value equals target, you change works to false and then it'll exit the while loop.

for loops dont remember the vars...... ie i how do i keep track of the position when it exits the loop?

Originally Posted by Scotty

for loops dont remember the vars...... ie i how do i keep track of the position when it exits the loop?

public class ForLoopTest {
   public static void main(String[] args) {
      int i;
      for(i = 0; i < 10; i++){
    	  //do something
      }
      System.out.println(i);
   }
}

strange, maybe its me, but my i always resets to 0..... even int i = 0; delcared outside....

Originally Posted by Scotty

strange, maybe its me, but my i always resets to 0..... even int i = 0; delcared outside....

Can you post the code, in SSCCE form, that does that? It works just fine for me.