passing variables

[andy hough]

I have produced a program which in short is shown below:

public class Main{
public Main(){
}

public static void main(String[] args){
int array[][]=new int[65][65];
enter some values into the array;

functionOne(1);

output the array showing the changes made by functionOne()
}

public void functionOne(int x){
change the value of array[x][2];
}
}

However, I get various errors about either the array isnot accessible or I cannot reference from a static to a non static.

How would I achieve the above code?

Many thanks in advance

[Remko Strating]

Change

  
public void functionOne(int x){
change the value of array[x][2];
}
}

to

    
public static void functionOne(int x){
change the value of array[x][2];
}
}

[Joanne Neal]

Or create a Main object and call the method with that

public static void main(String[] args){
  int array[][]=new int[65][65];
 
  Main m = new Main();
  m.functionOne(1);
}

[andy hough]

ok I did that, but within the functionOne() i get errors saying symbol cant be found, syymbol=array

[fred rosenberger]

Andy,

It's kind of tough to diagnose the problem with a) the real code, and b) the exact text of the error message.

we could guess, but if you'd post both, that would help.

PLEASE use the 'code' tags to preserve your formatting. press that little 'code' button in the "instant UBB Code" section, then past your code between the tags it generates.

thanks!!!

[andy hough]

ok, here is the which was represented by functionOne():

  public static void eliminate(int toElim){
        //eliminate placements to create a puzzle
        int eliminateRows[]=new int[16];
        int chosenRow=toElim;
        int currentNode=0;
        int check=0;
        int thisRow=1983; //check digit
        while(currentNode!=999){
            Node nextNode=dlxGrid[chosenRow][currentNode].getNext();
            int temp=dlxGrid[chosenRow][currentNode].getElement();
            int tempElem=nextNode.getElement();
            System.out.println("dlxGrid["+chosenRow+"]["+currentNode+"]= "+temp);
            if(currentNode!=0){
                int currentRow=0;
                while(currentRow!=65){
                    Node downNode=dlxGrid[currentRow][currentNode].getDown();
                    int tempElem3=downNode.getRow();
                    if(tempElem3!=0 && tempElem3!=65){
                        eliminateRows[check]=tempElem3;
                        System.out.println("-----> dlxGrid["+tempElem3+"]["+currentNode+"]"+eliminateRows[check]);
                        check++;
                    }
                    currentRow=tempElem3;
                }
            }
            currentNode=tempElem;
        }
        
        int eRow;
        for(eRow=0;eRow<16;eRow++){
            int elim=eliminateRows[eRow];
            if(elim>0 && elim<65){
                int columnNode=0;
                int tempNode=0;
                while(columnNode!=999){
                    Node nodeAbove=dlxGrid[elim][tempNode].getUp();
                    Node nodeBelow=dlxGrid[elim][tempNode].getDown();
                    int nAbove=nodeAbove.getRow();
                    int nBelow=nodeBelow.getRow();
                    dlxGrid[nAbove][tempNode].setDown(dlxGrid[nBelow][tempNode]);
                    dlxGrid[nBelow][tempNode].setUp(dlxGrid[nAbove][tempNode]);
                    Node tt=dlxGrid[elim][tempNode].getNext();
                    columnNode=tt.getElement();
                    tempNode=columnNode;
                }
            }
        }
        //return Node;
    }   

the error messages are all variations of:

                      dlxGrid[nBelow][tempNode].setUp(dlxGrid[nAbove][tempNode]);
D:\Proto1\DLX2\src\dlx2\Main.java:409: cannot find symbol
symbol  : variable dlxGrid
location: class dlx2.Main
                    dlxGrid[nBelow][tempNode].setUp(dlxGrid[nAbove][tempNode]);
  

[fred rosenberger]

where is dlxGrid defined? What the message is telling you is that this variable is out of scope. if it's declared in a method, then it goes out of scope when that method closes.